IL259853B1 - Sesame cultivars suitable for mechanical harvest with enhanced yield and quality - Google Patents
Sesame cultivars suitable for mechanical harvest with enhanced yield and qualityInfo
- Publication number
- IL259853B1 IL259853B1 IL259853A IL25985318A IL259853B1 IL 259853 B1 IL259853 B1 IL 259853B1 IL 259853 A IL259853 A IL 259853A IL 25985318 A IL25985318 A IL 25985318A IL 259853 B1 IL259853 B1 IL 259853B1
- Authority
- IL
- Israel
- Prior art keywords
- qtl
- sesame
- plant
- seeds
- nucleic acid
- Prior art date
Links
- 244000000231 Sesamum indicum Species 0.000 title claims description 140
- 235000003434 Sesamum indicum Nutrition 0.000 title claims description 91
- 238000003306 harvesting Methods 0.000 title description 15
- 241000196324 Embryophyta Species 0.000 claims description 75
- 239000002775 capsule Substances 0.000 claims description 65
- 150000007523 nucleic acids Chemical group 0.000 claims description 58
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- 230000002068 genetic effect Effects 0.000 claims description 45
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 28
- 244000038559 crop plants Species 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 22
- 229910052742 iron Inorganic materials 0.000 claims description 14
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 13
- 239000011701 zinc Substances 0.000 claims description 13
- 229910052725 zinc Inorganic materials 0.000 claims description 13
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 11
- 239000011575 calcium Substances 0.000 claims description 11
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- PEYUIKBAABKQKQ-AFHBHXEDSA-N (+)-sesamin Chemical compound C1=C2OCOC2=CC([C@H]2OC[C@H]3[C@@H]2CO[C@@H]3C2=CC=C3OCOC3=C2)=C1 PEYUIKBAABKQKQ-AFHBHXEDSA-N 0.000 description 1
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- FFEARJCKVFRZRR-BYPYZUCNSA-N L-methionine Chemical compound CSCC[C@H](N)C(O)=O FFEARJCKVFRZRR-BYPYZUCNSA-N 0.000 description 1
- QIVBCDIJIAJPQS-VIFPVBQESA-N L-tryptophane Chemical compound C1=CC=C2C(C[C@H](N)C(O)=O)=CNC2=C1 QIVBCDIJIAJPQS-VIFPVBQESA-N 0.000 description 1
- OUYCCCASQSFEME-QMMMGPOBSA-N L-tyrosine Chemical compound OC(=O)[C@@H](N)CC1=CC=C(O)C=C1 OUYCCCASQSFEME-QMMMGPOBSA-N 0.000 description 1
- 241000207960 Pedaliaceae Species 0.000 description 1
- 108700005075 Regulator Genes Proteins 0.000 description 1
- LUSZGTFNYDARNI-UHFFFAOYSA-N Sesamol Natural products OC1=CC=C2OCOC2=C1 LUSZGTFNYDARNI-UHFFFAOYSA-N 0.000 description 1
- ZZMNWJVJUKMZJY-AFHBHXEDSA-N Sesamolin Chemical compound C1=C2OCOC2=CC([C@H]2OC[C@H]3[C@@H]2CO[C@@H]3OC2=CC=C3OCOC3=C2)=C1 ZZMNWJVJUKMZJY-AFHBHXEDSA-N 0.000 description 1
- ZZMNWJVJUKMZJY-UHFFFAOYSA-N Sesamolin Natural products C1=C2OCOC2=CC(C2OCC3C2COC3OC2=CC=C3OCOC3=C2)=C1 ZZMNWJVJUKMZJY-UHFFFAOYSA-N 0.000 description 1
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- 241000561368 Webbia Species 0.000 description 1
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- VRMHCMWQHAXTOR-CMOCDZPBSA-N sesamin Natural products C1=C2OCOC2=CC([C@@H]2OC[C@@]3(C)[C@H](C=4C=C5OCOC5=CC=4)OC[C@]32C)=C1 VRMHCMWQHAXTOR-CMOCDZPBSA-N 0.000 description 1
- KQRXQIPRDKVZPW-ISZNXKAUSA-N sesaminol Chemical compound C1=C2OCOC2=CC([C@H]2OC[C@H]3[C@@H]2CO[C@@H]3C2=CC=3OCOC=3C=C2O)=C1 KQRXQIPRDKVZPW-ISZNXKAUSA-N 0.000 description 1
- KQRXQIPRDKVZPW-UHFFFAOYSA-N sesaminol Natural products C1=C2OCOC2=CC(C2OCC3C2COC3C2=CC=3OCOC=3C=C2O)=C1 KQRXQIPRDKVZPW-UHFFFAOYSA-N 0.000 description 1
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- 150000003626 triacylglycerols Chemical class 0.000 description 1
- OUYCCCASQSFEME-UHFFFAOYSA-N tyrosine Natural products OC(=O)C(N)CC1=CC=C(O)C=C1 OUYCCCASQSFEME-UHFFFAOYSA-N 0.000 description 1
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- 229910052727 yttrium Inorganic materials 0.000 description 1
- VWQVUPCCIRVNHF-UHFFFAOYSA-N yttrium atom Chemical compound [Y] VWQVUPCCIRVNHF-UHFFFAOYSA-N 0.000 description 1
Classifications
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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
- A01H5/10—Seeds
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N15/00—Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
- C12N15/09—Recombinant DNA-technology
- C12N15/63—Introduction of foreign genetic material using vectors; Vectors; Use of hosts therefor; Regulation of expression
- C12N15/79—Vectors or expression systems specially adapted for eukaryotic hosts
- C12N15/82—Vectors or expression systems specially adapted for eukaryotic hosts for plant cells, e.g. plant artificial chromosomes (PACs)
- C12N15/8241—Phenotypically and genetically modified plants via recombinant DNA technology
- C12N15/8261—Phenotypically and genetically modified plants via recombinant DNA technology with agronomic (input) traits, e.g. crop yield
- C12N15/8262—Phenotypically and genetically modified plants via recombinant DNA technology with agronomic (input) traits, e.g. crop yield involving plant development
- C12N15/8266—Abscission; Dehiscence; Senescence
-
- 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
- A01H5/08—Fruits
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N15/00—Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
- C12N15/09—Recombinant DNA-technology
- C12N15/63—Introduction of foreign genetic material using vectors; Vectors; Use of hosts therefor; Regulation of expression
- C12N15/79—Vectors or expression systems specially adapted for eukaryotic hosts
- C12N15/82—Vectors or expression systems specially adapted for eukaryotic hosts for plant cells, e.g. plant artificial chromosomes (PACs)
- C12N15/8241—Phenotypically and genetically modified plants via recombinant DNA technology
- C12N15/8261—Phenotypically and genetically modified plants via recombinant DNA technology with agronomic (input) traits, e.g. crop yield
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/146—Genetically Modified [GMO] plants, e.g. transgenic plants
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Genetics & Genomics (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Biotechnology (AREA)
- Organic Chemistry (AREA)
- Molecular Biology (AREA)
- Chemical & Material Sciences (AREA)
- Zoology (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Biomedical Technology (AREA)
- General Engineering & Computer Science (AREA)
- Botany (AREA)
- Environmental Sciences (AREA)
- Physiology (AREA)
- Developmental Biology & Embryology (AREA)
- Biophysics (AREA)
- Plant Pathology (AREA)
- Microbiology (AREA)
- Physics & Mathematics (AREA)
- Cell Biology (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Breeding Of Plants And Reproduction By Means Of Culturing (AREA)
Description
PCT/IL2016/051337 WO 2017/103928 SESAME CULTIVARS SUITABLE FOR MECHANICAL HARVEST WITH ENHANCED YIELD AND QUALITY FIELD OF THE INVENTION The present invention relates to sesame plants producing high yield of sesame seeds with improved nutritional quality and having indehiscent capsules at ripeness.
