WO2020138364A1 - 高レバウジオシドd含有ステビア植物 - Google Patents
高レバウジオシドd含有ステビア植物 Download PDFInfo
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- WO2020138364A1 WO2020138364A1 PCT/JP2019/051299 JP2019051299W WO2020138364A1 WO 2020138364 A1 WO2020138364 A1 WO 2020138364A1 JP 2019051299 W JP2019051299 W JP 2019051299W WO 2020138364 A1 WO2020138364 A1 WO 2020138364A1
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L33/00—Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof
- A23L33/10—Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof using additives
- A23L33/105—Plant extracts, their artificial duplicates or their derivatives
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01H—NEW PLANTS OR NON-TRANSGENIC PROCESSES FOR OBTAINING THEM; PLANT REPRODUCTION BY TISSUE CULTURE TECHNIQUES
- A01H1/00—Processes for modifying genotypes ; Plants characterised by associated natural traits
- A01H1/10—Processes for modifying non-agronomic quality output traits, e.g. for industrial processing; Value added, non-agronomic traits
- A01H1/101—Processes for modifying non-agronomic quality output traits, e.g. for industrial processing; Value added, non-agronomic traits involving biosynthetic or metabolic pathways, i.e. metabolic engineering, e.g. nicotine or caffeine
- A01H1/102—Processes for modifying non-agronomic quality output traits, e.g. for industrial processing; Value added, non-agronomic traits involving biosynthetic or metabolic pathways, i.e. metabolic engineering, e.g. nicotine or caffeine involving modified carbohydrate or sugar alcohol metabolism, e.g. starch biosynthesis
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01H—NEW PLANTS OR NON-TRANSGENIC PROCESSES FOR OBTAINING THEM; PLANT REPRODUCTION BY TISSUE CULTURE TECHNIQUES
- A01H1/00—Processes for modifying genotypes ; Plants characterised by associated natural traits
- A01H1/04—Processes of selection involving genotypic or phenotypic markers; Methods of using phenotypic markers for selection
- A01H1/045—Processes of selection involving genotypic or phenotypic markers; Methods of using phenotypic markers for selection using molecular markers
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01H—NEW PLANTS OR NON-TRANSGENIC PROCESSES FOR OBTAINING THEM; PLANT REPRODUCTION BY TISSUE CULTURE TECHNIQUES
- A01H1/00—Processes for modifying genotypes ; Plants characterised by associated natural traits
- A01H1/10—Processes for modifying non-agronomic quality output traits, e.g. for industrial processing; Value added, non-agronomic traits
- A01H1/101—Processes for modifying non-agronomic quality output traits, e.g. for industrial processing; Value added, non-agronomic traits involving biosynthetic or metabolic pathways, i.e. metabolic engineering, e.g. nicotine or caffeine
- A01H1/102—Processes for modifying non-agronomic quality output traits, e.g. for industrial processing; Value added, non-agronomic traits involving biosynthetic or metabolic pathways, i.e. metabolic engineering, e.g. nicotine or caffeine involving modified carbohydrate or sugar alcohol metabolism, e.g. starch biosynthesis
- A01H1/103—Non-starch polysaccharides, e.g. cellulose, fructans or levans
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01H—NEW PLANTS OR NON-TRANSGENIC PROCESSES FOR OBTAINING THEM; PLANT REPRODUCTION BY TISSUE CULTURE TECHNIQUES
- A01H4/00—Plant reproduction by tissue culture techniques ; Tissue culture techniques therefor
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01H—NEW PLANTS OR NON-TRANSGENIC PROCESSES FOR OBTAINING THEM; PLANT REPRODUCTION BY TISSUE CULTURE TECHNIQUES
- A01H5/00—Angiosperms, i.e. flowering plants, characterised by their plant parts; Angiosperms characterised otherwise than by their botanic taxonomy
- A01H5/12—Leaves
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01H—NEW PLANTS OR NON-TRANSGENIC PROCESSES FOR OBTAINING THEM; PLANT REPRODUCTION BY TISSUE CULTURE TECHNIQUES
- A01H6/00—Angiosperms, i.e. flowering plants, characterised by their botanic taxonomy
- A01H6/14—Asteraceae or Compositae, e.g. safflower, sunflower, artichoke or lettuce
- A01H6/1488—Stevia
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L2/00—Non-alcoholic beverages; Dry compositions or concentrates therefor; Their preparation
- A23L2/52—Adding ingredients
- A23L2/60—Sweeteners
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L33/00—Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof
- A23L33/20—Reducing nutritive value; Dietetic products with reduced nutritive value
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
- C12Q1/00—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions
- C12Q1/68—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions involving nucleic acids
- C12Q1/6876—Nucleic acid products used in the analysis of nucleic acids, e.g. primers or probes
- C12Q1/6888—Nucleic acid products used in the analysis of nucleic acids, e.g. primers or probes for detection or identification of organisms
- C12Q1/6895—Nucleic acid products used in the analysis of nucleic acids, e.g. primers or probes for detection or identification of organisms for plants, fungi or algae
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
- C12Q2600/00—Oligonucleotides characterized by their use
- C12Q2600/13—Plant traits
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
- C12Q2600/00—Oligonucleotides characterized by their use
- C12Q2600/156—Polymorphic or mutational markers
Definitions
- the present invention relates to a stevia plant having a high content of rebaudioside D.
- Patent Document 1 discloses a functional sweetener composition containing a vitamin, a high-potency sweetener, and a sweet taste improving composition.
- Rebaudioside (hereinafter also referred to as “Reb”) is known as a sweet component contained in stevia extract.
- Stevia extract is extracted and purified from Stevia leaves.
- Stevia is a chrysanthemum family perennial plant that originates in Paraguay, South America, and the scientific name is Stevia Rebaudiana Bertoni (Stevia Rebaudiana Bertoni). Since stevia contains a component having a sweetness about 300 times or more that of sugar, it is cultivated to extract the sweetening component and use it as a natural sweetener.
- As Reb the presence of various glycosides such as RebA, RebB, RebC, RebD, RebE, and RebM has been reported (Table 2012-504552).
- RebA for example, is evaluated as a sweetener having a high degree of sweetness and a high-quality sweetness, and is widely used. Other Rebs are also being found to have their own sweetness and associated taste.
- Patent Document 3 a Stevia plant containing 3.28% RebD per dry leaf is known.
- RebD is said to have a good taste among steviol glycosides, but it is not possible to obtain much from natural Stevia plants, and its availability is a problem.
- the present invention provides a high-RebD-containing Stevia plant containing RebD in a higher content than that of a wild-type Stevia species, and a method for producing and screening the plant.
- the invention provides: [1] A high rebaudioside D (RebD)-containing stevia plant body containing 3.3% or more of RebD per unit mass of dried leaves. [2] The plant according to [1], which is homozygous for the allele in which the base at the position corresponding to position 201 of SEQ ID NO: 1 is A. [3] The plant according to [1] or [2], which further has at least one of the following genetic characteristics. (1) It is homozygous for the allele in which the base at the position corresponding to position 40 of SEQ ID NO: 2 is T. (2) Homozygosity for the allele in which the base at the position corresponding to position 44 of SEQ ID NO: 3 is T.
- RebD rebaudioside D
- [6] The plant according to any one of [1] to [5], which comprises a stevia plant and a progeny plant thereof that have been subjected to a mutagenesis treatment.
- [7] A seed, tissue, tissue culture or cell of the plant according to any one of [1] to [6].
- [8] The tissue, tissue culture or cell according to [7], which is selected from embryos, meristem cells, pollen, leaves, roots, root tips, petals, protoplasts, leaf sections and callus.
- [9] Containing 3.3% or more of RebD per unit mass of dry leaf, which comprises a step of crossing the plant according to any one of [1] to [6] with a second Stevia plant A method for producing a Stevia plant having high RebD content.
- the method according to [9], wherein the second plant is the plant according to any one of [1] to [5].
- the method for producing a food/beverage product, a sweetening composition, a flavor or a pharmaceutical product which comprises the step of providing the extract, and the step of adding the extract to a raw material of a food/beverage product, a sweetening composition, a flavor or a pharmaceutical product. ..
- a step of detecting the presence and/or absence of a genetic feature that is homozygous for an allele having a base A at the position corresponding to position 201 of SEQ ID NO: 1 from the genome of a test Stevia plant Method for screening Stevia plant having high RebD content.
- [16] The method according to [15], further comprising the step of detecting the presence and/or absence of at least one of the following genetic characteristics from the genome of the test Stevia plant.
- (1) It is homozygous for the allele in which the base at the position corresponding to position 40 of SEQ ID NO: 2 is T.
- (2) Homozygosity for the allele in which the base at the position corresponding to position 44 of SEQ ID NO: 3 is T.
- the method further comprises detecting from the genome of the test Stevia plant the presence and/or absence of the genetic feature that is heterozygous for the allele whose base at position 49 corresponding to SEQ ID NO: 6 is A. [ 15] or the method described in [16]. [18] The method according to any one of [15] to [17], wherein the step of detecting the genetic characteristic is performed using the CAPS method, dCAPS method, or TaqMan PCR method. [19] The method according to any one of [15] to [18], further comprising the step of measuring the content of the sweetness component of the test stevia plant tissue.
- a reagent for detecting the presence and/or absence of at least one of the following genetic features (1) to (4) comprising a reagent for detecting the presence and/or absence of at least one of the following genetic features (1) to (4).
- a method for producing a high RebD-containing Stevia plant comprising a step of introducing a mutation from C to A at a position corresponding to position 201 of SEQ ID NO: 1.
- the method according to [24] wherein the introduction of the mutation is performed by a mutagenesis process.
- a Stevia plant containing more RebD means for producing such a plant, leaves obtained from such a plant, foods and beverages containing RebD obtained from this leaf, etc. Can be provided.
- High RebD-containing Stevia plant having at least one of the following features (1) to (4) (hereinafter, "plant of the present invention” or “stevia plant of the present invention”). (Sometimes collectively referred to as “body”). (1) Containing 3.3% or more of RebD per unit mass of dried leaf (hereinafter, may be referred to as “plant A of the present invention” or “stevia plant A of the present invention”). (2) Containing 2.6% or more RebD and 0.4% or more RebM per unit mass of dry leaf (hereinafter referred to as "plant B of the present invention” or “stevia plant B of the present invention”) Sometimes).
- plant C of the present invention A total of 3.7% or more of RebD and RebM per unit mass of dried leaves (hereinafter, may be referred to as "plant C of the present invention” or “stevia plant C of the present invention”).
- plant D of the present invention A total of 3.7% or more of RebD and RebM per unit mass of dried leaves.
- Total steviol glycoside is a generic term for measurable steviol glycosides, and does not include unknown steviol glycosides or steviol glycosides present in amounts below the detection limit. ..
- the total steviol glycoside is RebA, RebB, RebD, RebE, RebF, RebI, RebJ, RebK, RebM, RebN, RebO, RebQ, RebR, Zulcoside A, Rubusoside, Steviol, Steviol monoside, Steviolbio. Any combination of two or more selected from the group consisting of side and stevioside.
- the total steviol glycoside consists of RebA, RebB, RebM, RebD, RebF, RebM and steviol
- the total steviol glycoside is RebA, RebB, RebM, RebD, It may consist of RebF, RebM, RebN, RebO and steviol.
- containing 3.3% or more of RebD per unit mass of dry leaf means, for example, that the ratio of 3.3% by mass or more to a predetermined amount of dry leaf (for example, 50 mg). It means that RebD (for example, 1.65 mg or more) is contained.
- the ratio of RebD per unit mass of dried leaves in this aspect is not limited, and is, for example, 3.3% or more, 3.4% or more, 3.5% or more, 3.6% or more, 3.7%.
- the upper limit of the ratio of RebD per unit mass of dried leaf is not particularly limited, but may be, for example, 20%, 15%, 10%.
- the dry leaf refers to a leaf of which the water content is reduced to 3 to 4% by weight by drying the fresh leaf of the Stevia plant of the present invention.
- containing 2.6% or more of RebD and 0.4% or more of RebM per unit mass of dry leaf means, for example, in a dry leaf of a predetermined mass (for example, 50 mg), RebD in a ratio of 2.6% by mass or more (for example, 1.3 mg or more per 50 mg of dry leaves) and 0.4% by mass or more of RebM (for example, 0.2 mg or more per 50 mg of dry leaves) are contained. means.
- the ratio of RebD and RebM per unit mass of dried leaves in this aspect is not limited when (Ratio of RebD:Ratio of RebM) is, for example, (2.6% or more: 0.4% or more).
- the upper limit of the ratio of RebD per unit mass of dried leaves is not particularly limited, but may be, for example, 20%, 15%, 10%, etc., and the upper limit of the ratio of RebM is not particularly limited, but is 10%, 5%. It may be 3% or the like.
- containing 3.7% or more in total of RebD and RebM per unit mass of dry leaf means, for example, that of RebD and RebM contained in dry leaf of a predetermined mass (for example, 50 mg). It means that the total mass is 3.7% by mass or more (for example, 1.85 mg or more).
