CN107926697A - A kind of round-grained rice two is temperature and light sensitive nuclear sterility system screening technique, system and sterile line - Google Patents
A kind of round-grained rice two is temperature and light sensitive nuclear sterility system screening technique, system and sterile line Download PDFInfo
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- CN107926697A CN107926697A CN201711395409.8A CN201711395409A CN107926697A CN 107926697 A CN107926697 A CN 107926697A CN 201711395409 A CN201711395409 A CN 201711395409A CN 107926697 A CN107926697 A CN 107926697A
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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
- A01H1/02—Methods or apparatus for hybridisation; Artificial pollination ; Fertility
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Abstract
The invention belongs to breeding technology field, it is temperature and light sensitive nuclear sterility system screening technique, system and sterile line to disclose a kind of round-grained rice two, carries out selection hybridization plus system choosing is combined with disease resistance for compounding, the choosing of target garden, first stage selection, second stage selection, phase III selection, preferable strain.The present invention is combined using genetic breeding with Biology Breeding successfully invents round-grained rice Xian two-line sterile lines by round-grained rice, long-grained nonglutinous rice gene polyadenylation signal hybrid technology, by the fringe of round-grained rice Xian two-line sterile lines, bag neck degree does not reach 100% and neck is extended in 100%5cm or so naturally, neck neck is not easily broken during production of hybrid seeds bar powder, it is not required to beat any hormone to aid in, solving puzzlement, all sterile lines seed makings in this field need to spray hormones (Activol) to aid in solving fringe bag neck science and technology problem both at home and abroad.
Description
Technical field
The invention belongs to breeding technology field, more particularly to a kind of round-grained rice two be temperature and light sensitive nuclear sterility system screening technique,
System and sterile line.
Background technology
Current two-line sterile lines all in the world must all use substantial amounts of hormone drug because of fringe bag neck in large-area applications
Agent come aid in its by be wrapped in trousers it is pretty in fringe be completely drawn out, production of hybrid seeds production is all directly affected to the dosage size of medicament in the process
Amount and seed quality, are the technological difficulties that a production of hybrid seeds family is difficult control, increase very big financial burden to peasant and enterprise.
Rice belongs to grass family Oryza, is a kind of extremely ancient crop, China's artificial growth history at least 7000,
Domestication under long-term evolution and different ecological condition and initiative, which issue, estranged turns to long-grained nonglutinous rice, two big subspecies of japonica rice.I
State's technique for breeding of hybridized rice is advanced in the world, and the sterile line of hybridized rice applied in the world at present is divided into CMS line and two systems
Two major class of sterile line；CMS line is divided into Xian CMS lines and round-grained rice CMS line, and two-line sterile line is divided into two systems of Xian not
Educate and be and round-grained rice two-line sterile line；Existing two major classes sterile line all there are fringe bag neck technical barrier, and bag neck degree all 40% with
On, some sterile line fringe bag neck degree are up to more than 60%, and Activol mu dosage is far longer than 24g high actually in the large area production of hybrid seeds
Mu dosage reach more than 30g.Technique for breeding of hybridized rice China advanced in the world has stepped on why journey perplexs breeding circle in more than 40 years
Fringe bag neck problem cannot solveReason is that breeding method for creating is stood in line with direction, material and initiative follow the wind away, technology is not mutual
Profit causes sterile line fringe bag neck not solve at first without big strategic structural.
In the prior art, fringe is developed not bag neck sterile line early in the mid-80 China breeder, but due to
Itself initiative solid 30% fringe neck of ability of fringe when technically many drawbacks, (long more than the 13cm of discharge neck neck) cause practical application
Fracture and cause total crop failure not use；Only slightly change only solves the problems, such as percentage to existing sterile line on bag neck degree；Mesh
Although preceding sterile line breeding is above taken heredity to be combined with molecular breeding but can be bred as in key technology in innovative technology application
In the practical fringe of one, bag neck sterile line still can not crack for perfect adaptation.
The shortcomings that prior art：
Current existing sterile line fringe bag neck degree need to spray substantial amounts of hormone drug in the production of hybrid seeds all in more than 40%-60%
Agent Activol, dosage is excessive to be caused grain husk flower not close grain husk and make hybrid seed yield too low to cause very big economy to seeding farmer and enterprise
Save and lose, while add seed costs and increase planting cost to kind of a grain farmer family, be unfavorable for superior rice socio-intangible asset sustainable development,
Farmers' income is reduced, and is unfavorable for continuing to increase for farmers' income, while also results in air ambient pollution.