BACKGROUND OF THE INVENTION Sesame (Sesamum indicum L., 2n = 26), which belongs to the Sesamum genus of the Pedaliaceae family, is an important oil-crop worldwide. Sesame is one of the oldest crops in the world and has been under cultivation in Asia for over 5,500 years (Bedigian D. 2015. Webbia: Journal of Plant Taxonomy and Geography 70, 1-42). Sesame had spread into Africa, the Mediterranean and the Far East. Sesame is a tropical annual species grown for its oil and its nut flavored seeds. In the Middle East, a vast amount of sesame is consumed as sesame paste (tahini). In the Far East, sesame is widely used as cooking oil, and it is consumed for its medicinal properties. In the West, sesame seeds are primarily used for cooking and baking. The world production of sesame stands at about 5.4 (FAOstat, 2014). Nevertheless, sesame is in some respects an orphan crop- plant and it has been subjected to only limited research in modern genetics and breeding (Varshney RK et al., 2012. Nature Biotechnology 30, 1172-1176; Zhang H et al., 2013. Genome Biology 14, 401; Wei X et al., 2015. Nature Communications 6, 8609).
Sesame fruit is a capsule, normally pubescent, rectangular in section, and typically grooved with a short, triangular beak. The length of the fruit capsule varies from 2 to cm, its width varies between 0.5 and 2 cm, and the number of loculi varies from four to 12. The sesame seeds are found within the fruit capsules. Upon maturity in nature, the capsules holding the sesame seeds begin to dry down, the capsules normally split open (dehiscent), and the seeds fall out. From ancient times through the present, the opening of the capsule has been the major factor in attempting successfully to collect the seed. For manual harvesting, it is important that the capsules are readily dehiscent, such that the seeds can be collected upon employment of minimal force, typically by shaking the stems holding the capsules. For mechanical harvesting, a balance should be reached between retaining seeds within the capsule during the harvest, e.g., by combine PCT/IL2016/051337 WO 2017/103928 harvester, and releasing intact, commercially acceptable seeds from the capsules after harvest.
Throughout the ages, sesame seed and oil have been valued as a representative health food. The main constituents of sesame seeds are oil, protein, and carbohydrates.Among oil crops, sesame is one of the highest in oil content, ranging from 34 to 63%. Sesame oil consists of mainly four fatty acids (palmitic-C16:0, stearic-C18:0, oleic-C18:l and linoleic-C18:2). The high levels of unsaturated (UFA) and polyunsaturated fatty acids (PUFAs) increase the quality of the oil for human consumption. Moreover, a high level of PUFAs in sesame oil is claimed to reduce blood cholesterol and high blood pressure, and play an important role in preventing atherosclerosis, heart diseases and cancers. The stability of sesame oil against oxidative degradation is attributed to the high levels of antioxidants such as sesamol, sesamin, sesamolin and sesaminol that are believed to promote the integrity of body tissues in the presence of oxidizing compounds.Sesame seed contains about 20% protein that reaches 50% in the defatted seed. The major asset of sesame protein is its unique nutritional character, with high levels of the essential amino acids methionine and tryptophan. An in-vivo study on the nutritional quality of sesame protein demonstrated a significant decrease in total cholesterol and triglycerides upon consumption of the seeds.The carbohydrate content of sesame seed is about 18-20%, most of which is present as dietary fibers. Sesame seed is rich in several mineral constituents, but their nutritive value has not been studied thoroughly.Important nutrients iron, zinc and calcium, which are often deficient in modern human diets, are found in sesame seeds at relatively high concentrations.While sesame seed is one of the oldest oilseed crops known, and the nutritional quality of its seeds is recognized, its growth is limited due a significant loss of yield during mechanical harvest of the seeds. Attempts at developing desirable sesame lines suitable for mechanical harvest have been made, addressing particularly the dehiscence characteristics of the capsules. U.S. Patent Nos. 6,100,452; 8,080,707; 8664472; 8581028; and 8993835, all to Sesaco Corporation, disclose non-dehiscent sesame cultivars having various characteristics and methods of producing same.There still an unmet need for, and it would be highly beneficial to have, sesame PCT/IL2016/051337 WO 2017/103928 plants having indehiscent capsules that produce high yield of seeds with improved nutritional quality.
SUMMARY OF THE INVENTION The present invention provides sesame plants that are exceptionally suitable for commercial production of high quality seeds. Particularly, the plants of the invention substantially retain all seeds within the plant capsule before harvest and shatter the seeds from the capsule only upon mechanical force, typically during mechanical harvest. The plants of the invention are elite cultivars producing high seed yields. Furthermore, the seeds produced by the plants of the invention are of high quality, comprising elevated amounts of micronutrients, particularly iron.
The present invention is based in part on the unexpected discovery of a linkage of the indehiscence phenotype to single nucleotide polymorphism (SNP) located on sesame linkage group (LG)-8. Furthermore, the present invention now shows that introgression of a minimal segment of LG-8 comprising the SNP or linked thereto into at least one cell of a plant confers to the plant not only a phenotype of indehiscent capsules but also an elevated seed concentration of calcium, iron and zinc.
According to one aspect, the present invention provides a sesame crop plant having a genetic element comprising a quantitative trait locus (QTL) conferring indehiscence phenotype to the plant, the QTL corresponds to a segment of wild type Sesamum indicum linkage group (LG)-8 spanning from position 5,162,951 to 7,447,2or part thereof wherein the QTL nucleic acid sequence comprises at least one mutation compared to the wild type LG-8.
According to some embodiments, the QTL comprises at least one SNP. According to some embodiments, the SNP is selected from the group consisting of: T (Thymine) at position 5,176,856 on LG-8, T (Thymine) at position 5,207,071 on LG-8, A (Adenine) at position 5,164,512 on LG-8, G (Guanine) at position 5,107,812 on LG-8, A (Adenine) at position 5,448,993 on LG-8, and any combination thereof. Each possibility represents a separate embodiment of the invention. According to certain embodiments, the SNP is T (Thymine) at position 5,176,856 on LG-8.