- the total ratio of RebD and RebM per unit mass of dried leaves in this embodiment is not limited and is, for example, 3.7% or more, 3.8% or more, 3.9% or more, 4.0% or more, 4.1% or more, 4.2% or more, 4.3% or more, 4.4% or more, 4.5% or more, 4.6% or more, 4.7% or more, 4.8% or more, 4.
- the upper limit of the total ratio of RebD and RebM per unit mass of dried leaves is not particularly limited, but may be, for example, 25%, 20%, 15%.
- the total mass ratio of RebD and RebM to the total steviol glycoside is 37.8% or more, for example, RebD and RebM contained in leaves (for example, dry leaves or fresh leaves).
- the total mass of RebD+RebM/TSG% is expressed as a ratio with respect to the total mass of steviol glycosides obtained from leaves, it means that the value of RebD+RebM/TSG is 37.8% or more.
- the value of RebD+RebM/TSG in this embodiment is not limited and is, for example, 37.8% or more, 37.9% or more, 38.0% or more, 38.1% or more, 38.2% or more, 38.3.
- % Or more 38.4% or more, 38.5% or more, 38.6% or more, 38.7% or more, 38.8% or more, 38.9% or more, 39.0% or more, 39.2% or more. , 39.4% or more, 39.6% or more, 39.8% or more, 40.0% or more, 40.2% or more, 40.4% or more, 40.6% or more, 40.8% or more, 41 0.0% or more, 41.2% or more, 41.4% or more, 41.6% or more, 41.8% or more, 42.0% or more, 42.4% or more, 42.8% or more, 43.2.
- the upper limit of the mass ratio of RebD+RebM to the total steviol glycoside is not particularly limited, but may be, for example, 85%, 75%, 65%, 55%.
- the Stevia plant of the present invention has a genetic characteristic that is homozygous for an allele in which the base at the position corresponding to position 201 of SEQ ID NO: 1 is A (hereinafter, referred to as “genetic characteristic A of the present invention A Sometimes referred to as ").
- the Stevia plant of the present invention may be referred to as at least one of the following (B-1) to (B-4) genetic characteristics (hereinafter, referred to as "genetic characteristic B of the present invention”). ) Has. (B-1) It is homozygous for the allele in which the base at the position corresponding to position 40 of SEQ ID NO: 2 is T (hereinafter, may be referred to as "genetic feature B-1 of the present invention”).
- (B-2) It is homozygous for the allele in which the base at the position corresponding to position 44 of SEQ ID NO: 3 is T (hereinafter, may be referred to as "genetic feature B-2 of the present invention”).
- (B-3) It is homozygous for the allele in which the base at the position corresponding to position 41 of SEQ ID NO: 4 is C (hereinafter sometimes referred to as “genetic feature B-3 of the present invention”).
- (B-4) Homozygous for an allele lacking the portion corresponding to positions 55 to 72 of SEQ ID NO: 5 (hereinafter sometimes referred to as "genetic feature B-4 of the present invention”) ..
- the Stevia plant of the present invention has a genetic feature that is heterozygous for an allele in which the base at the position corresponding to position 49 of SEQ ID NO: 6 is A (hereinafter, referred to as “genetic feature of the present invention”). Sometimes referred to as "C").
- the Stevia plant of the present invention has the genetic characteristic A of the present invention and the genetic characteristic B (that is, at least one of the genetic characteristics B-1 to B-4 of the present invention).
- the Stevia plant of the present invention has the genetic characteristic A and the genetic characteristic C of the present invention.
- the Stevia plant of the present invention has the genetic characteristic B and the genetic characteristic C of the present invention.
- the Stevia plant of the invention has all of the genetic features AC of the invention.
- “Position (or part) corresponding to” means a position in the sequence present in the genome when a sequence identical to the reference sequence (eg, SEQ ID NOs: 1 to 6) is present in the genome, or A portion (eg, 201st, 40th, 44th, 41st, 55th to 72nd, 49th, etc.), and if the same sequence as the reference sequence does not exist in the genome, the reference sequence in the genome It means a position or part in the corresponding sequence that corresponds to a position or part in the reference sequence.
- a sequence identical to the reference sequence eg, SEQ ID NOs: 1 to 6
- a portion eg, 201st, 40th, 44th, 41st, 55th to 72nd, 49th, etc.
- Whether there is a sequence identical to or equivalent to the reference sequence in the genome is determined by, for example, amplifying the target DNA of Stevia plant with a primer capable of amplifying the reference sequence by PCR, and sequencing the amplified products. It can be determined by performing alignment analysis of the obtained sequence and the reference sequence.
- sequences corresponding to the reference sequence include, for example, 60% or more, 70% or more, 75% or more, 80% or more, 81% or more, 82% or more, 83% or more, 84% or more with respect to the reference sequence.
- a base sequence having The position or portion corresponding to the position or portion in the reference sequence in the sequence corresponding to the reference sequence in the genome can be determined in consideration of the nucleotide sequences before and after the position or portion in the reference sequence.
- a position or a portion corresponding to a position or a portion in the reference sequence in a sequence corresponding to the reference sequence in the genome by alignment analysis of the reference sequence and a sequence corresponding to the reference sequence in the genome. it can.
- the genome of the Stevia plant has a portion having the same nucleotide sequence as SEQ ID NO: 1.
- the “position corresponding to the 201st position of SEQ ID NO: 1” is the 201st position from the 5′ side of the part consisting of the same nucleotide sequence as the SEQ ID NO: 1 in the genome.
- the genome of the Stevia plant when the genome of the Stevia plant is not the same as SEQ ID NO: 1 but has a part consisting of the corresponding nucleotide sequence, the genome does not have a part consisting of the same nucleotide sequence as SEQ ID NO: 1,
- the "position corresponding to the 201st position of SEQ ID NO: 1" does not necessarily correspond to the 201st position from the 5'side of the portion corresponding to the SEQ ID NO: 1, but includes the nucleotide sequence before and after the 201st position of SEQ ID NO: 1 and the like. Taking this into consideration, the "position corresponding to the 201st position of SEQ ID NO: 1" in the genome of such Stevia plant can be specified.
- the “position corresponding to position 201 of SEQ ID NO: 1” in the genome of Stevia plant is identified by alignment analysis of the base sequence of the part corresponding to SEQ ID NO: 1 in the genome of Stevia plant and the base sequence of SEQ ID NO: 1. can do.
- a portion consisting of a base sequence corresponding to SEQ ID NO: 1 means, for example, 60% or more, 70% or more, 75% or more, 80% or more, 81% or more, 82% or more, with respect to the base sequence of SEQ ID NO: 1. 83% or more, 84% or more, 85% or more, 86% or more, 87% or more, 88% or more, 89% or more, 90% or more, 91% or more, 92% or more, 93% or more, 94% or more, 95% Or more, 96% or more, 97% or more, 98% or more, 98.1% or more, 98.4% or more, 98.7% or more, 99% or more, 99.2% or more, 99.5% or more or 99. It means a portion consisting of a nucleotide sequence having a sequence identity of 8% or more.
- the "portion consisting of the base sequence corresponding to SEQ ID NO: 1" includes a forward primer that hybridizes to a complementary sequence of a portion 15 to 25 bases in length from the 5'end of SEQ ID NO: 1, and a SEQ ID NO: A portion of the genome of Stevia plant that can be amplified by PCR using a reverse primer that hybridizes to a portion having a length of 15 to 25 bases from the 3'end side of 1 is included.
- the genetic feature A of the present invention has been described as an example for simplification, but the same applies to the genetic features B (including genetic features B-1 to B-4) and C of the present invention.
- the “portion consisting of the base sequence corresponding to SEQ ID NO: 1” is, for example, a PCR using a forward primer containing the base sequence of SEQ ID NO: 7 and a reverse primer containing the base sequence of SEQ ID NO: 8.
- the part of the genome of the Stevia plant that can be amplified by the "portion consisting of the base sequence corresponding to SEQ ID NO: 2" is, for example, a PCR using a forward primer containing the base sequence of SEQ ID NO: 9 and a reverse primer containing the base sequence of SEQ ID NO: 10.
- the “portion consisting of the base sequence corresponding to SEQ ID NO: 3” is, for example, a PCR using a forward primer containing the base sequence of SEQ ID NO: 11 and a reverse primer containing the base sequence of SEQ ID NO: 12.
- the part of the genome of the Stevia plant that can be amplified by In a specific embodiment, the "portion consisting of the base sequence corresponding to SEQ ID NO: 4" is, for example, a PCR using a forward primer containing the base sequence of SEQ ID NO: 13 and a reverse primer containing the base sequence of SEQ ID NO: 14.
- the "portion consisting of the base sequence corresponding to SEQ ID NO: 5" is, for example, a PCR using a forward primer containing the base sequence of SEQ ID NO: 15 and a reverse primer containing the base sequence of SEQ ID NO: 16.
- the part of the genome of the Stevia plant that can be amplified by the "portion consisting of the base sequence corresponding to SEQ ID NO: 6" is, for example, a PCR using a forward primer containing the base sequence of SEQ ID NO: 17 and a reverse primer containing the base sequence of SEQ ID NO: 18.
- the “allele in which the base at the position corresponding to position 201 of SEQ ID NO: 1 is A” includes the base sequence of SEQ ID NO: 19, 20 or 21.
- the “allele in which the base at the position corresponding to the 40th position of SEQ ID NO: 2 is T” includes the base sequence of SEQ ID NO: 22, 23, or 24.
- the “allele in which the base at the position corresponding to position 44 of SEQ ID NO: 3 is T” includes the base sequence of SEQ ID NO: 25, 26 or 27.
- the “allele in which the base at the position corresponding to position 41 of SEQ ID NO: 4 is C” includes the base sequence of SEQ ID NO: 28, 29 or 30.
- the “allele lacking the portion corresponding to positions 55 to 72 of SEQ ID NO: 5” comprises the nucleotide sequence of SEQ ID NO: 31, 32 or 33.
- the “allele in which the base at the position corresponding to position 49 of SEQ ID NO: 6 is A” includes the base sequence of SEQ ID NO: 34, 35 or 36.
- (A) a position corresponding to position 201 of SEQ ID NO: 1, (B-1) a position corresponding to position 40 of SEQ ID NO: 2, (B-2) a position corresponding to position 44 of SEQ ID NO: 3, B-3) A group consisting of a position corresponding to position 41 of SEQ ID NO: 4, a part corresponding to positions 55 to 72 of (B-4) SEQ ID NO: 5, and a position corresponding to position 49 of SEQ ID NO: 6.
- the positions selected from may be collectively referred to as the “polymorphic site of the present invention” or the “mutation site of the present invention”.
- the above-mentioned genetic characteristics are PCR method, TaqMan PCR method, sequencing method, microarray method, invader method, TILLING method, RAD (random amplified polymorphic DNA) method, restriction enzyme fragment length polymorphism (RFLP) method, PCR-SSCP method.
- AFLP amplified fragment length polymorphism
- SSLP simple sequence length polymorphism
- CAPS cleaved amplified polymorphic sequence
- dCAPS derived cleaved amplified polymorphic sequence
- ASO allele-specific oligonucleotide
- ARMS Denaturant gradient gel electrophoresis
- CCM chemical cleavage of mismatch
- DOL DOL
- MALDI-TOF/MS MALDI-TOF/MS method
- TDI method padlock probe method
- molecular beacon method DASH (dynamic allele specific hybridization) Method
- UCAN method ECA method
- PINPOINT method PROBE (primeroligo base extension) method
- VSET very short extension
- Survivorassay Sniper assay
- Luminex assay GOOD method
- LCx method LCx method
- SNaPshot method MassARRAY method It can be detected by the pyrosequencing method
- the genetic features of the invention can be detected with the following primer set and restriction enzyme combinations.
- PCR is performed on the genomic DNA of the candidate plant using a forward primer having the base sequence shown in SEQ ID NO: 37 and a reverse primer having the base sequence shown in SEQ ID NO: 38.
- the resulting PCR product (about 196 bp long) (for example, SEQ ID NO: 39 or 40) was treated with the restriction enzyme Hpy188I, a band of about 96 bp long (for example, SEQ ID NO: 41) and about 100 bp long were obtained.
- Band for example, SEQ ID NO: 42
- a restriction enzyme-treated product of about 43 bp eg, SEQ ID NO:43
- 57 bp eg, SEQ ID NO:44
- a forward primer having the base sequence shown in SEQ ID NO: 45 and a reverse primer having the base sequence shown in SEQ ID NO: 46 are used for the genomic DNA of the candidate plant.
- PCR amplification of the obtained PCR product (about 297 bp long, for example, SEQ ID NO:47 or 48) gives only a band of about 297 bp long (for example, SEQ ID NO:47) even if KpnI restriction enzyme treatment is performed. ..
- a restriction enzyme digestion product of about 258 bp eg, SEQ ID NO:49
- a forward primer having the base sequence shown in SEQ ID NO: 50 and a reverse primer having the base sequence shown in SEQ ID NO: 51 are used for the genomic DNA of the candidate plant.
- PCR is carried out, and the obtained PCR product (about 383 bp long, for example, SEQ ID NO: 52 or 53) is treated with XbaI restriction enzyme to obtain only a band about 383 bp long (for example, SEQ ID NO: 52).
- the candidate plant does not have the genetic characteristic B-2.