Existing sterile line such as prevent trousers pretty with hormone dose dot in fringe from being fully drawn out, clever flower is not inseminated, this
Sample causes that crop field hybrid seed yield is low, the increase of seed production purity risk, more unfavorable increasing peasant income reducing enterprise cost.
Existing sterile line such as Activol dosage is slightly larger to kill glume, kind of paddy color and luster browning or grain husk of grinning is caused seed quality
The province such as unqualified is lost.
In conclusion problem existing in the prior art is：
All there is fringe bag neck under natural suitable condition in rice sterile line in the world at present, and bag neck degree is up to 40%-60%
More than, it is necessary to repeatedly regulated and controled using hormone agents (Activol), go out fringe whole Shen of the bag in pretty leaf and awarded easy to open grain husk
Essence, while various technical risks are also brought along, dosage is crossed conference and is caused：Glume does not close grain husk, maternal neck neck fractures, husk is brown etc.
Unfavorable, dosage is small or the uneven fringe bag neck of spray cannot go out pretty completely, makes the insemination that can not bloom of clever flower cause hybrid seed yield low, this
Sample risk in hybrid seed production is big, causes the atmosphere pollution of production of hybrid seeds area, breeding cost height, seed appearance luster difference etc., is made to production of hybrid seeds family and enterprise
Into great financial burden.After long-grained nonglutinous rice and japonica rice hybridization, offspring's stability is poor, and the selection and breeding of the sterile line just solve above hardly possible
Topic.
The content of the invention
In view of the problems of the existing technology, the present invention provides a kind of round-grained rice two be temperature and light sensitive nuclear sterility system screening technique,
System and sterile line.
The present invention is achieved in that a kind of round-grained rice two is temperature and light sensitive nuclear sterility system screening technique, and two system's temperature of round-grained rice is photosensitive
The characteristics of line with genic sterile screening technique is exposed using Restoring Line of Japonica Rice fringe neck, and the stretching sword-like leave of neck neck is longer is hybridized and is returned
Hand over, the exposed gene of Restoring Line of Japonica Rice fringe neck is imported, so as to select the single plant of the naturally exposed 5cm of fringe neck.
Further, the round-grained rice two is that temperature and light sensitive nuclear sterility system screening technique includes：
Generation is added to compound：Dai Bingyong bis- is added to match somebody with somebody hybridization with first familiar generation seed strange land by one, then it is extensive with F1 generation seed and japonica rice
Multiple system's backcrossing, florescence combo for composite import mixed base because of the selection target strain in offspring's segregating population；
Select in target garden：Shuttle according to hereditary seed choosing method north and south and add Dai Puxuan, length and the outstanding single plant of indoor selection and breeding in field
System；
First stage selects：Round-grained rice two-line sterile line proceeds by target by passing through continuous hybrid and backcrossing in forth generation
The Disease Resistance Identification of single plant, selects the strong target single plant of disease resistance；
Second stage selects：Continue north and south shuttle plus generation, early blossoming, round shaped grain are selected in garden, abortion is thorough, stigma appearing is good, big list
Strain；It is the 8th generation selection economical character stable, leaf color leaf sheath green, blade short wide, upright, slightly volume, stable fertility, paddy in garden
The round, big panicle many grains per panicle of grain, through the thorough abortion of microscopy, flowering time is early, disease resistance is strong, 19 single plants of the naturally exposed 5cm of fringe neck；
Stubble is cut, rice stub single plant bagging sowing is stayed in plant division；
Phase III selects：Continue plantation plus for 19 strains of round-grained rice two-line sterile line, then carry out the choosing perfection of separation of group system
With reference to round-grained rice two-line sterile line.
Further, it is described to add for progress selection hybridization is needed before compounding, select parents' material to carry out sexual hybridization combo.
Further, need to carry out after phase III selection：
Preferable strain is combined system choosing with disease resistance：Select round-grained rice two-line sterile line single plant system for：Strain is compact, economical character is steady
Fixed, the short width of leaf color leaf sheath green, blade, upright, slightly volume, grain is round, big panicle many grains per panicle, stable fertility, and microscopy abortion is thorough, anti-
The single plant system that characteristic of disease is strong, flowering habit is good, Hua Shizao, the naturally exposed 5cm of fringe neck or so, quality are excellent.
It is temperature and light sensitive nuclear sterility system screening system another object of the present invention is to provide a kind of round-grained rice two.
It is fringe not bag neck sterile line another object of the present invention is to provide a kind of round-grained rice Xian wide affine two.