According to some embodiments, the sesame crop plant is homozygous for a PCT/IL2016/051337 WO 2017/103928 genetic element comprising said quantitative trait locus (QTL).
According to an additional aspect, the present invention provides a sesame crop plant having a genetic element comprising a quantitative trait locus (QTL) having a genetic linkage to at least one SNP, wherein said SNP is located within Sesamum indicum linkage group (LG)-8, said SNP is selected from the group consisting of: T (Thymine) at position 5,176,856 on LG-8, T (Thymine) at position 5,207,071 on LG-8, A (Adenine) at position 5,164,512 on LG-8, G (Guanine) at position 5,107,812 on LG- 8, A (Adenine) at position 5,448,993 on LG-8, and any combination thereof, said QTL nucleic acid sequence comprises at least one mutation compared to the nucleic acids sequence of a wild type Sesamum indicum and wherein the QTL confers indehiscence phenotype to the plant.
According to yet additional aspect, the present invention provides a sesame crop plant having a genetic element comprising a quantitative trait locus (QTL) having a genetic linkage to position 5,176,856 on Sesamum indicum linkage group (LG)-8, said QTL nucleic acid sequence comprises at least one mutation compared to the nucleic acids sequence of a wild type Sesamum indicum, wherein the QTL confers indehiscence phenotype to the plant.
According to certain embodiments, the SNP is T (Thymine) at position 5,176,8on LG-8.
According to certain embodiments, the plant comprising the QTL is characterized by closed capsules when said plant reaches full physiological maturity. According to certain embodiments, the mature plant is dry. According to some embodiments, the dry plant stands at the field. According to additional embodiments, the capsules are closed four weeks after the plant reaches full physiological maturity.
According to certain embodiments, the sesame plant comprises seeds having elevated content of at least one nutrient selected from the group consisting of zinc, iron, calcium and any combination thereof compared to the at least one nutrient content in seeds of a corresponding sesame crop plant lacking said QTL. Each possibility represents a separate embodiment of the present invention.
According to some embodiments, the sesame plant comprises seeds having at least 5%, 10%, 15%, 20%, 25%, or 30% more iron compared to seeds of a PCT/IL2016/051337 WO 2017/103928 corresponding sesame crop plant lacking said QTL. Each possibility represents a separate embodiment of the invention.
According to some embodiments, the sesame plant comprises seeds having at least 5%, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, or 50% more zinc compared to seeds of a corresponding sesame crop plant lacking said QTL. Each possibility represents a separate embodiment of the invention.
According to certain embodiments, the QTL comprises a nucleic acid sequence at least 90% homologous to a nucleic acid sequence located within position 5,162,951 and position 7,447,238 of Sesamum indicum LG-8, said sequence comprises at least nucleic acid residues. According to other embodiments, the QTL comprises a nucleic acid sequence at least 90% homologous to a nucleic acid sequence located within position 5,162,951 and position 5,515,472 of Sesamum indicum LG-8. According to some embodiments, said nucleic acid sequence has at least one SNP. According to certain exemplary embodiments, the SNP is selected rom the group consisting of: T (Thymine) at position 5,176,856 on LG-8, T (Thymine) at position 5,207,071 on LG-8, A (Adenine) at position 5,164,512 on LG-8, G (Guanine) at position 5,107,812 on LG- 8, A (Adenine) at position 5,448,993 on LG-8, and any combination thereof. According to certain exemplary embodiments, the nucleic acid sequence comprises T (Thymine) at position 5,176,856 on LG-8.
According to certain exemplary embodiments, the QTL comprises the nucleic acid sequence set forth in SEQ ID NO:l. According to other exemplary embodiments, the QTL consists of the nucleic acid sequence set forth in SEQ ID NO:l.
According to certain embodiments of the invention, the genetic element consists of the QTL described hereinabove.
According to certain embodiments, the sesame plant is an inbred plant.
According to some embodiments, the sesame plant is a transgenic plant.
Advantageously, introgression of the QTL into a sesame plant according to the teachings of the present invention does not result in introgression of non-desired traits. Accordingly, the sesame plant of the invention is a cultivar suitable for commercial growth of sesame seeds, but it is not limited to a specific strain or variety.
PCT/IL2016/051337 WO 2017/103928 According to certain embodiments, the sesame crop plant comprising the QTL produces higher seed yield compared to a corresponding sesame crop plant lacking the QTL. According to some exemplary embodiments, the sesame crop plant comprising the QTL produces at least 10% higher seed yield compared to a corresponding sesame crop plant lacking the QTL. According to some embodiments, the higher seed yield is obtained by mechanical harvesting. According to some embodiments, the mechanical harvesting is by a combine harvester. Other agronomical traits, including, but not limited to, growth rate, resistance to abiotic stresses and resistance to biotic stress are at least equivalent to corresponding sesame crop plant lacking the QTL.
It is to be explicitly understood that the sesame crop plants of the present invention are fertile, and seeds of said plants are explicitly encompassed within the scope of the present invention. Seeds as well as any other plant part that can be used for propagation, including isolated cells and tissue cultures are also encompassed within the scope of the present invention. It is to be understood that the plant produced from said seeds or other propagating material comprises the QTL. Plants grown from seeds homozygous for the QTL are indehiscent as described herein.
According to an additional aspect, the present invention provides a method for producing sesame plants having indehiscent capsules at maturity, the method comprising: introducing into at least one cell or part of a sesame plant having dehiscent capsules a genetic element comprising a QTL according to the invention. According to some embodiments, the QTL comprises at least one SNP. According to additional embodiments, the SNP is selected from the group consisting of: T (Thymine) at position 5,176,856 on LG-8, T (Thymine) at position 5,207,071 on LG-8, A (Adenine) at position 5,164,512 on LG-8, G (Guanine) at position 5,107,812 on LG-8, A (Adenine) at position 5,448,993 on LG-8, and any combination thereof. Each possibility represents a separate embodiment of the invention. According to certain embodiments, the SNP is T (Thymine) at position 5,176,856 of Sesamum indicum LG-8, thereby producing a sesame plant characterized by indehiscent capsules at maturity. According to additional embodiments, the QTL have a genetic linkage to a SNP as described hereinabove.
Any method as is known in the art can be used to introduce the genetic element comprising the QTL into a sesame plant.
PCT/IL2016/051337 WO 2017/103928 According to certain exemplary embodiments, the genetic element is introduced by introgression.
According to other embodiments, the genetic element is introduced by transformation.
According to some embodiments, the present invention discloses hitherto unknown specific SNPs located within a QTL corresponding to sesame LG-8 or having a genetic linkage to said QTL that confer indehiscent phenotype to sesame plants naturally producing dehiscent capsules.