- a forward primer having the base sequence shown in SEQ ID NO: 55 and a reverse primer having the base sequence shown in SEQ ID NO: 56 are used for the genomic DNA of the candidate plant.
- PCR amplification of the obtained PCR product (about 390 bp long, for example, SEQ ID NO: 57 or 58) gives a band of about 390 bp long (for example, SEQ ID NO: 57) even if AflII restriction enzyme treatment is performed. ..
- a restriction enzyme digestion product of about 347 bp eg, SEQ ID NO:59
- PCR is performed on the genomic DNA of the candidate plant using a forward primer having the base sequence shown in SEQ ID NO: 60 and a reverse primer having the base sequence shown in SEQ ID NO: 61. Amplification yields only a PCR product of approximately 140 bp (eg SEQ ID NO:62). On the other hand, if a 140 bp (eg, SEQ ID NO:62) and 158 bp (eg, SEQ ID NO:63) PCR product is produced, then the candidate plant does not have the genetic feature B-4.
- a 140 bp eg, SEQ ID NO:62
- 158 bp eg, SEQ ID NO:63
- PCR is performed on the genomic DNA of the candidate plant using a forward primer having the base sequence shown in SEQ ID NO: 64 and a reverse primer having the base sequence shown in SEQ ID NO: 65.
- amplification is performed and the obtained PCR product (about 367 bp length, for example, SEQ ID NO: 66 or 67) is treated with a restriction enzyme SpeI, about 367 bp length (for example, SEQ ID NO: 66) and about 321 bp length (for example, sequence No. 68) is obtained.
- a restriction enzyme treatment product of about 367 bp for example, SEQ ID NO: 67
- “about” means ⁇ 5 bp.
- the restriction enzyme treatment can be performed according to the conditions recommended by the vendor of each restriction enzyme used.
- Steviol glycosides such as RebD and M are extracted by reacting fresh or dried leaves of the plant of the present invention with a suitable solvent (aqueous solvent such as water or organic solvent such as alcohol, ether and acetone). Can be extracted in the state of.
- a suitable solvent aqueous solvent such as water or organic solvent such as alcohol, ether and acetone.
- aqueous solvent such as water or organic solvent such as alcohol, ether and acetone
- a gradient of ethyl acetate or other organic solvent water, high performance liquid chromatography (HPLC), gas chromatography, time-of-flight mass spectrometry (Time- Purification of individual steviol glycosides such as RebD and M by using known methods such as of-Flight mass spectrometry (TOF-MS) and Ultra (High) Performance Liquid chromatography (UPLC).
- HPLC high performance liquid chromatography
- HPLC high performance liquid chromatography
- gas chromatography gas chromatography
- time-of-flight mass spectrometry Time- Purification of individual steviol glycosides such as RebD and M by using known methods such as of-Flight mass spectrometry (TOF-MS) and Ultra (High) Performance Liquid chromatography (UPLC).
- the content of steviol glycosides such as RebD and M can be determined according to the method described in Ohta, et al., J.Appl. Glycosci., Vol.57, No.3 (2010) or WO2010/038911, and the examples described later. It can be measured by the described method. Specifically, it can be measured by sampling fresh leaves from the Stevia plant of the present invention and performing LC/MS-MS.
- the plant of the present invention includes not only the whole plant but also plant organs (eg, leaves, petals, stems, roots, seeds, etc.), plant tissues (eg, epidermis, phloem, parenchyma, xylem, vascular bundles, fences). Tissue, spongy tissue, etc.) or various forms of plant cells (eg, suspension culture cells), protoplasts, leaf sections, callus, and the like.
- the leaves may also be the dry leaves mentioned above.
- the plant of the present invention may also include tissue culture or plant culture cells. This is because the plant body can be regenerated by culturing such a tissue culture or plant culture cell.
- tissue culture or plant culture cells of the plant of the present invention include embryos, meristem cells, pollen, leaves, roots, root tips, petals, protoplasts, leaf sections and callus, and the like. It is not limited.
- the present invention comprises the following characteristics (1) to (4), which comprises a step of crossing the Stevia plant of the present invention with a second Stevia plant.
- the present invention provides a method for producing a Stevia plant having a high RebD content, which comprises at least one of the following (hereinafter sometimes referred to as "the production method of the present invention”). (1) It contains 3.3% or more of RebD per unit mass of dried leaf. (2) It contains 2.6% or more of RebD and 0.4% or more of RebM per unit mass of dry leaf. (3) The total amount of RebD and RebM is 3.7% or more per unit mass of dried leaves. (4) The total mass ratio of RebD and RebM to the total steviol glycoside is 37.8% or more.
- the high RebD-containing Stevia plant produced by the method has the same phenotype and genetic properties as the plant of the present invention.
- RebD, RebM the range of the total amount of RebD and RebM, the range of the ratio of the total amount of RebD, RebD and RebM to the total steviol glycoside amount in the plant obtained by the production method of the present invention,
- the plant body is as described above.
- the plant obtained by the production method of the present invention has the genetic characteristic A of the present invention.
- the plant obtained by the production method of the present invention has the genetic characteristic B of the present invention (that is, at least one of the genetic characteristics B-1 to B-4 of the present invention).
- the plant obtained by the production method of the present invention has the genetic characteristic C of the present invention.
- the plant obtained by the production method of the present invention comprises the genetic feature A of the present invention and the genetic feature B (that is, at least one of the genetic features B-1 to B-4 of the present invention).
- the plant obtained by the production method of the present invention has the genetic characteristic A and the genetic characteristic C of the present invention.
- the plant obtained by the production method of the present invention has the genetic characteristic B and the genetic characteristic C of the present invention.
- the plant obtained by the production method of the present invention has all of the genetic characteristics A to C of the present invention.
- crossing means crossing the plant body of the present invention (first generation (S1)) with the second plant body (S1) to obtain its offspring (the present invention). Means to obtain a plant body (second generation (S2)) produced by the production method of 1.
- the backcross is preferable as the crossing method.
- the "backcross” means the plant of the present invention and the second The progeny of the present invention (S2) is further crossed with the plant of the present invention (that is, a plant having the genetic characteristics of the present invention) (S1) to give the genetic characteristics of the present invention.
- the second plant (S1) used in the production method of the present invention has the same phenotype and genetic properties as the plant of the present invention, it is substantially effective.
- the gene polymorphism of the present invention is inherited according to Mendelian's law, and a phenotype correlated with the gene polymorphism, that is, a phenotype of high RebD content is also inherited according to Mendelian's law.
- the plant of the present invention can be produced by selfing. Self-pollination can be performed by allowing the pistil of the plant of the present invention to self-pollinate the pollen of the stamen of the plant of the present invention.
- the plant produced by the producing method of the present invention has the same phenotype and genetic characteristics as the plant of the present invention. Therefore, the plant produced by the producing method of the present invention is further a third Stevia plant. It is also possible to produce a Stevia plant having a phenotype equivalent to that of the plant of the present invention by crossing with.
- the plant of the present invention can be produced by regenerating the plant by culturing the above-described tissue culture or plant culture cells.
- the culture conditions are the same as the conditions for culturing tissue cultures or plant culture cells of wild-type Stevia plants, and are known (Protocols for In Vitro cultures and secondary metabolite analysis of aromatic and medicalinal plants, Method in molecular biology, vo. 1391, pp113-123).
- the plant of the present invention can be created by introducing the mutation of the present invention into the genome of Stevia plant.
- the mutation may be introduced by a gene recombination technique or a non-gene recombination technique.
- Examples of the “non-genetically recombinant method” include a method of inducing a mutation in a gene of a host cell (or a host plant) without introducing a foreign gene. Examples of such a method include a method of acting a mutagen of a plant cell. Examples of such a mutagen include ethyl methane sulfonic acid (EMS) and sodium azide.
- EMS ethyl methane sulfonic acid
- ethyl methane sulfonic acid is 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8% , 0.9%, 1.0%, etc. can be used to treat plant cells.
- the treatment time is 1 to 48 hours, 2 to 36 hours, 3 to 30 hours, 4 to 28 hours, 5 to 26 hours, and 6 to 24 hours.
- the treatment procedure itself is known, it can be carried out by immersing the water-absorbed seeds that have undergone the water absorption process in the treatment liquid containing the mutagen at the above concentration for the above treatment time.
- a method of irradiating a plant cell with radiation such as X-rays, ⁇ -rays, and ultraviolet rays can be used.
- cells irradiated with an appropriate amount of ultraviolet irradiation are cultured in a selective medium or the like, and then cells, callus, or plants having the desired trait can be selected. ..
- the irradiation intensity at that time is 0.01 to 100 Gr, 0.03 to 75 Gr, 0.05 to 50 Gr, 0.07 to 25 Gr, 0.09 to 20 Gr, 0.1 to 15 Gr, 0.1 to 10 Gr, 0.
- 5 to 10 Gr, 1 to 10 Gr, irradiation distance is 1 cm to 200 m, 5 cm to 100 m, 7 cm to 75 m, 9 cm to 50 m, 10 cm to 30 m, 10 cm to 20 m, 10 cm to 10 m, irradiation time is 1 minute to 2 The period is 2 minutes to 1 year, 3 minutes to 0.5 year, 4 minutes to 1 month, 5 minutes to 2 weeks, 10 minutes to 1 week.
- the irradiation intensity, distance, and time vary depending on the type of radiation and the state (cell, callus, plant) to be irradiated, but can be appropriately adjusted by those skilled in the art.
- plant cells may undergo mutation during culturing, and therefore it is preferable to return them to individual plants for more stable trait maintenance.
- the plant of the present invention is used as a host for subsequent gene recombination (for example, by genome editing) to obtain a plant (for example, the plant of the present invention is used as a host for gene recombination, and another trait is obtained).
- the added plants are not excluded from the scope of the present invention.
- a plant having the same phenotype and genetic properties as the plant of the present invention and the plant of the present invention is obtained by detecting the genetic characteristic of the present invention from the tissue of the plant. Can be screened.
- “screening” means identifying the plant of the present invention from other plants and selecting the plant of the present invention.
- the present invention in another aspect, screens a high RebD-containing Stevia plant comprising detecting the presence and/or absence of at least one of the genetic features AC of the present invention from the genome of a test plant.
- a method hereinafter sometimes referred to as “screening method of the present invention”.
- the genetic feature to be detected is the genetic feature A of the present invention.
- the genetic feature to be detected is genetic feature B of the present invention (that is, at least one of genetic features B-1 to B-4 of the present invention).
- the genetic feature to be detected is genetic feature C of the present invention.
- the genetic features to be detected are the genetic feature A and the genetic feature B of the present invention (that is, at least one of the genetic features B-1 to B-4 of the present invention).
- the genetic features to be detected are genetic feature A and genetic feature C of the present invention.
- the genetic features to be detected are genetic feature B and genetic feature C of the present invention.
- the genetic features to be detected are all of the genetic features A to C of the present invention.
- the screening method of the present invention may further include a step of selecting, from test plants, a plant in which the presence of at least one of the above genetic characteristics is detected.
- the presence of the genetic features of the invention is (A) an allele in which the base at the position corresponding to position 201 of SEQ ID NO: 1 is A (for example, an allele containing the base sequence of SEQ ID NO: 69), (B-1) an allele in which the base at the position corresponding to position 40 of SEQ ID NO: 2 is T (for example, an allele containing the base sequence of SEQ ID NO: 70), (B-2) an allele in which the base at the position corresponding to position 44 of SEQ ID NO: 3 is T (for example, an allele containing the base sequence of SEQ ID NO: 71), (B-3) an allele in which the base at the position corresponding to position 41 of SEQ ID NO: 4 is C (for example, an allele containing the base sequence of SEQ ID NO: 72), (B-4) an allele lacking a portion corresponding to positions 55 to 72 of SEQ ID NO: 5 (for example, an allele containing the nucleotide sequence of SEQ ID NO: 73),
- the absence of the genetic features of the present invention is (A) an allele in which the base at the position corresponding to position 201 of SEQ ID NO: 1 is A (for example, an allele containing the base sequence of SEQ ID NO: 69), (B-1) an allele in which the base at the position corresponding to position 40 of SEQ ID NO: 2 is T (for example, an allele containing the base sequence of SEQ ID NO: 70), (B-2) an allele in which the base at the position corresponding to position 44 of SEQ ID NO: 3 is T (for example, an allele containing the base sequence of SEQ ID NO: 71), (B-3) an allele in which the base at the position corresponding to position 41 of SEQ ID NO: 4 is C (for example, an allele containing the base sequence of SEQ ID NO: 72), (B-4) an allele lacking a portion corresponding to positions 55 to 72 of SEQ ID NO: 5 (for example, an allele containing the nucleotide sequence of SEQ ID NO: 73
- Specific examples of the method for detecting genetic characteristics of the present invention include PCR method, TaqMan PCR method, sequencing method, microarray method, invader method, TILLING method, RAD method, RFLP method, PCR-SSCP method, AFLP method, SSLP method.