Advantages of the present invention and good effect are：The selection and breeding of the sterile line solve, during the production of hybrid seeds, it is not necessary to use medicine
Agent, saves medicament 20-60g (different cultivars dosing not sample), per acre cost-effective 50-150 members per acre, reduce the production of hybrid seeds into
This, ensure that the hybrid seed yield and seed quality at production of hybrid seeds family；(medicament uses excessive, reduction seed commodity and percentage of seedgermination.
The present invention solve in the world round-grained rice Xian two-line sterile lines (female parent) under the conditions of natural adaptation fringe not bag neck neck neck from
Right exposed 5cm or so is the core technology of the present inventor's invention.
The present invention is combined using genetic breeding with Biology Breeding successfully invents round-grained rice by round-grained rice, long-grained nonglutinous rice gene polyadenylation signal hybrid technology
The prosperous JD91S of Xian two-line sterile lines friend, by the fringe of the prosperous JD91S of round-grained rice Xian two-line sterile lines friend, bag neck degree does not reach 100% and neck
Naturally elongation neck neck in 100%5cm or so, production of hybrid seeds bar powder is not easily broken, and is not required to dozen any hormone to aid in, solves puzzlement
All sterile lines seed makings in this field need to spray hormones (Activol) to aid in solving fringe bag neck science skill both at home and abroad
Art problem.
The present invention successfully solves rice sterile line (female parent) because fringe bag neck needs high-tech auxiliary using hormone agents
Helping heading to draw neck to cause, seed production quality is poor, low output causes great economy to save mistake and risk problem to seeding farmer and enterprise.
The present invention has established scientific and technical support for China's rice breeding technology advanced in the world, at the same for seeding farmer and
Enterprise subtracts risk, it is ensured that environmentally protective and seeding farmer has laid solid foundation with enterprise's cost-saving synergistic.
The present invention, which has been truly realized, to win glory for the motherland, is provided for reducing enterprise cost, for increasing peasant income, social environment green harmony
Reliable high-tech support.
Successfully by the prosperous JD91S of friend, bag neck degree does not reach 100% to fringe to the present invention under field conditions (factors), is conducive to outcrossing
Improve seed purity and hybrid seed yield, reduce breeding cost and risk, increase peasant and enterprise's income, social environment green and
Humorous, more favourable a large amount of combo applications, select more outstanding kinds, domestic, the international green rice cause of service.The sterile line
Selection and breeding solve, during the production of hybrid seeds, it is not necessary to using medicament, reduce breeding cost, ensure that production of hybrid seeds family hybrid seed yield and
Seed quality.
Brief description of the drawings
Fig. 1 is that round-grained rice two provided in an embodiment of the present invention is temperature and light sensitive nuclear sterility system screening technique flow chart.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
The current hybrid rice in China plants long-term sowing quantity at 4.2 hundred million jin, is calculated by hybrid seed yield per mu at 300 jin, often
Year need to be not less than 1,400,000 mu of production of hybrid seeds areas, need hormone agents 24g by the mu production of hybrid seeds to adjust fringe bag neck problem, at least need to swash throughout the year
Plain 1,400,000 mu/24g=3360 of medicament, ten thousand g.The rice production of hybrid seeds solves the problems, such as fringe bag neck gibberellin multi-purpose greatly namely in the world at present
The Activol hormone agents often said, about 3 yuan every gram of wholesale market price, is not less than 1.1 hundred million yuans with Activol cost throughout the year,
Along with spray labour cost at least needs 37,000,000 yuan of working hour expense by 2 each 13 yuan of mu working hour expenses, this is not included because of formulation rate also not
A large amount of economy save risk (annual China's rice production of hybrid seeds is obvious to all because Activol improper use causes damages) of becoming estranged caused by,
Also result in the air pollution of production of hybrid seeds area at the same time.Fringe not bag neck sterile line and neck neck spitting unit is appropriate is formulated out in invention, is to realize China
The great-leap-forward revolution again of hybrid rice breeding, will also realize that rice breeding moves towards environmentally protective, cost-saving synergistic scientific and technological revolution,
New contribution is made to ensure the grain security of China and solving modern new agricultural problem, is to reach agricultural supply side structure comprehensively
Property reform environmentally protective target.
Said from technological layer, utilizing " Xian and round-grained rice bridge construction ", compound to repair auxiliary technology again to be bred as round-grained rice Xian wide affine two be fringe with its again
Not bag neck sterile line, having the advantages that stable fertility, Hua Shizao, wide affine, superior quality advantage, it can be complete by a few person's application technologies
U.S.A is incorporated into one, has extensive actual application value, and solves production of hybrid seeds peasant's abridged edition and increase income reducing enterprise cost, social environment
It is environmentally protective that valuable technical support is provided.