According to another aspect, the present invention provides an isolated polynucleotide comprising a nucleic acid sequence conferring indehiscent phenotype to a sesame plant, said nucleic acid sequence is at least 90% homologous to a nucleic acid sequence located within position 5,162,951 and position 7,447,238 of Sesamum indicum LG-8, said nucleic acid sequence comprises at least 80 nucleic acid residues. According to other embodiments, the isolated polynucleotide is at least 90% homologous to a nucleic acid sequence located within position 5,162,951 to position 5,515,472 of Sesamum indicum LG-8, nucleic acid sequence comprises at least 80 nucleic acid residues. According to some embodiments, said sequence has at least one SNP. According to some embodiments, the SNP is selected from the group consisting of: T (Thymine) at position 5,176,856 on LG-8, T (Thymine) at position 5,207,071 on LG-8, A (Adenine) at position 5,164,512 on LG-8, G (Guanine) at position 5,107,812 on LG- 8, A (Adenine) at position 5,448,993 on LG-8, and any combination thereof. According to specific embodiments, the SNP is T (Thymine) at position 5,176,856 on LG-8. According to additional embodiments, the isolate polynucleotide comprises the nucleic acid sequence selected from the group consisting of: SEQ ID NO:l, SEQ ID NO:2, SEQ ID NOG, SEQ ID NO:4, SEQ ID NOG, and any combination thereof. Each possibility represents a separate embodiment of the invention. According to certain exemplary embodiments, the isolated polynucleotide comprises the nucleic acid sequence set forth in SEQ ID NO:l. According to certain additional exemplary embodiments, the isolated polynucleotide consists of the nucleic acid sequence set forth in SEQ ID NO: 1.
According to yet another aspect, the present invention provides a method for PCT/IL2016/051337 WO 2017/103928 identifying sesame plants having indehiscent phenotype, comprising detecting a QTL corresponding to LG8 of Sesamum indicum comprising an SNP selected from the group consisting of: T (Thymine) at position 5,176,856 on LG-8, T (Thymine) at position 5,207,071 on LG-8, A (Adenine) at position 5,164,512 on LG-8, G (Guanine) at position 5,107,812 on LG-8, A (Adenine) at position 5,448,993 on LG-8, and any combination thereof or having a genetic linkage to said SNP genomic localization in isolated genetic material obtained from the plant. Any method as is known in the art for isolating genetic material from at least a part of the sesame plant and for detecting the QTL in the genetic material can be used according to the teachings of the present invention.
According to certain exemplary embodiments, the QTL comprises the nucleic acid sequence set forth in SEQ ID NO:l. According to these embodiments, identifying sesame plants having indehiscent phenotype is performed by identifying SEQ ID NO:l in the sesame plant. According to some embodiment, SEQ ID NO:l is identified using a pair of amplification primers. According to certain exemplary embodiments, the pair of amplification primers comprises the nucleic acid sequence set forth in SEQ ID NO:(CGTCCTCGCTACATAATCCA) and SEQ ID NO:7(TTGGATCT AC ACGAGAGGTGA).
Further embodiments and the full scope of applicability of the present invention will become apparent from the detailed description given hereinafter. However, it should be understood that the detailed description and specific examples, while indicating preferred embodiments of the invention, are given by way of illustration only, since various changes and modifications within the spirit and scope of the invention will become apparent to those skilled in the art from this detailed description.
BRIEF DESCRIPTION OF THE FIGURES FIG. 1shows the visual difference between open capsules (Figure 1A) and closed capsules (Figure IB).
FIG.2is a representative picture of F2 population grown in a net-house.
FIG. 3shows microscopy characterization of the dehiscence zone. Transverse sections in the middle of sesame capsule, 46 days after flowering. Figure 3A: two representative PCT/IL2016/051337 WO 2017/103928 images of indehiscent parental line, S-91 (left images; right - enlarged images as indicated). Figure 3B: two representative images of the dehiscent parental line, S-2(left images; right - enlarged images as indicated). Figure. 3C: two representative images of F2 indehiscent offspring from a cross between S-91 x S-297 (left images; right - enlarged images as indicated). Bar=200pm.
FIG. 4shows Fligh Resolution Melt (HRM) graph of parental lines using HUSiOOl marker based on the SNP found on LG8. Indehiscent parent, S-91, and the dehiscent parent, S-297, marked as "M" and "Wt" respectively (Two replicates each).
FIG. 5shows HRM graph of dehiscent S-297 and S-65 (WT), indehiscent S-91 (M) lines and several backcross lines (H). The backcross (BC!F!) derived from a cross between the indehiscent F2 offspring and his dehiscent parent.
FIG. 6shows HRM graph of several F2 lines sharing a mutual parent (S-91). Lines with indehiscence capsule phenotype (CC) and lines with WT (dehiscence) capsule phenotype (OC).
FIG. 7shows HRM graph of parental lines using HUSi002 (Figure 7A), HUSi0(Figure 7B), HUSi004 (Figure 7C) and HUSi005 (Figure 7D) markers based on SNPs found on LG8. Indehiscent parent, S-91, and the dehiscent parent, S-297 are indicated.
DETAILED DESCRIPTION OF THE INVENTION The present invention discloses for the first time a QTL corresponding to linkage group 8 of Sesamum indicum. The QTL comprises a genetic linkage to a single nucleotide polymorphism (SNP) T (tyrosine) instead of C (Cytosine), and is associated with the phenotype of closed (indehiscent) fully ripen capsules. The seeds within the indehiscent capsules comprise elevated seed concentration of zinc, iron and calcium. The present invention thus provides sesame plants comprising the QTL characterized by indehiscent capsules and methods of producing same. The present invention further provides isolated polynucleotides comprising the QTL or parts thereof useful in identifying indehiscent sesame plants. Advantageously, the sesame seeds remain in the sesame capsules even after the plant dries, which allows for a mechanical harvesting by a combine with a minimal loss of yield. Then, the combine can open the capsule and release the seeds as it is harvested. In addition, the sesame plant holds its seeds in PCT/IL2016/051337 WO 2017/103928 capsules for four or more weeks after fully ripening, enabling flexibility in harvesting time.
DefinitionsThe term "plant" is used herein in its broadest sense. It also refers to a plurality of plant cells that are largely differentiated into a structure that is present at any stage of a plant's development. Such structures include, but are not limited to, a root, stem, shoot, leaf, flower, petal, fruit, etc. According to certain exemplary embodiments, the sesame plants of the present invention are hardy cultivars grown for commercial production of sesame seeds.
As used herein, the term "plant part" typically refers to a part of the sesame plant, including single cells and cell tissues such as plant cells that are intact in plants, cell clumps and tissue cultures from which sesame plants can be regenerated. Examples of plant parts include, but are not limited to, single cells and tissues from pollen, ovules, leaves, embryos, roots, root tips, anthers, flowers, fruits (capsules), stems, shoots, and seeds; as well as pollen, ovules, leaves, embryos, roots, root tips, anthers, flowers, fruits, stems, shoots, scions, rootstocks, seeds, protoplasts, calli, and the like.