- CAPS method CAPS method, dCAPS method, ASO method, ARMS method, DGGE method, CCM method, DOL method, MALDI-TOF/MS method, TDI method, padlock probe method, molecular beacon method, DASH method, UCAN method, ECA method, PINPOINT Method, PROBE method, VSET method, Survivor assay, Sniper assay, Luminex assay, GOOD method, LCx method, SNaPshot method, Mass ARRAY method, pyrosequencing method, SNP-IT method, melting curve analysis method, etc. It is not limited to.
- a primer having a 3'terminal portion having a sequence complementary to the polymorphic site of the present invention it is preferable to prepare a primer having a 3'terminal portion having a sequence complementary to the polymorphic site of the present invention.
- the primer designed in this way when the sample serving as a template has a polymorphism, the primer completely hybridizes to the template, and thus the polymerase extension reaction proceeds, but the template has the mutation of the present invention. Otherwise, the nucleotides at the 3'end of the primer will mismatch the template and the extension reaction will not occur.
- the primer sequence is designed so that the polymorphism of the present invention and the primer sequence do not overlap, and the gene mutation of the present invention can be PCR-amplified, and the base sequence of the amplified nucleotide fragment is sequenced.
- the genetic characteristic of the present invention can be detected.
- the TaqMan PCR method is a method utilizing a fluorescently labeled allele-specific oligo and a PCR reaction with Taq DNA polymerase (Livak, KJ Genet. Anal. 14, 143 (1999); Morris T. et al., J. Clin. Microbiol. 34, 2933 (1996)).
- the sequence method is a method of analyzing the presence or absence of a mutation by amplifying a region containing the mutation by PCR and sequencing the DNA sequence using a Dye Terminator or the like (Sambrook, Fritsch and Maniatis, “Molecular Cloning: A Laboratory Manual” 2nd Edition (1989), Cold Spring Harbor Laboratory Press).
- the DNA microarray is one in which one end of a nucleotide probe is fixed in an array on a support, and includes a DNA chip, a Gene chip, a microchip, a bead array and the like.
- the presence or absence of the polymorphism of the present invention can be comprehensively detected by using a probe containing a sequence complementary to the polymorphism of the present invention.
- GeneChip assay is mentioned as a DNA microarray assay such as a DNA chip (see Affymetrix; US Pat. Nos. 6,045,996, 5,925,525, and 5,858,659).
- GeneChip technology utilizes miniaturized, high-density microarrays of oligonucleotide probes attached to the chip.
- the invader method is a special method in which two types of reporter probes and one type of invader probe specific to each allele of polymorphism such as SNP are hybridized with template DNA and the DNA structure is recognized and cleaved.
- This is a method that combines the cleavage of DNA with a Cleavase enzyme having endonuclease activity (Livak, KJ Biomol. Eng. 14, 143-149 (1999); Morris T. et al., J. Clin. Microbiol. 34, 2933. (1996); Lyamichev, V. et al., Science, 260, 778-783 (1993)).
- the TILLING (Targeting Induced Local Lesions IN Genomes) method is a method for screening a mutation mismatch in the genome of a mutant population having a mutation introduced therein by PCR amplification and CEL I nuclease treatment.
- the genetic feature A of the present invention includes, without limitation, a primer set capable of amplifying a region containing a sequence set forth in any one of SEQ ID NOs: 19-21 and a polyset of SEQ ID NOs: 19-21.
- a restriction enzyme that cleaves nucleotides but does not cleave the polynucleotides of SEQ ID NOs: 75-77 or a polynucleotide of SEQ ID NOs: 19-21 but does cleave a polynucleotide of SEQ ID NOs: 75-77 (eg, Hpy188I ) And can be detected by the CAPS method.
- Non-limiting examples of primer sets include the following. Forward primer: ATGGTTTGGGAATAGCTCTGTTGTT (SEQ ID NO: 37)
- Reverse primer AGAACTTTGTTCTTGAACCTCTTG (SEQ ID NO: 38)
- the genetic feature B of the present invention can be detected by the dCAPS method using the following primer set and restriction enzyme without limitation.
- B-1 A primer set containing a forward primer containing the base sequence shown in SEQ ID NO: 45 and a reverse primer containing the base sequence shown in SEQ ID NO: 46
- B-2 a primer set containing a forward primer containing the base sequence shown in SEQ ID NO: 50 and a reverse primer containing the base sequence shown in SEQ ID NO: 51
- B-3 A primer set containing a forward primer containing the nucleotide sequence shown in SEQ ID NO: 55 and a reverse primer containing the nucleotide sequence shown in SEQ ID NO: 56, or
- B-4) a forward containing the nucleotide sequence shown in SEQ ID NO: 60.
- a primer set comprising a primer and a reverse primer containing the base sequence shown in SEQ ID NO: 61.
- the primer set is not limited to those having the sequences of SEQ ID NOs: 45, 46, 50, 51, 55, 56, 60 or 61.
- Any reverse primer may be used as long as it has a sequence from the 3'end to 15 bases upstream (see the table below) at the 3'end, and as a reverse primer, from the 3'end of SEQ ID NO: 46, 51, 56 or 61 to 15 bases upstream. As long as it has the sequence (see the table below) at the 3'end.
- Such primers may be 15 to 50 bases long, 20 to 45 bases long.
- the primer set is not limited to those having the sequences of SEQ ID NOs: 45, 46, 50, 51, 55, 56, 60 or 61.
- any of SEQ ID NOS: 45, 50, 55 or 60 may be used.
- the reverse primer may have or include a sequence of 15 or more consecutive bases in SEQ ID NO: 46, 51, 56 or 61. ..
- a primer comprising a forward primer having or including a sequence of 15 consecutive bases or more in SEQ ID NO: 45 and a reverse primer having a sequence of 15 consecutive bases or more in SEQ ID NO: 46 set
- B-2′′ a primer including a forward primer having or including a sequence of 15 consecutive or more bases in SEQ ID NO: 50 and a reverse primer having a sequence of 15 consecutive or more bases in SEQ ID NO: 51 set
- B-3′′ A primer comprising a forward primer having or including a sequence of 15 consecutive or more bases in SEQ ID NO: 55 and a reverse primer having a sequence of 15 consecutive or more bases in SEQ ID NO: 56 Set
- B-4′′ a forward primer having or including a sequence of 15 or more consecutive bases in SEQ ID NO: 60 and a reverse primer having or including a sequence of 15 or more consecutive bases in SEQ ID NO: 61 Including, primer set.
- Such a primer may have a length of 15 to 50 bases, 20 to 45 bases, or 30 to 65 bases as
- restriction enzymes to be combined with the above-mentioned primers include the following.
- the genetic feature C of the present invention can be detected by the dCAPS method using the following primer set and restriction enzyme.
- Primer set A sequence selected from SEQ ID NOs: 86-109 located at the 3'end, and optionally a contiguous sequence continuing from position 28 to 5'of SEQ ID NO: 6 added to the 5'end of said sequence (eg, , A contiguous sequence of any length) and a sequence complementary to any contiguous sequence of 20 bases or more located on the 3'side of position 50 of SEQ ID NO: 6 (for example, SEQ ID NO: 65). , 110) and a reverse primer.
- the primer sequence can be optimized within the range satisfying the above conditions.
- each of the above primers may have a length of 15 to 50 bases, a length of 18 to 48 bases, a length of 20 to 45 bases, a length of 30 to 65 bases, and the like.
- ⁇ Restriction enzyme The restriction enzymes corresponding to each of SEQ ID NOs: 86 to 109 are shown below. In the following sequences, “R” represents A or G and “Y” represents C or T.
- the genetic feature C of the present invention can be detected by the dCAPS method using the following primer set and restriction enzyme.
- the screening method of the present invention may further include the step of measuring the RebD content of the tissue (eg, leaf) of the test Stevia plant in which the genetic characteristic of the present invention has been detected.
- the measurement of the RebD content is as described in the section of the plant of the present invention.
- an individual having a high RebD content is selected, and this is crossed with another stevia plant to obtain the offspring.
- the screening method of the present invention may be applied to plants. Therefore, the screening method of the present invention may include one or more of the following steps.
- the individuals having a high RebD content are, for example, among the test Stevia plants in which the genetic characteristics of the present invention have been detected, the highest RebD content is in the top 50%, the top 40%, and the top 30. %, top 20%, top 10%, top 5%, top 4%, top 3%, top 2% or top 1%, and the like. Further, other Stevia plants to be crossed may or may not include the genetic characteristic of the present invention. In the above aspect, steps (iv) to (vii) can be repeated multiple times. In this way, Stevia plants with a higher RebD content can be screened.
- the test stevia plant may be a natural plant or a non-genetically recombinant plant.
- the non-transgenic plant is as described in the section of the plant of the present invention.
- the test stevia plant may include a mutagenized stevia plant and its progeny plant.
- the mutagenesis treatment is as described in the section of the plant body of the present invention, and includes treatment with a mutagen, irradiation with radiation or light, and the like.
- the present invention also provides a primer set described above, for example, a primer set containing the forward primer of SEQ ID NO: 37 and the reverse primer of SEQ ID NO: 38, (B-1) to (B-4), B-1′) to (B-4′) and (B-1′′) to (B-4′′), and one or more primer sets selected from the group and/or the above table.
- the primer set described in 2 to 3 is provided.
- the present invention further comprises a primer set capable of amplifying a region having a base sequence selected from the group consisting of SEQ ID NOs: 1 to 6 and 69 to 74 by PCR, for example, a forward primer containing the base sequence of SEQ ID NO: 7, A primer set with a reverse primer containing the base sequence of SEQ ID NO:8, a forward primer containing the base sequence of SEQ ID NO:9, and a primer set with a reverse primer containing the base sequence of SEQ ID NO:10, containing the base sequence of SEQ ID NO:11 A primer set of a forward primer and a reverse primer containing the base sequence of SEQ ID NO: 12, a primer set of a forward primer containing the base sequence of SEQ ID NO: 13, and a reverse primer containing the base sequence of SEQ ID NO: 14, A primer set consisting of a forward primer containing a base sequence and a reverse primer containing a base sequence of SEQ ID NO:16, a forward primer containing a base sequence of SEQ ID NO:17
- the present invention provides a probe capable of detecting the presence and/or absence of the genetic characteristic of the present invention (hereinafter, may be referred to as “probe of the present invention”).
- the probe of the present invention may have a structure suitable for various detection methods for the presence and/or absence of the genetic feature of the present invention.
- the probe of the present invention may contain a nucleotide sequence having complementarity to the part of the genome containing the mutation site of the present invention.
- Non-limiting examples of such probes include those containing a nucleotide sequence selected from SEQ ID NOs: 19 to 36, 75 to 77, 135 to 149.
- SEQ ID NOs: 19-36 are specific for alleles containing the mutation of the invention
- SEQ ID NOs: 75-77, 135-149 are specific for alleles not containing the mutation of the invention.
- the presence of the genetic feature of the present invention can be detected by detection of the allele containing the mutation of the present invention and/or non-detection of the allele not containing the mutation of the present invention, and the absence of the genetic feature of the present invention is It can be detected by non-detection of the allele containing the mutation of the present invention and/or detection of the allele not containing the mutation of the present invention.
- the probe of the present invention preferably has a label.
- Non-limiting examples of such labels include fluorescent labels, luminescent labels, radioactive labels, dyes, enzymes, quenchers, binding moieties to detectable labels and the like.
- the probe of the present invention has a base sequence selected from SEQ ID NOs: 19 to 36, 75 to 77, 135 to 149, and a label.
- the present invention further includes a primer set capable of amplifying a region containing the sequence of any of SEQ ID NOs: 19 to 21, for example, a forward primer containing the base sequence of SEQ ID NO: 7 and a base sequence of SEQ ID NO: 8.
- a kit including a restriction enzyme eg, Hpy188I
- a screening kit is provided.
- the present invention further includes the group consisting of (B-1) to (B-4), (B-1') to (B-4') and (B-1'') to (B-4'').
- a kit for example, a screening kit, containing any one or more primer sets selected from the above and optionally a restriction enzyme is provided. If any one or more primer sets selected from the group consisting of (B-1), (B-1′) and (B-1′′) is used in the kit, it is included in the kit.
- the restriction enzyme used is KpnI. In the kit, when any one or more primer sets selected from the group consisting of (B-2), (B-2′) and (B-2′′) is used, it is included in the kit.
- the restriction enzyme used is XbaI. If any one or more primer sets selected from the group consisting of (B-3), (B-3′) and (B-3′′) is used in the kit, it is included in the kit.
- the restriction enzyme used is AflII.
- the present invention further provides a kit including, for example, a screening kit containing a primer set containing the combination of the forward primer and the reverse primer shown in Tables 2 to 3 and a restriction enzyme corresponding thereto.
- the restriction enzyme includes KpnI
- the restriction enzyme contains XbaI
- the restriction enzyme includes AflII
- the present invention also provides a screening kit comprising a primer set capable of amplifying a region having a nucleotide sequence selected from the group consisting of SEQ ID NOs: 1 to 6 and 69 to 74 by PCR, and the probe of the present invention. ..
- primer sets, probes, and kits can be used for detecting the genetic characteristics of the present invention, used in the screening method of the present invention, and the like.
- instructions including detection of the genetic characteristics of the present invention and a description of the screening method of the present invention, for example, instructions for use, a medium recording information on the method of use, for example, A flexible disk, CD, DVD, Blu-ray disk, memory card, USB memory, etc. may be included.