How to be educated first using the outstanding gene of both existing two major classes sterile line present situation and two big subspecies material Xian, round-grained rice
Kind method for creating, material, technological innovation will have important breakthrough, largely screen existing wide compatible CMS line and carry out several years initiative choosing
It is fixed, find the mutually affine extensive pairing material of round-grained rice and carried by way of number and compound repair auxiliary technology incubation round-grained rice Xian again with its again through " Xian and round-grained rice bridge construction "
Wide affine two be fringe not bag neck sterile line, and neck stem is sturdy, discharge neck length is no more than 6cm, and it is leading to be that the present inventor is formulated
Technology.
The application principle of the present invention is described in detail below in conjunction with the accompanying drawings.
Round-grained rice two provided in an embodiment of the present invention is temperature and light sensitive nuclear sterility system screening technique, utilizes the round-grained rice obtained in the prior art
The characteristics of rice restorer fringe neck is exposed, and the stretching sword-like leave of neck neck is longer is hybridized and is returned, and imports the Restoring Line of Japonica Rice fringe neck
Exposed gene, so as to select the single plant of the naturally exposed 5cm of fringe neck.
Round-grained rice two provided in an embodiment of the present invention is temperature and light sensitive nuclear sterility system screening technique, or using it is following into experiment obtain
It is the screening of temperature and light sensitive nuclear sterility system that Restoring Line of Japonica Rice, which carries out round-grained rice two,；It is specific as follows：
As shown in Figure 1, round-grained rice two provided in an embodiment of the present invention is temperature and light sensitive nuclear sterility system screening technique, including：
S101：Selection hybridizes：Targetedly choose parents' material and carry out hybridization combo, breeding clicks in Anhui within 2007
Select the prosperous 8S in another name for Sichuan Province of our company's selection and breeding and carry out sexual hybridization with the prosperous round-grained rice 326 of Restoring Line of Japonica Rice (length in fringe neck portion) of company's selection and breeding.
S102：Generation is added to compound：Add Dai Bingyong bis- with hybridization with first familiar generation seed (the prosperous round-grained rice 326 of the prosperous 8S/ in another name for Sichuan Province) strange land by one
Prosperous round-grained rice 221 (fringe neck is short), then be returned with (the prosperous round-grained rice 326/ of the prosperous 8S/ in another name for Sichuan Province/prosperous round-grained rice 221) F1 generation seed with prosperous round-grained rice 326, the florescence is answered
Close combo and import mixed base because so as to carry out selection target strain in offspring's segregating population.
S103：Select in target garden：Shuttle according to hereditary seed choosing method north and south and add Dai Puxuan, targetedly field is careful for a long time
Research often for it is selected determine Strain specificity, stability carry out at the same time indoor technology for detection confirmation selection and breeding (abortion, grain type, Hua Shi,
Naturally exposed 5cm of fertility stability, fringe neck or so) outstanding single plant system.
S104：First stage selects：Round-grained rice two-line sterile line is by passing through continuous hybrid and backcrossing, its selected two system of round-grained rice is not
Educate the feature for being and substantially conform to technical requirements, thus start with country of Anhui Jinzhai County Disease Resistance Identification point in forth generation and carry out
The Disease Resistance Identification of target single plant, selects disease resistance strong.
S105：Second stage selects：Continue north and south shuttle plus generation, garden select early blossoming, round shaped grain, abortion thoroughly, stigma appearing compared with
Good, larger single plant system；Be in garden the 8th generation selection economical character stable, leaf color leaf sheath green, blade it is short it is wide, upright, slightly roll up, educate
Property stablize, grain is round, big panicle many grains per panicle, through the thorough abortion of microscopy, and flowering time is early, and disease resistance is strong, and the naturally exposed 5cm of fringe neck is left
19 right single plants, cut stubble, rice stub single plant bagging sowing is stayed in plant division.
S106：Phase III selects：Continue plantation plus for 19 strains of round-grained rice two-line sterile line, so as to carry out separation of group again
System selects the round-grained rice two-line sterile line of perfect adaptation.
S107：Preferable strain is combined system choosing with disease resistance：Select round-grained rice two-line sterile line single plant system for：Strain is compact, agronomy
Character is stablized, and the short width of leaf color leaf sheath green, blade, upright, slightly volume, grain is round, big panicle many grains per panicle, stable fertility, microscopy abortion
Thoroughly, the single plant system that disease resistance is strong, flowering habit is good, Hua Shizao, the naturally exposed 5cm of fringe neck or so, quality are excellent, name for：Friend
Prosperous JD91S.