The terms "dehiscence" or its adjective "dehiscent" as used herein with reference to a sesame plant or a sesame capsule (fruit) refer to a plant characterized by capsules or to the capsules per se that are visibly open when fully ripen (matured). The terms "indehiscence" or its adjective "indehiscent" as used herein with reference to a sesame plant or a sesame capsule (fruit) refer to a plant characterized by capsules or to the capsules per se that are visibly closed when fully ripen (matured). Without wishing to be bound by any specific theory or mechanism of action, the indehiscence phenotype is associated with increased number of cell layers between the median vascular bundle and the pericarp and the small numbers of cells with thin walls at this area. As a result, the tension force applied on the endocarp by the shrinking mesocarp upon dryness does not result in the rupture of the capsule wall.
The term "locus" (plural "loci") is defined herein as the position that a given gene occupies on a chromosome or a linkage group of a given species.
As used herein, the term "linkage group" refers to all of the genes or genetic traits PCT/IL2016/051337 WO 2017/103928 that are located on the same chromosome. Within the linkage group, those loci that are close enough together will exhibit linkage in genetic crosses. Since the probability of crossover increases with the physical distance between genes on a chromosome, genes whose locations are far removed from each other within a linkage group may not exhibit any detectable linkage in direct genetic tests. The term "linkage group" is mostly used to refer to genetic loci that exhibit linked behavior in genetic systems where chromosomal assignments have not yet been made. Thus, in the present context, the term "linkage group" is synonymous to (the physical entity of) chromosome.
The term "QTL" (Quantitative Trait Loci) is used herein in its art-recognized meaning. The term QTL corresponding to sesame LG-8 that comprises or has a genetic linkage to an SNP selected from the group consisting of: T (Thymine) at position 5,176,856 on LG-8, T (Thymine) at position 5,207,071 on LG-8, A (Adenine) at position 5,164,512 on LG-8, G (Guanine) at position 5,107,812 on LG-8, A (Adenine) at position 5,448,993 on LG-8, and any combination thereof. The QTL according to the invention comprises at least one mutation. The term "QTL conferring indehiscent phenotype" refers to a region located on a particular linkage group of Sesamum indicum as described herein that may be associated with at least one gene that encodes for the indehiscent characteristics of the plant and/or for a regulatory region, i.e. a region of a chromosome that controls the expression of one or more genes involved in indehiscence. The phenotypic expression of that putative gene and/or regulatory region is typically closed capsules of a sesame plant standing in the field and ready for harvest. A QTL may for instance comprise one or more genes the products of which confer the indehiscence phenotype. Additionally or alternatively, a QTL may for instance comprise regulatory genes or sequences the products of which influence the expression of genes on other loci in the genome of the plant thereby conferring the indehiscence phenotype. The QTL of the present invention may be defined by indicating its genetic location in the genome of the respective Sesamum indicum accession using one or more markers. According to some embodiments, The QTL of the present invention is defined by the presence of "T" (Thymine) at position 5,176,856.
The term "homozygous" as is used herein means a genetic condition existing when identical alleles reside at corresponding loci on homologous chromosomes.
PCT/IL2016/051337 WO 2017/103928 As used herein, the term "inbred" means a substantially homozygous individual plant or plant line.
The terms "introgression", "introgressed" and "introgressing" refer to the transmission of a desired allele(s) of a gene or trait locus from a genetic background of one species, variety or cultivar into the genome of another species, variety or cultivar. In one method, the desired allele(s) can be introgressed through a sexual cross between two parents, wherein one of the parents has the desired allele in its genome. The desired allele can include desired gene or genes, a marker locus, a QTL or the like.
The term "genetic element" is used in its broadest sense and includes a series of two or more nucleotides. The genetic element of the present invention comprises a mutated quantitative trait locus as described herein.
The terms "corresponding" or "corresponds" are used herein to describe the correlation between the QTL and a sequence such as Sesamum indicum linkage group (LG)-8, and refer to a position or region within a polynucleotide sequence that is identified by comparison to a reference sequence. The reference sequence is a wild-type form of the Sesamum indicum linkage group (LG)-8 sequence. In other words, the QTL sequence is identical to a sequence spanning from position 5,162,951 to 7,447,238 or part thereof of LG-8 except for at least one mutation. The mutation within the QTL may be, without limiting, a SNP, a deletion, or an insertion.
According to certain embodiments, the QTL sequence comprises at least 1contiguous nucleic acids identical to the wild type Sesamum indicum linkage group (LG)-8 except of the at least one mutation.
As used herein, the term "population" refers to a genetically heterogeneous collection of plants sharing a common genetic derivation.
According to one aspect, the present invention provides a sesame crop plant homozygous for a genetic element comprising a quantitative trait locus (QTL) comprising a single nucleotide polymorphism (SNP), wherein the QTL is derived from Sesamum indicum linkage group (LG)-8 and wherein the QTL confers indehiscence phenotype to the plant.
According to some embodiments, the SNPs are ad described above. According to 30 PCT/IL2016/051337 WO 2017/103928 certain embodiments, the SNP is T (Thymine) at position 5,176,856 on LG-8.
According to certain embodiments, the QTL comprises a nucleic acid sequence homologous to Sesamum indicum LG-8 sequence from position 5,162,951 to position 7,447,238. According to other embodiments, the QTL comprises a nucleic acid sequence homologous to sesame LG-8 sequence from position 5,162,951 to position 5,515,472. According to some embodiments, said nucleic acid sequence has at least one SNP. According to certain exemplary embodiments, the SNP is T (Thymine) at position 5,176,856 on LG-8.
The term "homologous" as used herein denotes a characteristic of a nucleic acid sequence, wherein a nucleic acid sequence has at least about 85 percent sequence identity as compared to a reference sequence, typically at least about 90 percent sequence identity, or at least about 95 percent sequence identity as compared to a reference sequence. The reference sequence may be a subset of a larger sequence, such as a portion of a chromosome, typically at least about 50 to 100 nucleotides long.
According to an additional aspect, the present invention provides a sesame crop plant having a genetic element comprising a quantitative trait locus (QTL), said QTL maps to a position between position 5,107,812 and position 5,448,993 on LG-8, said QTL nucleic acid sequence comprises at least one mutation and wherein said QTL confers indehiscence phenotype to the plant.
According to an additional aspect, the present invention provides a sesame crop plant comprising a genetic element comprising a quantitative trait locus (QTL), said QTL comprises genetic linkage to at least one SNP or its genomic localization, said SNP is selected from the group consisting of: T (Thymine) at position 5,176,856 on LG- 8, T (Thymine) at position 5,207,071 on LG-8, A (Adenine) at position 5,164,512 on LG-8, G (Guanine) at position 5,107,812 on LG-8, A (Adenine) at position 5,448,9on LG-8, and any combination thereof.