- an extract is obtained from the plant of the present invention or seeds or leaves (for example, dried leaves or fresh leaves) of the plant.
- a method for producing a RebD-containing extract (hereinafter sometimes referred to as “the method for producing an extract of the present invention”) including the step of obtaining.
- a method for producing RebD (hereinafter, also referred to as “method for producing RebD of the present invention”), which comprises a step of purifying RebD from the extract obtained by the method for producing an extract of the present invention.
- the high RebD-containing stevia plant selected by the screening method of the present invention, or the high RebD-containing stevia plant produced by the method of the present invention RebD, RebM or
- a method for producing RebD, RebM, or both which comprises the step of obtaining an extract containing both.
- An extract containing RebD, RebM or both is obtained by reacting a fresh leaf or a dry leaf of the plant of the present invention with a suitable solvent (an aqueous solvent such as water or an organic solvent such as alcohol, ether and acetone). be able to.
- a suitable solvent an aqueous solvent such as water or an organic solvent such as alcohol, ether and acetone.
- an extract containing RebD, RebM, or both of them is extracted with ethyl acetate or another organic solvent:water gradient, high performance liquid chromatography (HPLC), gas chromatography, time-of-flight mass spectrometry (Time-of-flight).
- RebD, RebM, or both can be purified by using a known method such as -Flight mass spectrometry (TOF-MS) or Ultra (High) Performance Liquid chromatography (UPLC).
- the extract obtained by the method for producing an extract of the present invention contains RebD, RebM or both in a higher content than the wild-type Stevia species.
- the extract of the present invention has RebD, RebM or both of which are 300% or more, 400% or more, 500% or more, 600% or more, 700% or more, 800% or more, as compared with an extract obtained from a wild-type Stevia species.
- the content may be 4800% or higher, 4900% or higher, and 5000% or higher.
- the extract of the present invention and the extract obtained from the wild-type Stevia species may be obtained by the
- the RebD, RebM or both obtained by the method for producing the extract and/or the RebD or RebM of the present invention thus obtained are mixed with other components to give RebD, RebM.
- it is possible to produce a novel drug, a fragrance, or a food or drink with an increased content of both of them. Therefore, the present invention as another embodiment, a step of mixing the extract of the present invention and/or RebD, RebM or both of them obtained by the method for producing RebD, RebM of the present invention, and other components A method for producing a drug, a fragrance, or a food or drink is provided.
- the present invention provides a novel drug, fragrance or food or drink, which is obtained by the above-mentioned production method and has an increased content of RebD, RebM or both.
- the food and drink means beverages and foods. Therefore, in one embodiment, the present invention provides a novel drug, flavor, beverage or food, and a method for producing the drug, flavor, beverage or food.
- nucleotide sequence of plant of the present invention provides a nucleotide sequence of Stevia plant of the present invention.
- a specific embodiment of the nucleotide sequence of the Stevia plant having the genetic feature A of the present invention includes or consists of the nucleotide sequence selected from SEQ ID NOs: 19 to 21 and 69.
- a specific embodiment of the nucleotide sequence of the Stevia plant having the genetic characteristic B of the present invention is SEQ ID NOs: 22 to 33 and 70. Contains or consists of a nucleotide sequence selected from ⁇ 73.
- a specific embodiment of the base sequence of the Stevia plant having the genetic feature C of the present invention includes or consists of the base sequence selected from SEQ ID NOs: 34 to 36 and 74.
- Specific embodiments of the base sequence of the Stevia plant having the genetic characteristic A and the genetic characteristic B of the present invention include the nucleotide sequences selected from SEQ ID NOs: 19 to 21 and 69, and SEQ ID NOs: 22 to 33 and 70.
- Specific embodiments of the base sequence of the Stevia plant having the genetic characteristic A and the genetic characteristic C of the present invention include the nucleotide sequences selected from SEQ ID NOs: 19 to 21 and 69, and SEQ ID NOs: 34 to 36 and 74. And a base sequence selected from.
- a specific embodiment of the nucleotide sequence of the Stevia plant having the genetic characteristic B and the genetic characteristic C of the present invention is the nucleotide sequence selected from SEQ ID NOs:22 to 33 and 70 to 73, and SEQ ID NOs:34 to 36. And a nucleotide sequence selected from 74.
- a specific embodiment of the nucleotide sequence of the Stevia plant having all of the genetic features A to C of the present invention is that the nucleotide sequence selected from SEQ ID NOs: 19 to 21 and 69 and SEQ ID NOs: 22 to 33 and 70 to 73 It includes the base sequence selected and the base sequences selected from SEQ ID NOs: 34 to 36 and 74.
- Example 1 Production of high RebD stevia plants 1. Preparation of Test Lines A male strain (P1) having a high TSG-containing genetic characteristic and a female strain (P2) having a high RebM-containing genetic characteristic were crossed to obtain a hybrid first generation (S1 generation) seed. Were sown and sown in a greenhouse in the Suntory Research Center to obtain S1 generation seedlings.
- a high RebM-containing genetic trait has at least one of the following traits: B-1: Homozygous for an allele in which the base at the position corresponding to position 40 of SEQ ID NO: 2 is T. B-2: Homozygous for an allele in which the base at the position corresponding to position 44 of SEQ ID NO: 3 is T.
- B-3 Homozygous for the allele in which the base at the position corresponding to position 41 of SEQ ID NO: 4 is C.
- B-4 Homozygous for the allele lacking the portion corresponding to positions 55 to 72 of SEQ ID NO:5.
- the fact that these genetic characteristics are related to the high RebM content characteristic is shown in an unpublished prior application by the present applicant (PCT/JP2018/038064 filed on October 12, 2018).
- the genetic characteristics of the high TSG content type have the following characteristics.
- C Heterozygosity for the allele in which the base at the position corresponding to position 49 of SEQ ID NO: 6 is A.
- Genomic DNA was extracted from the fresh leaves of each individual tested in Example 1, and the possession status of genetic characteristics B-1 and C was investigated. ..
- PCR was carried out using the following primers, a restriction enzyme (KpnI) was added to the PCR product, an enzyme reaction was carried out at 37° C., and treatment with a restriction enzyme was carried out. After the restriction enzyme treatment, electrophoresis was performed using a microchip type electrophoresis apparatus LabChip GX Touch HT, and markers were identified by the band pattern after the electrophoresis.
- the primer sequences are as follows.
- Fw primer 5'-TAATCATCCAAACCCTAATCTCGCCAAACAACCGGGGTAC-3' (SEQ ID NO: 45)
- Rv primer 5'-GAGGAAGACATTGGGCAACTC-3' (SEQ ID NO: 46)
- SEQ ID NO: 49 a product which did not generate a restriction enzyme-treated product (for example, SEQ ID NO: 49) of about 260 bp was defined as genetic feature B-1 positive.