According to certain exemplary embodiments, the QTL comprises the nucleic acid sequence set forth in SEQ ID NO:2. According to these embodiments, identifying sesame plants having indehiscent phenotype is performed by identifying SEQ ID NO:in the sesame plant. According to some embodiment, SEQ ID NO:2 is identified using a pair of amplification primers. According to certain exemplary embodiments, the pair of PCT/IL2016/051337 WO 2017/103928 amplification primers comprises the nucleic acid sequence set forth in SEQ ID NO:(C AGT AACCGCCCTTT GT GA) and SEQ ID NO:9(C A A ATGCGATT A A A AGTGA A AC A).
According to certain exemplary embodiments, the QTL comprises the nucleic acid sequence set forth in SEQ ID NOG. According to these embodiments, identifying sesame plants having indehiscent phenotype is performed by identifying SEQ ID NOG in the sesame plant. According to some embodiment, SEQ ID NOG is identified using a pair of amplification primers. According to certain exemplary embodiments, the pair of amplification primers comprises the nucleic acid sequence set forth in SEQ ID NO: (AGGGAGCGTTCTTCGGATA) and SEQ ID NO: 11(CGCCTC ATT AGAGGGC AGT).
According to certain exemplary embodiments, the QTL comprises the nucleic acid sequence set forth in SEQ ID NOG. According to these embodiments, identifying sesame plants having indehiscent phenotype is performed by identifying SEQ ID NOG in the sesame plant. According to some embodiment, SEQ ID NOG is identified using a pair of amplification primers. According to certain exemplary embodiments, the pair of amplification primers comprises the nucleic acid sequence set forth in SEQ ID NO: (GGTCCGAGAGAGCTGTTTTC) and SEQ ID NO: 13(AT C AC A ACT CG ACCT GCTT G).
According to certain exemplary embodiments, the QTL comprises the nucleic acid sequence set forth in SEQ ID NOG. According to these embodiments, identifying sesame plants having indehiscent phenotype is performed by identifying SEQ ID NOG in the sesame plant. According to some embodiment, SEQ ID NOG is identified using a pair of amplification primers. According to certain exemplary embodiments, the pair of amplification primers comprises the nucleic acid sequence set forth in SEQ ID NO: (GCAGCCAGGGTGGCTTAT) and SEQ ID NO: 15(GCACTAGCCGATATGTGCTTT).
The present invention discloses for the first time a genetic configuration resulting in indehiscence phenotype of a sesame plant. Plants comprising such configuration produce capsules that are kept closed when the plant reach maturity and dries; produce seeds with elevated amounts of significant nutrients including iron, zinc and/or calcium; PCT/IL2016/051337 WO 2017/103928 and produce high seed yield.
The genetic unit "QTL" indicates a region on the genome that is directly related to a phenotypic quantifiable trait, the indehiscent phenotype according to the present invention. The QTL of the present invention has been first observed in F2 population of a cross between a dehiscent line (S-297) and the mutated indehiscent line (S-91) produced by the inventors. The QTL was found to be associated with at least one marker, an SNP of T (Thymine) at position 5,176,856 of LG-8 instead of C (cytosine). The QTL of the invention may include one or more genes, which may or may not be related to the indehiscent phenotype.
As described in the Example section hereinbelow, an efficient High Resolution Melt (HRM) marker was developed based on the identified SNP detected on LG-8. Amplification of a QTL fragment comprising the SNP was performed using the primers having the nucleic acids sequences set forth in SEQ ID NO:2 (forward) and SEQ ID NOG (reverse). The resulted amplicon contained 84 nucleic acids. The mutated amplicon comprising the SNP consists of SEQ ID NO:l. The marker was tested by HRM on the parental lines as well as on F! and F2 progenies in order to test its efficiency (Figures 4-6) and was found to be highly efficient. The efficiency was also demonstrated with various other crosses (data not shown).
The present invention further provides a method for identifying sesame plants having indehiscent phenotype, comprising detecting a mutated QTL corresponding to LG-8 of Sesamum indicum comprising SNP of T (Thymine) at position 5,176,856 in an isolated genetic material obtained from the plant. It is to be explicitly understood that the SNP marker identified in the present invention is an example of markers suitable for use in marker assisted selection (MAS) procedures. Additional markers associated with the QTL conferring indehiscence phenotype, as such markers may exist, are also encompassed within the scope of the present invention.
The present invention further provides a method for producing sesame plant characterized by indehiscent capsules at maturity, the method comprises introducing into at least one cell or part thereof of a sesame plant characterized by dehiscent capsule a genetic element comprising a QTL derived from LG-8 of Sesamum indicum plant characterized by indehiscent capsule, the QTL comprises an SNP of T (Thymine) at PCT/IL2016/051337 WO 2017/103928 position 5,176,856, thereby producing a sesame plant characterized by indehiscent capsules at maturity.
Introducing the genetic element comprising the QTL conferring indehiscent phenotype according to the teachings of the present invention can be performed by any method as is known to a person skilled in the art. It is to be explicitly understood that in the sesame plant produced, the segment comprising the QTL is not in its natural background. As used herein, the term "natural genetic background" indicates the original genetic background of a QTL. Such a background is the genome of the mutated Sesamum indicum produced as described herein. Accordingly, S. indicum line S-represents the natural genetic background of the QTL of the invention. A method involving the transfer of DNA comprising the QTL from linkage group 8 of S. indicum to the same or different position on the corresponding linkage group of another S. indicum lines will result in that the QTL or part thereof not being in its natural genetic background.
Alternatively, nucleic acid (preferably DNA) sequence comprising the QTL of the present invention or any part thereof that can confer indehiscence phenotype as disclosed herein may be used for the production of indehiscent sesame plants. According to certain embodiments, the QTL is introduced into dehiscent sesame plant, typically a cultivar suitable for commercial growth. According to the teachings of the present invention, said nucleic acid sequence is derived from mutated S. indicum donor plant.
The QTL conferring indehiscence phenotype can be isolated from the donor plant by using any method as is known in the art.
The QTL sequence may be transferred to a recipient sesame plant by any method as is known to a person skilled in the art. According to certain embodiments, the QTL can be introduced by crossing the donor with a recipient dehiscent sesame plant (i.e. by introgression). Alternatively, isolated nucleic acid sequence comprising the QTL can be introduced by transformation as described hereinbelow. Transformation is optionally followed by selection of offspring plants comprising the QTL and exhibiting indehiscence phenotype.
Transforming plants with isolated nucleic acid sequence generally involves the PCT/IL2016/051337 WO 2017/103928 construction of an expression vector that will function in plant cells. According to the teachings of the present invention, such a vector comprises the QTL of the invention or part thereof. Typically, the vector comprises the QTL under control of or operatively linked to a regulatory element. According to certain embodiments, the regulatory element is selected from the group consisting of a promoter, enhancer, a translation termination sequence, and any combinations thereof. The vector(s) may be in the form of a plasmid, and can be used, alone or in combination with other plasmids, in a method for producing transgenic indehiscent sesame plants.
Expression vectors can include at least one marker (reporter) gene, operably linked to a regulatory element (such as a promoter) that allows transformed cells containing the marker to be either recovered by negative selection (by inhibiting the growth of cells that do not contain the selectable marker gene), or by positive selection (by screening for the product encoded by the markers gene). Many commonly used selectable marker genes for plant transformation are known in the art, and include, for example, genes that code for enzymes that metabolically detoxify a selective chemicalagent which may be an antibiotic or an herbicide, or genes that encode an altered target which is insensitive to the inhibitor. Several positive selection methods are known in the art, such as mannose selection. Alternatively, the presence of the QTL in the transformed plant is identified using the marker of the present invention.
Methods for transforming a plant cell with nucleic acids sequences according tothe present invention are known in the art. As used herein the term "transformation" or "transforming" describes a process by which a foreign nucleic acid sequence, such as a vector, enters and changes a recipient cell into a transformed, genetically modified or transgenic cell. Transformation may be stable, wherein the nucleic acid sequence is integrated into the plant genome and as such represents a stable and inherited trait, or transient, wherein the nucleic acid sequence is expressed by the cell transformed but is not integrated into the genome, and as such represents a transient trait. According to typical embodiments the nucleic acid sequence of the present invention is stably transformed into a plant cell.
The following examples are presented in order to more fully illustrate some embodiments of the invention. They should, in no way be construed, however, as30 PCT/IL2016/051337 WO 2017/103928 limiting the broad scope of the invention. One skilled in the art can readily devise many variations and modifications of the principles disclosed herein without departing from the scope of the invention.
EXAMPLES Materials and Methods Phenotypic measurements Phenotyping the trait for capsule dehiscence was conducted at the end of plants growth, when the plant had dried and reached full physiological maturity. Each plant from the F2 population and both of the parental lines were marked as "open" or "closed" capsule.
Micronutrients analysisSesame seeds were grind in a coffee grinder for 5-10 sec each. A batch of each sample (about 250 mg of dry material) was digested in 8 ml of 65 % HN03 and 2 ml of 30% H202- Internal standard Yttrium (Y) was used to control digestion process quality and possible matrix effects. Digestion was carried out in Teflon vessels using a "Milestone Ethos 1" microwave-digestion-system at high temperature and pressure. During 20 min the temperature inside the vessel was increased linearly to 180 °C using 900W energy, then the temperature was maintained during next 15 min at 180°C. Vessels were cooled down and the volume was made up to 25 ml with deionized water. Micronutrient concentration was measured in the clear solutions using a radial ICP-OES model ‘ARCOS’ from Spectro GMBH, Germany, equipped with cross-flow nebulizer and Scott spray chamber. Measurements were calibrated with standards for ICP from Merck. Element concentrations that exceed the linear dynamic range were diluted and reanalysed. Dilution was made using calibrated pipettes. The continuing calibration verification standard was measured at least every 10 samples to check the instrument stability.
Example 1: Development of an indehiscent sesame line Sesame plants characterized by closed capsules at maturity were developed by PCT/IL2016/051337 WO 2017/103928 mutagenesis of sesame seeds. Seeds from a collection of dehiscent sesame plants were used. Follow calibration, the sesame seeds were soaked in ddH20 for 4 hours, and then treated with 1% of Ethyl methanesulfonate (EMS) for 24 hours at room temperature (24°C). After treatment, the seeds were washed for 4 hours under running water. The washed seeds were sown in planting trays with clay and grown until four leaves stage (14-20 days) and then transplanted into the field (Mo plants).
The seeds produced by the Mo plants (M! generation) were collected and after cleaning they were sown in the field to get M2 seeds. M2 seeds were sown in the field and the resulting plants were characterized for indehiscence capsule phenotype. Characterization was made by visible differentiation between open capsules (Figure 1 A) and closed capsules (Figure IB). About 120,000 M2 plants were screened in the field.
The obtained M2 plant was backcrossed with the parental line for three generations to get homozygote line. The homozygous line, designated S-91, was used for the production of the mapping population.
Example 2: Production of mapping population An indehiscent line (S-91) was crossed with dehiscent line (S-297) and the F! progeny was selfed to produce an F2 mapping population of 148 lines. This population, alongside with the two parental lines was grown in insect proof net-house (Figure 2). The plants were phenotyped for morphological, physiological and yield components and for quality traits.
Microscopy characterization of the dehiscence zone was performed for the indehiscent line (S-91), the dehiscent line (S-297) and for a representative Findehiscent line. Figure 3 shows transverse sections in the middle of sesame capsule, days after flowering. The clear rupture of the capsule of the dehiscent capsule (Figure 3B) is missing from the indehiscent capsules (Figures 3A and 3C).
Example 3: OTL analysis The mapping population was genotyped using genotype-by-sequencing (GBS), performed by Energin R Technologies 2009 LTD. (NRGene, http://nrgene.com). A PCT/IL2016/051337 WO 2017/103928 high-density genetic map was constructed (including about 20,000 SNPs). QTLs analysis was conducted on the F2 population and revealed the genetic location of the indehiscence and seed nutrient traits (Table 1). An SNP at position 5,176,856 was identified, with the dehiscent plants comprising "C" (Cytosine) at this location and the indehiscent plant comprising "T" (Thymine) at this location. Based on the identified SNP detected on LG-8, an efficient High Resolution Melt (HRM) marker was developed (Figure 4). The amplification primers included a left primer having the nucleic acid sequence set forth in SEQ ID NO:6 (CGTCCTCGCTACATAATCCA) and a right primer having the nucleic acid sequence set forth in SEQ ID NO:(TTGGATCTACACGAGAGGTGA). The amplification product comprises 84 nucleic acids (SEQ ID NO:l): CGT CCT CGCT ACATAATCCAACT GT ACT GG AT A A AGCTT AT GAT GTT CAT GT TTGTGACACAATCACCTCTCGTGTAGATCCAA (the SNP is marked within a rectangle). This marker was tested on the parental lines as well as F! and F2 progenies in order to test its efficiency (Figures 4-6).
Table 1:Major QTLs detected on LG-8 for the indehiscence trait (qualitative: open vs.close) and seed nutrient (iron, zinc and calcium) concentration.
Trait name LG starts LG ends Peak start Peak ends P-value R2 LOD score Capsule 5,162,951 5,515,472 5,162,951 5,515,472 0 1 Inf.dehiscenceSeed Calcium 4,497,023 7,823,496 5,162,951 6,306,717 2.07E-08 0.214 7.84Seed Iron 4,374,000 9,570,814 5,162,951 7,447,238 1.65E-08 0.216 7.94Seed Zinc 4,374,000 7,667,265 5,162,951 7,125,811 3.04E-20 0.457 19.92 Example 4: Seed nutrient concentration Micronutrient analysis was performed in seeds of the indehiscent line developed in the present invention (S-91) and of the dehiscent line (S-297) as described in "Material and Methods" hereinabove. Table 2 present elevated amounts of all nutrients examined in seeds produced by indehiscent plants comprising the SNP marker. A significant increase in the amount of zinc (55%), iron (30%) and calcium (12%) was found (Table 2). This result is of high significance, as food sources of zinc and iron are PCT/IL2016/051337 WO 2017/103928 highly desired.