- PCR was performed using the following primers, a restriction enzyme (SpeI) was added to the PCR product, and the enzyme reaction was performed at 37°C. After treatment with a restriction enzyme, electrophoresis was performed using a microchip type electrophoresis apparatus LabChip GX Touch HT (PerkinElmer), and markers were identified by a band pattern after electrophoresis.
- SpeI restriction enzyme
- LabChip GX Touch HT PerkinElmer
- the present invention makes it possible to provide RebD more efficiently, by containing a sufficient amount of RebD, it is possible to provide pharmaceuticals, flavors, foods and drinks, etc. with high-quality taste.
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Abstract
Description
[1] 乾燥葉の単位質量当たり3.3%以上のRebDを含む、高レバウジオシドD(RebD)含有ステビア植物体。
[2]
配列番号1の201位に相当する位置の塩基がAであるアレルについてホモ接合性である、[1]に記載の植物体。
[3]
以下の遺伝的特徴の少なくとも1つをさらに有する、[1]又は[2]に記載の植物体。
(1)配列番号2の40位に相当する位置の塩基がTであるアレルについてホモ接合性である。
(2)配列番号3の44位に相当する位置の塩基がTであるアレルについてホモ接合性。
(3)配列番号4の41位に相当する位置の塩基がCであるアレルについてホモ接合性。
(4)配列番号5の55~72位に相当する部分が欠失しているアレルについてホモ接合性。
[4]
配列番号6の49位に相当する位置の塩基がAであるアレルについてヘテロ接合性である、[1]~[3]のいずれか一項に記載の植物体。
[5]
非遺伝子組換植物体である、[1]~[4]のいずれか一項に記載の植物体。
突然変異誘発処理を行ったステビア植物体及びその子孫植物体を含む、[1]~[5]のいずれか一項に記載の植物体。
[7] [1]~[6]のいずれか一項に記載の植物体の種子、組織、組織培養物又は細胞。
[8] 胚、分裂組織細胞、花粉、葉、根、根端、花弁、プロトプラスト、葉の切片及びカルスから選択される、[7]に記載の組織、組織培養物又は細胞。
[9] [1]~[6]のいずれか一項に記載の植物体と第2のステビア植物体とを交雑させる工程を含む、乾燥葉の単位質量当たり3.3 %以上のRebDを含む高RebD含有ステビア植物体を作出する方法。
[10] 第2の植物体が[1]~[5]のいずれか一項に記載の植物体である、[9]に記載の方法。
[11] RebDを含む、[1]~[6]のいずれか一項に記載の植物体、[7]又は[8]に記載の種子、組織、組織培養物又は細胞の抽出物。
[12] [1]~[6]のいずれか一項に記載の植物体、[7]又は[8]に記載の種子、組織、組織培養物又は細胞から抽出物を得る工程を含む、RebD含有抽出物の製造方法。
[13] [11]に記載の抽出物からRebDを精製する工程を含む、RebDの製造方法。
[14] [1]~[6]のいずれか一項に記載の植物体の抽出物、[7]又は[8]に記載の種子、組織、組織培養物又は細胞の抽出物、あるいは、[11]に記載の抽出物を提供する工程、及び
前記抽出物を、飲食品、甘味組成物、香料又は医薬品の原料に添加する工程
を含む、飲食品、甘味組成物、香料又は医薬品の製造方法。
[15] 被験ステビア植物体のゲノムから、配列番号1の201位に相当する位置の塩基がAであるアレルについてホモ接合性であるという遺伝的特徴の存在及び/又は不在を検出する工程を含む、高RebD含有ステビア植物体をスクリーニングする方法。
被験ステビア植物体のゲノムから以下の遺伝的特徴の少なくとも1つの存在及び/又は不在を検出する工程をさらに含む、[15]に記載の方法。
(1)配列番号2の40位に相当する位置の塩基がTであるアレルについてホモ接合性である。
(2)配列番号3の44位に相当する位置の塩基がTであるアレルについてホモ接合性。
(3)配列番号4の41位に相当する位置の塩基がCであるアレルについてホモ接合性。
(4)配列番号5の55~72位に相当する部分が欠失しているアレルについてホモ接合性。
[17]
被験ステビア植物体のゲノムから、配列番号6の49位に相当する位置の塩基がAであるアレルについてヘテロ接合性であるという遺伝的特徴の存在及び/又は不在を検出する工程をさらに含む、[15]又は[16]に記載の方法。
[18]
遺伝的特徴を検出する工程が、CAPS法、dCAPS法又はTaqMan PCR法を用いて行われる、[15]~[17]のいずれか一項に記載の方法。
[19] 被験ステビア植物組織の甘味成分の含有量を測定する工程をさらに含む、[15]~[18]のいずれか一項に記載の方法。
[20]
配列番号1の201位に相当する位置の塩基がAであるアレルについてホモ接合性であるという遺伝的特徴の存在及び/又は不在を検出するための試薬を含む、高RebD含有ステビア植物体のスクリーニングキット。
以下の(1)~(4)の遺伝的特徴の少なくとも1つの存在及び/又は不在を検出するための試薬をさらに含む、[20]に記載のキット。(1)配列番号2の40位に相当する位置の塩基がTであるアレルについてホモ接合性である。
(2)配列番号3の44位に相当する位置の塩基がTであるアレルについてホモ接合性。
(3)配列番号4の41位に相当する位置の塩基がCであるアレルについてホモ接合性。
(4)配列番号5の55~72位に相当する部分が欠失しているアレルについてホモ接合性。
[22]
配列番号6の49位に相当する位置の塩基がAであるアレルについてヘテロ接合性であるという遺伝的特徴の存在及び/又は不在を検出するための試薬をさらに含む、[20]又は[21]に記載のキット。
[23]
試薬が、CAPS法、dCAPS法又はTaqMan PCR法に使用するプライマー及び/又はプローブを含む、[20]~[22]のいずれか一項に記載のキット。[24]
配列番号1の201位に相当する位置にCからAへの変異を導入する工程を含む、高RebD含有ステビア植物体を作出する方法。
[25]
変異の導入が、突然変異誘発処理によって行われる、[24]に記載の方法。
なお、本明細書において引用した全ての文献、及び公開公報、特許公報その他の特許文献は、参照として本明細書に組み込むものとする。また、本明細書は、2018年12月28日に出願された本願優先権主張の基礎となる日本国特許出願(特願2018-248656号)の明細書及び図面に記載の内容を包含する。
本発明は、以下の(1)~(4)の特徴の少なくとも1つを有する高RebD含有ステビア植物体(以下、「本発明の植物体」又は「本発明のステビア植物体」と総称する場合がある)を提供する。
(1)乾燥葉の単位質量当たり3.3%以上のRebDを含む(以下、「本発明の植物体A」又は「本発明のステビア植物体A」と称する場合がある)。
(2)乾燥葉の単位質量当たり2.6%以上のRebDと0.4%以上のRebMとを含む(以下、「本発明の植物体B」又は「本発明のステビア植物体B」と称する場合がある)。
(3)乾燥葉の単位質量当たりRebDとRebMを合計で3.7%以上含む(以下、「本発明の植物体C」又は「本発明のステビア植物体C」と称する場合がある)。
(4)総ステビオール配糖体に対するRebDとRebMの質量比が合計で37.8%以上(以下、「本発明の植物体D」又は「本発明のステビア植物体D」と称する場合がある)。
ここで乾燥葉とは、本発明のステビア植物体の新鮮葉を乾燥させることにより含水量を3~4重量%にまで減らしたものをいう。
別の態様において、本発明のステビア植物体は、以下の(B-1)~(B-4)の少なくとも1つの遺伝的特徴(以下、「本発明の遺伝的特徴B」と称する場合がある)を有する。
(B-1)配列番号2の40位に相当する位置の塩基がTであるアレルについてホモ接合性である(以下、「本発明の遺伝的特徴B-1」と称する場合がある)。
(B-2)配列番号3の44位に相当する位置の塩基がTであるアレルについてホモ接合性である(以下、「本発明の遺伝的特徴B-2」と称する場合がある)。
(B-3)配列番号4の41位に相当する位置の塩基がCであるアレルについてホモ接合性である(以下、「本発明の遺伝的特徴B-3」と称する場合がある)。
(B-4)配列番号5の55~72位に相当する部分が欠失しているアレルについてホモ接合性である(以下、「本発明の遺伝的特徴B-4」と称する場合がある)。
別の態様において、本発明のステビア植物体は、配列番号6の49位に相当する位置の塩基がAであるアレルについてヘテロ接合性であるという遺伝的特徴(以下、「本発明の遺伝的特徴C」と称する場合がある)を有する。
ここでは簡潔のため本発明の遺伝的特徴Aを例に説明したが、本発明の遺伝的特徴B(遺伝的特徴B-1~B-4を含む)及びCについても同様である。
特定の態様において、「配列番号2に相当する塩基配列からなる部分」には、例えば、配列番号9の塩基配列を含むフォワードプライマーと、配列番号10の塩基配列を含むリバースプライマーとを用いたPCRにより増幅され得るステビア植物のゲノムの部分が含まれる。
特定の態様において、「配列番号3に相当する塩基配列からなる部分」には、例えば、配列番号11の塩基配列を含むフォワードプライマーと、配列番号12の塩基配列を含むリバースプライマーとを用いたPCRにより増幅され得るステビア植物のゲノムの部分が含まれる。
特定の態様において、「配列番号4に相当する塩基配列からなる部分」には、例えば、配列番号13の塩基配列を含むフォワードプライマーと、配列番号14の塩基配列を含むリバースプライマーとを用いたPCRにより増幅され得るステビア植物のゲノムの部分が含まれる。
特定の態様において、「配列番号5に相当する塩基配列からなる部分」には、例えば、配列番号15の塩基配列を含むフォワードプライマーと、配列番号16の塩基配列を含むリバースプライマーとを用いたPCRにより増幅され得るステビア植物のゲノムの部分が含まれる。
特定の態様において、「配列番号6に相当する塩基配列からなる部分」には、例えば、配列番号17の塩基配列を含むフォワードプライマーと、配列番号18の塩基配列を含むリバースプライマーとを用いたPCRにより増幅され得るステビア植物のゲノムの部分が含まれる。
特定の態様において、「配列番号2の40位に相当する位置の塩基がTであるアレル」は、配列番号22、23又は24の塩基配列を含む。
特定の態様において、「配列番号3の44位に相当する位置の塩基がTであるアレル」は、配列番号25、26又は27の塩基配列を含む。
特定の態様において、「配列番号4の41位に相当する位置の塩基がCであるアレル」は、配列番号28、29又は30の塩基配列を含む。
特定の態様において、「配列番号5の55~72位に相当する部分が欠失しているアレル」は、配列番号31、32又は33の塩基配列を含む。
特定の態様において、「配列番号6の49位に相当する位置の塩基がAであるアレル」は、配列番号34、35又は36の塩基配列を含む。
また、(A)配列番号1の201位に相当する位置におけるCからAへの変異、(B-1)配列番号2の40位に相当する位置におけるAからTへの変異、(B-2)配列番号3の44位に相当する位置におけるCからTへの変異、(B-3)配列番号4の41位に相当する位置におけるGからCへの変異、(B-4)配列番号5の55~72位に相当する部分の欠失、及び(C)配列番号6の49位に相当する位置におけるCからAへの変異からなる群から選択される変異を、「本発明の多型」又は「本発明の変異」と総称することがある。
候補植物体が遺伝的特徴Aを有する場合、例えば、候補植物体のゲノムDNAに対し、配列番号37に示す塩基配列を有するフォワードプライマー及び配列番号38に示す塩基配列を有するリバースプライマーを用いてPCR増幅を行い、得られたPCR産物(約196bp長)(例えば、配列番号39又は40)に対し制限酵素Hpy188Iによる処理を行うと、約96bp長のバンド(例えば、配列番号41)と約100bp長のバンド(例えば、配列番号42)が生じる。一方、約43bp(例えば、配列番号43)及び約57bp(例えば、配列番号44)の制限酵素処理産物を生じる場合、その候補植物体は遺伝的特徴Aを有しない。
上記bp長に関し、「約」とは、±5bpを意味する。制限酵素処理は、使用する各制限酵素の販売元が推奨する条件に従って行うことができる。
さらに、このようにして得られた抽出液に対し、酢酸エチルその他の有機溶媒:水の勾配、高速液体クロマトグラフィー(High Performance Liquid Chromatography:HPLC)、ガスクロマトグラフィー、飛行時間型質量分析(Time-of-Flight mass spectrometry:TOF-MS)、超高性能液体クロマトグラフィー(Ultra (High) Performance Liquid chromatography:UPLC)等の公知の方法を用いることにより個々のステビオール配糖体、例えばRebD及びMを精製することができる。
本発明は、別の実施態様において、本発明のステビア植物体と第2のステビア植物体とを交雑させる工程を含む、以下の(1)~(4)の特徴の少なくとも1つを有する高RebD含有ステビア植物体を作出する方法(以下、「本発明の作出方法」と称する場合がある)を提供する。
(1)乾燥葉の単位質量当たり3.3%以上のRebDを含む。
(2)乾燥葉の単位質量当たり2.6%以上のRebDと0.4%以上のRebMとを含む。
(3)乾燥葉の単位質量当たりRebDとRebMを合計で3.7%以上含む。
(4)総ステビオール配糖体に対するRebDとRebMの質量比が合計で37.8%以上。
当該方法により作出される高RebD含有ステビア植物体は、本発明の植物体と同じ表現型と遺伝的性質を有する。
一般に、植物細胞は、培養の間に変異を伴うことがあるため、より安定した形質維持のために植物個体に戻すことが好ましい。
本発明の植物体を宿主として事後的に遺伝子組み換え(例えばゲノム編集等により)を行って得られた植物体(例えば、本発明の植物体を宿主として遺伝子組み換えを行って、さらに別の形質を付加した植物体)も、本発明の範囲から除外されるものではない。
本発明の植物体及び本発明の植物体と同じ表現型と遺伝的性質を有する植物体は、当該植物体の組織から本発明の遺伝的特徴を検出することによりスクリーニングすることができる。ここで、「スクリーニング」とは、本発明の植物体とそれ以外の植物体とを識別し、本発明の植物体を選択することを意味する。
したがって、本発明は、別の側面において、被験植物のゲノムから本発明の遺伝的特徴A~Cの少なくとも1つの存在及び/又は不在を検出する工程を含む、高RebD含有ステビア植物体をスクリーニングする方法(以下、「本発明のスクリーニング方法」と称する場合がある)を提供する。
本発明のスクリーニング方法は、上記の少なくとも1つの遺伝的特徴の存在が検出された植物体を被験植物の中から選択する工程をさらに含んでもよい。
(A)配列番号1の201位に相当する位置の塩基がAであるアレル(例えば、配列番号69の塩基配列を含むアレル)、
(B-1)配列番号2の40位に相当する位置の塩基がTであるアレル(例えば、配列番号70の塩基配列を含むアレル)、
(B-2)配列番号3の44位に相当する位置の塩基がTであるアレル(例えば、配列番号71の塩基配列を含むアレル)、
(B-3)配列番号4の41位に相当する位置の塩基がCであるアレル(例えば、配列番号72の塩基配列を含むアレル)、
(B-4)配列番号5の55~72位に相当する部分が欠失しているアレル(例えば、配列番号73の塩基配列を含むアレル)、及び
(C)配列番号6の49位に相当する位置の塩基がAであるアレル(例えば、配列番号74の塩基配列を含むアレル)
からなる群から選択されるアレルの存在の検出、及び/又は、
(a)配列番号1の201位に相当する位置の塩基がCであるアレル(例えば、配列番号1の塩基配列を含むアレル)、
(b-1)配列番号2の44位に相当する位置の塩基がAであるアレル(例えば、配列番号2の塩基配列を含むアレル)、
(b-2)配列番号3の40位に相当する位置の塩基がCであるアレル(例えば、配列番号3の塩基配列を含むアレル)、
(b-3)配列番号4の41位に相当する位置の塩基がGであるアレル(例えば、配列番号4の塩基配列を含むアレル)、
(b-4)配列番号5の55~72位に相当する部分が欠失していないアレル(例えば、配列番号5の塩基配列を含むアレル)、及び
(c)配列番号6の49位に相当する位置の塩基がCであるアレル(例えば、配列番号6の塩基配列を含むアレル)
からなる群から選択されるアレルの不在の検出
により決定することができる。
(A)配列番号1の201位に相当する位置の塩基がAであるアレル(例えば、配列番号69の塩基配列を含むアレル)、
(B-1)配列番号2の40位に相当する位置の塩基がTであるアレル(例えば、配列番号70の塩基配列を含むアレル)、
(B-2)配列番号3の44位に相当する位置の塩基がTであるアレル(例えば、配列番号71の塩基配列を含むアレル)、
(B-3)配列番号4の41位に相当する位置の塩基がCであるアレル(例えば、配列番号72の塩基配列を含むアレル)、
(B-4)配列番号5の55~72位に相当する部分が欠失しているアレル(例えば、配列番号73の塩基配列を含むアレル)、及び
(C)配列番号6の49位に相当する位置の塩基がAであるアレル(例えば、配列番号74の塩基配列を含むアレル)
からなる群から選択されるアレルの不在の検出、及び/又は、
(a)配列番号1の201位に相当する位置の塩基がCであるアレル(例えば、配列番号1の塩基配列を含むアレル)、
(b-1)配列番号2の44位に相当する位置の塩基がAであるアレル(例えば、配列番号2の塩基配列を含むアレル)、
(b-2)配列番号3の40位に相当する位置の塩基がCであるアレル(例えば、配列番号3の塩基配列を含むアレル)、
(b-3)配列番号4の41位に相当する位置の塩基がGであるアレル(例えば、配列番号4の塩基配列を含むアレル)、
(b-4)配列番号5の55~72位に相当する部分が欠失していないアレル(例えば、配列番号5の塩基配列を含むアレル)、及び
(c)配列番号6の49位に相当する位置の塩基がCであるアレル(例えば、配列番号6の塩基配列を含むアレル)
からなる群から選択されるアレルの存在の検出
により決定することができる。
あるいは、本発明の多型とプライマー配列とは重複させず、かつ本発明の遺伝子変異をPCR増幅させることが可能なようにプライマー配列を設計し、増幅されたヌクレオチド断片の塩基配列をシーケンスすることにより、本発明の遺伝的特徴を検出することができる。
PCR及びアガロースゲル電気泳動については、以下を参照:Sambrook, Fritsch and Maniatis, ”Molecular Cloning: A Laboratory Manual” 2nd Edition (1989), Cold Spring Harbor Laboratory Press。
シークエンス法とは、変異を含む領域をPCRにて増幅させ、Dye Terminatorなどを用いてDNA配列をシークエンスすることで、変異の有無を解析する方法である(Sambrook, Fritsch and Maniatis, ”Molecular Cloning: A Laboratory Manual” 2nd Edition (1989), Cold Spring Harbor Laboratory Press)。
DNAマイクロアレイは、ヌクレオチドプローブの一端が支持体上にアレイ状に固定されたものであり、DNAチップ、Geneチップ、マイクロチップ、ビーズアレイ等を包含する。本発明の多型と相補的な配列を含むプローブを用いることで、網羅的に本発明の多型の有無を検出することができる。DNAチップなどのDNAマイクロアレイアッセイとしてはGeneChipアッセイが挙げられる(Affymetrix社;米国特許第6,045,996号、同第5,925,525号、及び同第5,858,659号参照)。GeneChip技術は、チップに貼り付けたオリゴヌクレオチドプローブの小型化高密度マイクロアレイを利用するものである。
TILLING(Targeting Induced Local Lesions IN Genomes)法とは、変異導入した突然変異体集団のゲノム中の変異ミスマッチをPCR増幅とCEL Iヌクレアーゼ処理によってスクリーニングする方法である。
フォワードプライマー:ATGGTTTGGGAATAGCTCTGTTGTT(配列番号37)
リバースプライマー:AGAACTTTGTTCTTGAACCTCTTG(配列番号38)
(B-1)配列番号45に示す塩基配列を含むフォワードプライマー及び配列番号46に示す塩基配列を含むリバースプライマーを含む、プライマーセット、
(B-2)配列番号50に示す塩基配列を含むフォワードプライマー及び配列番号51に示す塩基配列を含むリバースプライマーを含む、プライマーセット、
(B-3)配列番号55に示す塩基配列を含むフォワードプライマー及び配列番号56に示す塩基配列を含むリバースプライマーを含む、プライマーセット、又は
(B-4)配列番号60に示す塩基配列を含むフォワードプライマー及び配列番号61に示す塩基配列を含むリバースプライマーを含む、プライマーセット。
(B-1’’)配列番号45における任意の連続する15塩基以上の配列を有する又は含むフォワードプライマー及び配列番号46における任意の連続する15塩基以上の配列を有する又は含むリバースプライマーを含む、プライマーセット、
(B-2’’)配列番号50における任意の連続する15塩基以上の配列を有する又は含むフォワードプライマー及び配列番号51における任意の連続する15塩基以上の配列を有する又は含むリバースプライマーを含む、プライマーセット、
(B-3’’)配列番号55における任意の連続する15塩基以上の配列を有する又は含むフォワードプライマー及び配列番号56における任意の連続する15塩基以上の配列を有する又は含むリバースプライマーを含む、プライマーセット、あるいは(B-4’’)配列番号60における任意の連続する15塩基以上の配列を有する又は含むフォワードプライマー及び配列番号61における任意の連続する15塩基以上の配列を有する又は含むリバースプライマーを含む、プライマーセット。
このようなプライマーは、前記任意の連続する15塩基以上の配列が3‘側末端に存在すれば、15~50塩基長、20~45塩基長、30~65塩基長の長さにあってもよい。
・プライマーセット:
3’末端に位置する配列番号86~109から選択される配列と、任意選択で前記配列の5’末端に付加される配列番号6の28位から5’側に続く任意の連続する配列(例えば、任意の長さの連続する配列)とを含むフォワードプライマーと、配列番号6の50位より3’側に位置する任意の連続する20塩基以上の配列に相補的な配列(例えば、配列番号65、110)を含むリバースプライマーとを含む、プライマーセット。プライマーの配列は、上記の条件を満たす範囲で最適化することができる。プライマー設計の最適化については、例えば、Sambrook and Russell, ”Molecular Cloning: A Laboratory Manual” 3rd Edition (2001), Cold Spring Harbor Laboratory Press等を参照のこと。また、上記各プライマーは、15~50塩基長、18~48塩基長、20~45塩基長、30~65塩基長等であってよい。
(i)被験ステビア植物のゲノムから、本発明の遺伝的特徴を検出する工程、
(ii)本発明の遺伝的特徴が検出された被験ステビア植物組織のRebDの含有量を測定する工程、
(iii)本発明の遺伝的特徴が検出された被験ステビア植物体のうち、RebDの含有量が高い個体を選択する工程、
(iv)選択したRebDの含有量が高い個体を他のステビア植物体と交配する工程、
(v)交配により得られた子植物体のゲノムから、本発明の遺伝的特徴を検出する工程、
(vi)本発明の遺伝的特徴が検出された子植物組織のRebDの含有量を測定する工程、
(vii)本発明の遺伝的特徴が検出された子植物体のうち、RebDの含有量が高い個体を選択する工程。
本発明のスクリーニング方法において、被験ステビア植物体は、突然変異誘発処理を行ったステビア植物及びその子孫植物を含んでもよい。突然変異誘発処理については、本発明の植物体の項に記載したとおりであり、変異誘発剤による処理や、放射線又は光線の照射による処理等を含む。
当該キットにおいて、(B-1)、(B-1’)及び(B-1’’)からなる群より選択される選択されるいずれか一つ以上のプライマーセットを用いる場合、前記キットに含まれる制限酵素はKpnIである。
当該キットにおいて、(B-2)、(B-2’)及び(B-2’’)からなる群より選択される選択されるいずれか一つ以上のプライマーセットを用いる場合、前記キットに含まれる制限酵素はXbaIである。
当該キットにおいて、(B-3)、(B-3’)及び(B-3’’)からなる群より選択される選択されるいずれか一つ以上のプライマーセットを用いる場合、前記キットに含まれる制限酵素はAflIIである。
前記プライマーセットが配列番号45における任意の連続する15塩基以上の配列を有する又は含むフォワードプライマーを含む場合は、前記制限酵素はKpnIを含み、
前記プライマーセットが配列番号50における任意の連続する15塩基以上の配列を有する又は含むフォワードプライマーを含む場合は、前記制限酵素はXbaIを含み、
前記プライマーセットが配列番号55における任意の連続する15塩基以上の配列を有する又は含むフォワードプライマーを含む場合は、前記制限酵素はAflIIを含む
本発明のさらなる態様において、本発明の植物体、又は当該植物体の種子若しくは葉(例えば、乾燥葉又は新鮮葉)から抽出物を得る工程を含む、RebD含有抽出物の製造方法(以下、「本発明の抽出物の製造方法」と称する場合がある)が提供される。さらに、本発明の抽出物の製造方法により得られた抽出物からRebDを精製する工程を含む、RebDの製造方法(以下、「本発明のRebDの製造方法」と称する場合がある)が提供される。
具体的には、本発明の高RebD含有ステビア植物体、本発明のスクリーニング方法により選別された高RebD含有ステビア植物体又は本発明の方法により製造された高RebD含有ステビア植物体からRebD、RebM又はその両方を含む抽出物を得る工程を含む、RebD、RebM又はその両方の製造方法が提供される。
RebD、RebM又はその両方を含む抽出物は、本発明の植物体の新鮮葉又は乾燥葉に適切な溶媒(水等の水性溶媒又はアルコール、エーテル及びアセトン等の有機溶媒)を反応させることにより得ることができる。抽出条件等はOhta et al.,J. Appl. Glycosci., Vol. 57, No. 3 (2010)又はWO2010/038911に記載の方法や、後述の実施例に記載の方法を参照することができる。
また、RebD、RebM又はその両方を含む抽出物を酢酸エチルその他の有機溶媒:水の勾配、高速液体クロマトグラフィー(High Performance Liquid Chromatography:HPLC)、ガスクロマトグラフィー、飛行時間型質量分析(Time-of-Flight mass spectrometry:TOF-MS)、超高性能液体クロマトグラフィー(Ultra (High) Performance Liquid chromatography:UPLC)等の公知の方法を用いることによりRebD、RebM又はその両方を精製することができる。
本発明の抽出物は、野生型ステビア種から得られた抽出物と比べRebD、RebM又はその両方を300%以上、400%以上、500%以上、600%以上、700%以上、800%以上、900%以上、1100%以上、1200%以上、1300%以上、1400%以上、1500%以上、1600%以上、1700%以上、1800%以上、1900%以上、2000%以上、2100%以上、2200%以上、2300%以上、2400%以上、2500%以上、2600%以上、2700%以上、2800%以上、2900%以上、3000%以上、3100%以上、3200%以上、3300%以上、3400%以上、3500%以上、3600%以上、3700%以上、3800%以上、3900%以上、4000%以上、4100%以上、4200%以上、4300%以上、4400%以上、4500%以上、4600%以上、4700%以上、4800%以上、4900%以上、5000%以上高い含量で含んでいてもよい。ここで、本発明の抽出物と、野生型ステビア種から得られた抽出物は、同じ方法で得られたものであってよい。
本発明は、別の側面において、本発明のステビア植物体に係る塩基配列を提供する。本発明の遺伝的特徴Aを有するステビア植物体に係る塩基配列の特定の態様は、配列番号19~21及び69から選択される塩基配列を含む、又はそれからなる。本発明の遺伝的特徴B(すなわち、本発明の遺伝的特徴B-1~B-4の少なくとも1つ)を有するステビア植物体に係る塩基配列の特定の態様は、配列番号22~33及び70~73から選択される塩基配列を含む、又はそれからなる。本発明の遺伝的特徴Cを有するステビア植物体に係る塩基配列の特定の態様は、配列番号34~36及び74から選択される塩基配列を含む、又はそれからなる。本発明の遺伝的特徴Aと遺伝的特徴Bとを有するステビア植物体に係る塩基配列の特定の態様は、配列番号19~21及び69から選択される塩基配列と、配列番号22~33及び70~73から選択される塩基配列とを含む。本発明の遺伝的特徴Aと遺伝的特徴Cとを有するステビア植物体に係る塩基配列の特定の態様は、配列番号19~21及び69から選択される塩基配列と、配列番号34~36及び74から選択される塩基配列とを含む。本発明の遺伝的特徴Bと遺伝的特徴Cとを有するステビア植物体に係る塩基配列の特定の態様は、配列番号22~33及び70~73から選択される塩基配列と、配列番号34~36及び74から選択される塩基配列とを含む。本発明の遺伝的特徴A~Cをすべて有するステビア植物体に係る塩基配列の特定の態様は、配列番号19~21及び69から選択される塩基配列と、配列番号22~33及び70~73から選択される塩基配列と、配列番号34~36及び74から選択される塩基配列とを含む。
1.試験系統の作製
高TSG含有型の遺伝的特徴を有する雄株(P1)と、高RebM含有型の遺伝的特徴を有する雌株(P2)とを交配させ、雑種第1代(S1世代)種子を採種し、サントリー研究センター内の温室内で播種し、S1世代苗を得た。
高RebM含有型の遺伝的特徴は、以下の少なくとも1つの特徴を有する。
B-1:配列番号2の40位に相当する位置の塩基がTであるアレルについてホモ接合性。
B-2:配列番号3の44位に相当する位置の塩基がTであるアレルについてホモ接合性。
B-3:配列番号4の41位に相当する位置の塩基がCであるアレルについてホモ接合性。
B-4:配列番号5の55~72位に相当する部分が欠失しているアレルについてホモ接合性。
これらの遺伝的特徴が高RebM含有特性に係ることは、本出願人による未公開の先願(2018年10月12日に出願したPCT/JP2018/038064)に示されている。
高TSG含有型の遺伝的特徴は、以下の特徴を有する。
C:配列番号6の49位に相当する位置の塩基がAであるアレルについてヘテロ接合性。
上記の遺伝的特徴が高TSG含有特性に係ることは、本出願人による未公開の先願(2018年7月31日に出願した特願2018-144512)に示されている。
また、P1及びP2は、いずれもエチルメタンスルホン酸(EMS)処理により遺伝子が改変された個体の子孫である。
P1、P2及びS1世代個体より適量の新鮮葉をサンプリングし、0.25gの新鮮葉をフリーズドライにより乾燥し、破砕物乾物0.05gを純水中に投入した。超音波処理20分にて抽出し、遠心・濾過した後に0.33mLの抽出液を得た。この抽出液をLCMS8050イオンモード(島津LCMS8050)にてLC/MS-MS分析を行い、RebA、RebB、RebC、RebD、RebF、RebM、RebN及びRebOの濃度(乾燥葉に対する質量%)を定量し、その合計を総ステビオール配糖体(TSG)濃度とした。結果を下表に示す。
実施例1で試験した各個体の新鮮葉からゲノムDNAを抽出し、遺伝的特徴B-1及びCの保有状況を調査した。
遺伝的特徴B-1の検出には、以下のプライマーを用いてPCRを行い、PCR産物に制限酵素(KpnI)を添加し、37℃で酵素反応を行い、制限酵素による処理を行った。制限酵素処理後、マイクロチップ型電気泳動装置LabChip GX Touch HTにより電気泳動を行い、電気泳動後のバンドパターンによってマーカーの識別を行った。
プライマーの配列は以下のとおり。
Fwプライマー:5’-TAATCATCCAAACCCTAATCTCGCCAAACAACCGGGTAC-3’(配列番号45)
Rvプライマー:5’-GAGGAAGACATTGGCAACTC-3’(配列番号46)
得られたPCR産物(約297bp長)に対しKpnI制限酵素処理を行い、約260bpの制限酵素処理産物(例えば、配列番号49)を生じなかったものを遺伝的特徴B-1陽性とした。
フォワードプライマー:5’-TTATTTAATGATCCAATGGAGGGGGTGATTCAGGTAATAAAAGGCACT-3’(配列番号64)
リバースプライマー:5’-TGAGGGTTCTCAATTGATTTCCGATTGG-3’(配列番号65)
得られた約367bpPCR産物(例えば、配列番号66又は67)に対しSpeI制限酵素処理を行い、約321bpの制限酵素処理産物(例えば、配列番号68)を生じたものを遺伝的特徴C陽性とした。
A:配列番号1の201位に相当する位置の塩基がAであるアレルについてホモ接合性。
上記結果が示すとおり、高RebD含有個体(S1-1~S1-3)はいずれも遺伝的特徴A、B-1及びCを保有しており、遺伝的特徴Aを保有しない個体に比べ、RebD含量が高い傾向がみられた。
Claims (25)
- 乾燥葉の単位質量当たり3.3%以上のRebDを含む、高レバウジオシドD(RebD)含有ステビア植物体。
- 配列番号1の201位に相当する位置の塩基がAであるアレルについてホモ接合性である、請求項1に記載の植物体。
- 以下の遺伝的特徴の少なくとも1つをさらに有する、請求項1又は2に記載の植物体。
(1)配列番号2の40位に相当する位置の塩基がTであるアレルについてホモ接合性である。
(2)配列番号3の44位に相当する位置の塩基がTであるアレルについてホモ接合性。
(3)配列番号4の41位に相当する位置の塩基がCであるアレルについてホモ接合性。