Table 2:Concentration of calcium, iron and zinc in seeds of S-91 and S-297.
Genotype Seed nutrient concentrations (mg/kg) Calcium Iron Zinc S-91 12193.324* 108.561* 92.912* S-297 10386.674 82.978 60.083* Indicate significant differences between the two sesame genotypes (student-t test) atP< 0.05.
Example 5: Plant material tested with HUSiOOl HRM Marker In order to test HUSiOOl marker efficiency in differentiating between dehiscence and non-dehiscence capsules under different genetic backgrounds, non-dehiscent line S- were crossed with 28 dehiscent lines from the Hebrew University collection (S-4, S- 8, S-10, S-34, S-37, S-43, S-46, S-47, S-53, S-59, S-64, S-65, S-67, S-79, S-80, S-92, S- 100, S-110, S-274, S-278, S-289, S-301, S-308 S-313, S-315, S-316, S-326, S-1038). The FI hybrids were grown in a net-house and seeds were collected from each FI plants. F2 seeds were sown in the field (10 seeds from each cross) and characterized for capsule morphology. Young leaves from 5-8 plants of each cross were collected (1samples in total) and used for DNA extraction. All samples were analyzed in HRM with HUSiOOl marker and resulted in 100% ability of the HUSiOOl to differentiate between dehiscence and non-dehiscence capsule.
Additionally, HUSiOOl marker was used for backcross screening. Two indehiscent F2 were chosen from 3 different families: plants #55 and #149 from S-91xS- 297, #53 and #166 from S-91xS-65, and #57 and #92 from S-8xS-91. The plants were correspondingly backcrossed with the dehiscent parent (i.e. S-297, S-65 or S-8) in order to create near isogenic lines (NILs). Each backcross generation was scanned with HUSiOOl marker to ensure successful fertilization; 66 BC1F!, 23 BC2F!, 78 BC2F2, and 174 BC3F! plants were scanned.
PCT/IL2016/051337 WO 2017/103928
Claims (5)
1.IL259853/ CLAIMS1. A sesame crop plant or a part thereof having a genetic element comprising a quantitative trait locus (QTL) conferring an indehiscence phenotype to the plant, the QTL comprising a segment of linkage group (LG)-8 spanning from position 5,162,951 to 7,447,238 wherein the QTL is present in the genome of a Sesamum indicum S-91 plant, seeds of which have been deposited with NCIMB Ltd. as the International Depositary Authority under Accession No. NCIMB 43877, wherein the QTL comprises the nucleic acid sequence set forth in SEQ ID NO:1, and wherein the sesame crop plant is characterized by closed capsules when said plant reaches full maturity and by seeds having elevated content of zinc, iron, and calcium compared to seeds of a corresponding sesame crop plant lacking the QTL.
2. A seed of the sesame crop plant of claim 1, wherein said seed comprises the QTL.
3. A method for producing sesame plants having indehiscent capsules at maturity, the method comprising: introducing into at least one cell or part of a sesame plant characterized by dehiscent capsules a genetic element comprising a QTL comprising a segment of linkage group (LG)-8 spanning from position 5,162,9to 7,447,238, wherein the QTL is present in the genome of a Sesamum indicum S-plant, seeds of which have been deposited with NCIMB Ltd. as the International Depositary Authority under Accession No. NCIMB 43877, wherein said QTL comprises the nucleic acid sequence set forth in SEQ ID NO:1, thereby producing a sesame plant characterized by closed capsules at maturity and by seeds having elevated content of zinc, iron, and calcium compared to seeds of a corresponding sesame crop plant lacking the QTL.
4. The method of claim 3, wherein the genetic element is introduced by introgression.
5. A plant produced by the method of claim 3, wherein said plant comprises the QTL. Webb + Co. Patent Attorneys
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US11445692B2 (en) | 2017-05-15 | 2022-09-20 | Equi-Nom Ltd. | Quantitative trait loci (QTL) associated with shatter resistant capsules in sesame and uses thereof |
US20210400901A1 (en) * | 2018-11-02 | 2021-12-30 | Sabra Dipping Company, LLC | Sesame plants with improved organoleptic properties and methods thereof |
US20210307285A1 (en) * | 2020-04-03 | 2021-10-07 | Sabra Dipping Company, LLC | Sesame plants with improved organoleptic properties and methods thereof |
US11730133B2 (en) | 2020-10-21 | 2023-08-22 | Equi-Nom Ltd | High yield sesame |
US11395470B1 (en) | 2021-09-14 | 2022-07-26 | Equi-Nom Ltd. | Sesame with high oil content and/or high yield |
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WO2000013488A1 (en) * | 1998-09-10 | 2000-03-16 | Sesaco Corporation | Method for making non-dehiscent sesame |
US20030208798A1 (en) * | 2002-04-30 | 2003-11-06 | Langham Derald Ray | Non-dehiscent sesame variety S25 |
US20090222940A1 (en) * | 2008-03-03 | 2009-09-03 | Derald Ray Langham | Non-dehiscent sesame |
US20110072533A1 (en) * | 2009-09-23 | 2011-03-24 | Sesaco Corporation | Non-dehiscent black-seeded sesame variety sesaco 55 |
US20110271360A1 (en) * | 2010-04-28 | 2011-11-03 | Sesaco Corporation | Non-dehiscent pygmy sesame variety sesaco 70 |
US20150264879A1 (en) * | 2014-03-18 | 2015-09-24 | Sesaco Corporation | Non-dehiscent sesame ind variety sesaco 37 |
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US8664472B2 (en) | 2010-04-28 | 2014-03-04 | Sesaco Corporation | Pygmy sesame plants for mechanical harvesting |
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- 2016-12-15 AU AU2016371462A patent/AU2016371462A1/en not_active Abandoned
- 2016-12-15 EP EP16828988.2A patent/EP3389364A1/en not_active Withdrawn
- 2016-12-15 WO PCT/IL2016/051337 patent/WO2017103928A1/en active Application Filing
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WO2000013488A1 (en) * | 1998-09-10 | 2000-03-16 | Sesaco Corporation | Method for making non-dehiscent sesame |
US20030208798A1 (en) * | 2002-04-30 | 2003-11-06 | Langham Derald Ray | Non-dehiscent sesame variety S25 |
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WO2017103928A1 (en) | 2017-06-22 |
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IL259853A (en) | 2018-07-31 |
EP3389364A1 (en) | 2018-10-24 |
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