(4)配列番号5の55~72位に相当する部分が欠失しているアレルについてホモ接合性。 - 配列番号6の49位に相当する位置の塩基がAであるアレルについてヘテロ接合性である、請求項1~3のいずれか一項に記載の植物体。
- 非遺伝子組換植物体である、請求項1~4のいずれか一項に記載の植物体。
- 突然変異誘発処理を行ったステビア植物体及びその子孫植物体を含む、請求項1~5のいずれか一項に記載の植物体。
- 請求項1~6のいずれか一項に記載の植物体の種子、組織、組織培養物又は細胞。
- 胚、分裂組織細胞、花粉、葉、根、根端、花弁、プロトプラスト、葉の切片及びカルスから選択される、請求項7に記載の組織、組織培養物又は細胞。
- 請求項1~6のいずれか一項に記載の植物体と第2のステビア植物体とを交雑させる工程を含む、乾燥葉の単位質量当たり3.3 %以上のRebDを含む高RebD含有ステビア植物体を作出する方法。
- 第2の植物体が請求項1~5のいずれか一項に記載の植物体である、請求項9に記載の方法。
- RebDを含む、請求項1~6のいずれか一項に記載の植物体、請求項7又は8に記載の種子、組織、組織培養物又は細胞の抽出物。
- 請求項1~6のいずれか一項に記載の植物体、請求項7又は8に記載の種子、組織、組織培養物又は細胞から抽出物を得る工程を含む、RebD含有抽出物の製造方法。
- 請求項11に記載の抽出物からRebDを精製する工程を含む、RebDの製造方法。
- 請求項1~6のいずれか一項に記載の植物体の抽出物、請求項7又は8に記載の種子、組織、組織培養物又は細胞の抽出物、あるいは、請求項11に記載の抽出物を提供する工程、及び
前記抽出物を、飲食品、甘味組成物、香料又は医薬品の原料に添加する工程
を含む、飲食品、甘味組成物、香料又は医薬品の製造方法。 - 被験ステビア植物体のゲノムから、配列番号1の201位に相当する位置の塩基がAであるアレルについてホモ接合性であるという遺伝的特徴の存在及び/又は不在を検出する工程を含む、高RebD含有ステビア植物体をスクリーニングする方法。
- 被験ステビア植物体のゲノムから以下の遺伝的特徴の少なくとも1つの存在及び/又は不在を検出する工程をさらに含む、請求項15に記載の方法。
(1)配列番号2の40位に相当する位置の塩基がTであるアレルについてホモ接合性である。
(2)配列番号3の44位に相当する位置の塩基がTであるアレルについてホモ接合性。
(3)配列番号4の41位に相当する位置の塩基がCであるアレルについてホモ接合性。
(4)配列番号5の55~72位に相当する部分が欠失しているアレルについてホモ接合性。 - 被験ステビア植物体のゲノムから、配列番号6の49位に相当する位置の塩基がAであるアレルについてヘテロ接合性であるという遺伝的特徴の存在及び/又は不在を検出する工程をさらに含む、請求項15又は16に記載の方法。
- 遺伝的特徴を検出する工程が、CAPS法、dCAPS法又はTaqMan PCR法を用いて行われる、請求項15~17のいずれか一項に記載の方法。
- 被験ステビア植物組織の甘味成分の含有量を測定する工程をさらに含む、請求項15~18のいずれか一項に記載の方法。
- 配列番号1の201位に相当する位置の塩基がAであるアレルについてホモ接合性であるという遺伝的特徴の存在及び/又は不在を検出するための試薬を含む、高RebD含有ステビア植物体のスクリーニングキット。
- 以下の(1)~(4)の遺伝的特徴の少なくとも1つの存在及び/又は不在を検出するための試薬をさらに含む、請求項20に記載のキット。(1)配列番号2の40位に相当する位置の塩基がTであるアレルについてホモ接合性である。
(2)配列番号3の44位に相当する位置の塩基がTであるアレルについてホモ接合性。
(3)配列番号4の41位に相当する位置の塩基がCであるアレルについてホモ接合性。
(4)配列番号5の55~72位に相当する部分が欠失しているアレルについてホモ接合性。 - 配列番号6の49位に相当する位置の塩基がAであるアレルについてヘテロ接合性であるという遺伝的特徴の存在及び/又は不在を検出するための試薬をさらに含む、請求項20又は21に記載のキット。
- 試薬が、CAPS法、dCAPS法又はTaqMan PCR法に使用するプライマー及び/又はプローブを含む、請求項20~22のいずれか一項に記載のキット。
- 配列番号1の201位に相当する位置にCからAへの変異を導入する工程を含む、高RebD含有ステビア植物体を作出する方法。
- 変異の導入が、突然変異誘発処理によって行われる、請求項24に記載の方法。
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US17/418,050 US20220087124A1 (en) | 2018-12-28 | 2019-12-26 | Rebaudioside d-rich stevia plant |
AU2019415370A AU2019415370A1 (en) | 2018-12-28 | 2019-12-26 | Rebaudioside D-rich stevia plant |
PE2021001071A PE20211964A1 (es) | 2018-12-28 | 2019-12-26 | Planta de stevia con alto contenido de rebaudiosido d |
EP19901824.3A EP3903574A4 (en) | 2018-12-28 | 2019-12-26 | STEVIA PLANT RICH IN REBAUDIOSIDE D |
BR112021012541-8A BR112021012541A2 (pt) | 2018-12-28 | 2019-12-26 | Planta de estévia, semente, tecido, cultura de tecido ou célula, métodos para produzir uma planta de estévia, um extrato, rebaudiosídeo d, um alimento ou bebida, uma composição adoçante, um sabor ou um medicamento e para selecionar uma planta de estévia, extrato, e, kit |
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Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5858659A (en) | 1995-11-29 | 1999-01-12 | Affymetrix, Inc. | Polymorphism detection |
US5925525A (en) | 1989-06-07 | 1999-07-20 | Affymetrix, Inc. | Method of identifying nucleotide differences |
US6045996A (en) | 1993-10-26 | 2000-04-04 | Affymetrix, Inc. | Hybridization assays on oligonucleotide arrays |
JP2009517043A (ja) | 2005-11-23 | 2009-04-30 | ザ・コカ−コーラ・カンパニー | ビタミンを含む高甘味度甘味料組成物及びこれにより甘味を付与された組成物 |
WO2010038911A1 (en) | 2008-10-03 | 2010-04-08 | Morita Kagaku Kogyo Co., Ltd. | New steviol glycoside |
US20160057955A1 (en) | 2014-09-02 | 2016-03-03 | Purecircle Sdn Bhd | Stevia Cultivar '817096' |
JP2016515814A (ja) * | 2013-03-15 | 2016-06-02 | カーギル・インコーポレイテッド | 増大したレバウジオシドd含量を有するステビア属植物 |
WO2016155814A1 (fr) | 2015-04-01 | 2016-10-06 | Rolex Sa | Mécanisme de remontage et/ou de correction d'au moins une fonction horlogère et dispositif de sélection d'une fonction horlogère |
US20170290285A1 (en) * | 2014-12-08 | 2017-10-12 | Glg Life Tech Corporation | High rebaudioside-c plant varietal and compositions extracted therefrom with high rebaudioside-c and total steviol glycoside content |
US20180042280A1 (en) * | 2015-02-24 | 2018-02-15 | Glg Life Tech Corporation | High rebaudioside-a plant varietal, methods of extraction and purification therefrom, of compositions with enhanced rebaudioside-a content and uses of said composition |
JP2018144512A (ja) | 2017-03-01 | 2018-09-20 | 株式会社ジェイテクト | 操舵制御装置 |
WO2019074089A1 (ja) * | 2017-10-12 | 2019-04-18 | サントリーホールディングス株式会社 | 高レバウジオシドm含有ステビア植物 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107072237B (zh) * | 2014-09-02 | 2021-12-14 | 谱赛科有限责任公司 | 甜菊提取物 |
US10370673B2 (en) * | 2014-09-26 | 2019-08-06 | Purecircle Sdn Bhd | Single nucleotide polymorphism (SNP) markers for stevia |
-
2019
- 2019-12-23 AR ARP190103854A patent/AR117736A1/es unknown
- 2019-12-26 JP JP2020562456A patent/JP7520722B2/ja active Active
- 2019-12-26 PE PE2021001071A patent/PE20211964A1/es unknown
- 2019-12-26 BR BR112021012541-8A patent/BR112021012541A2/pt unknown
- 2019-12-26 US US17/418,050 patent/US20220087124A1/en active Pending
- 2019-12-26 AU AU2019415370A patent/AU2019415370A1/en active Pending
- 2019-12-26 WO PCT/JP2019/051299 patent/WO2020138364A1/ja unknown
- 2019-12-26 CN CN201980085757.6A patent/CN113226017A/zh active Pending
- 2019-12-26 EP EP19901824.3A patent/EP3903574A4/en active Pending
Patent Citations (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5925525A (en) | 1989-06-07 | 1999-07-20 | Affymetrix, Inc. | Method of identifying nucleotide differences |
US6045996A (en) | 1993-10-26 | 2000-04-04 | Affymetrix, Inc. | Hybridization assays on oligonucleotide arrays |
US5858659A (en) | 1995-11-29 | 1999-01-12 | Affymetrix, Inc. | Polymorphism detection |
JP2009517043A (ja) | 2005-11-23 | 2009-04-30 | ザ・コカ−コーラ・カンパニー | ビタミンを含む高甘味度甘味料組成物及びこれにより甘味を付与された組成物 |
WO2010038911A1 (en) | 2008-10-03 | 2010-04-08 | Morita Kagaku Kogyo Co., Ltd. | New steviol glycoside |
JP2012504552A (ja) | 2008-10-03 | 2012-02-23 | 守田化学工業株式会社 | 新規ステビオール配糖体 |
JP2016515814A (ja) * | 2013-03-15 | 2016-06-02 | カーギル・インコーポレイテッド | 増大したレバウジオシドd含量を有するステビア属植物 |
US20160057955A1 (en) | 2014-09-02 | 2016-03-03 | Purecircle Sdn Bhd | Stevia Cultivar '817096' |
US20170290285A1 (en) * | 2014-12-08 | 2017-10-12 | Glg Life Tech Corporation | High rebaudioside-c plant varietal and compositions extracted therefrom with high rebaudioside-c and total steviol glycoside content |
US20180042280A1 (en) * | 2015-02-24 | 2018-02-15 | Glg Life Tech Corporation | High rebaudioside-a plant varietal, methods of extraction and purification therefrom, of compositions with enhanced rebaudioside-a content and uses of said composition |
WO2016155814A1 (fr) | 2015-04-01 | 2016-10-06 | Rolex Sa | Mécanisme de remontage et/ou de correction d'au moins une fonction horlogère et dispositif de sélection d'une fonction horlogère |
JP2018144512A (ja) | 2017-03-01 | 2018-09-20 | 株式会社ジェイテクト | 操舵制御装置 |
WO2019074089A1 (ja) * | 2017-10-12 | 2019-04-18 | サントリーホールディングス株式会社 | 高レバウジオシドm含有ステビア植物 |
Non-Patent Citations (8)
Title |
---|
"Protocols for in vitro cultures and secondary metabolite analysis of aromatic and medicinal plants", METHODS IN MOLECULAR BIOLOGY, vol. 1391, pages 113 - 123 |
LIVAK, K. J., GENET). ANAL., vol. 14, 1999, pages 143 |
LIVAK, K., J. BIOMOL. ENG., vol. 14, 1999, pages 143 - 149 |
LYAMICHEV, V. ET AL., SCIENCE, vol. 260, 1993, pages 778 - 783 |
MORRIS T. ET AL., J. CLIN. MICROBIOL., vol. 34, 1996, pages 2933 |
OHTA ET AL., J. APPL. GLYCOSCI., vol. 57, no. 3, 2010 |
SAMBROOKFRITSCHMANIATIS: "Molecular Cloning: A Laboratory Manual", 2001, COLD SPRING HARBOR LABORATORY PRESS |
See also references of EP3903574A4 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2021230258A1 (ja) * | 2020-05-12 | 2021-11-18 | サントリーホールディングス株式会社 | 高レバウジオシドe含有ステビア植物体 |
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