Its Zhongyou is prosperous：Represent unit abbreviation；JD：It is to represent first capitalization of japonica rice class English alphabet；91：Represent the 91st plant
System；S：Represent the abbreviation of industry two-line sterile line.
In the prosperous round-grained rice 326 of the prosperous 8S/ in another name for Sichuan Province of the present invention, other kinds Bao Guo Anhui Province experiment of prosperous round-grained rice series, but the series
Different cultivars parental source is different, prosperous round-grained rice 326, cultivar origin：The prosperous prosperous round-grained rice 26 of round-grained rice 413/, the prosperous 8S in another name for Sichuan Province pass through Anhui Province crops
Variety certification committee scene Fertility identification, there is assay certificate.
The application principle of the present invention is further described with reference to specific embodiment.
2007 are that " the prosperous 8S " in another name for Sichuan Province is sent out Anhui You Xin agricultural science and technologys Co., Ltd two-line sterile line to be maternal with the said firm
Bright Restoring Line of Japonica Rice " prosperous round-grained rice 326 " carries out hybridization combo, winter in the same year Hainan with (the prosperous round-grained rice 326 of the prosperous 8S/ in another name for Sichuan Province) F1 generation with it is prosperous
Round-grained rice 221 hybridizes, and the next spring is returned in the Anhui F1 generation of (the prosperous round-grained rice 326/ of the prosperous 8S/ in another name for Sichuan Province/prosperous round-grained rice 221) with prosperous round-grained rice 326, the same year
Shuttle hereditary Sexual behavior mode for Hainan, Anhui north and south, and selection tillering ability is strong, and plant type is compact, and plant strain growth is delicate and pretty, and disease resistance is strong, strain leaf
Form is good, and the short wide upright upper act of leaf color leaf sheath green, blade is slightly involute, grain is round, and big panicle many grains per panicle, flowering habit are more early, fringe
Naturally exposed 5cm of neck or so, through 18 generation heredity recurrent selections in 11 years in winter in 2016 Hainan by strain numbering be 9-1
Sterile line stable strain and multiple restorers to be measured affinity strong, and small area breeding, spring in 2017 Anhui name：Friend is prosperous
JD91S.Its process is as follows：
With reference to good effect, the invention will be further described.
Handed over again with short neck round-grained rice restorer wheel using long-neck restorer new acquaintance in Xian sterile lines and round-grained rice and formulate out wide affine application
Type round-grained rice Xian two is fringe not bag neck sterile line, fringe not bag neck length 100%5-6cm, and fringe not bag neck degree 100%, makes China hybrid rice
It is changed into environmental type large area production of hybrid seeds popularizing planting to take a firm foundation.
Present invention initiative does not spray any hormone regulator fringe under field conditions (factors), and bag neck sterile line does not realize production of hybrid seeds agriculture
Family is increased income with enterprise abridged edition, provides green for farmer, high yield and the high high-quality hybrid two of purity are kind, meet current country
Agriculture supply side agricultural structure adjustment policy (high yield, high-quality, efficient, green).
The present invention formulates out not to be sprayed the fringe of any hormone control such as Activol bag neck sterile line is not under field conditions (factors)
In order to greatly improve yield, environmentally protective, quality and the quality of production of hybrid seeds stabilization, production of hybrid seeds family, farmer, social ring are really realized
Border, the harmonious development of performance of enterprises quaternity.
The present invention formulate out do not spray the fringe of any hormone control not bag neck sterile line be solve the high fit rate of nature and
Outcrossing seed-setting rate, easy to the sterile line, foundation stone securely has been established in actual extensive use from now on.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement made within refreshing and principle etc., should all be included in the protection scope of the present invention.
Claims (6)
1. a kind of round-grained rice two is temperature and light sensitive nuclear sterility system screening technique, it is characterised in that the round-grained rice two is temperature and light sensitive nuclear sterility system sieve
The characteristics of choosing method is exposed using Restoring Line of Japonica Rice fringe neck, and the stretching sword-like leave of neck neck is longer is hybridized and is returned, and imports the round-grained rice
The exposed gene of rice restorer fringe neck, so as to select the single plant of the naturally exposed 5cm of fringe neck.
2. round-grained rice two as claimed in claim 1 is temperature and light sensitive nuclear sterility system screening technique, it is characterised in that the round-grained rice two is Wen Guang
Quick line with genic sterile screening technique includes：
Generation is added to compound：Add Dai Bingyong bis- with hybridization with first familiar generation seed strange land by one, then with F1 generation seed and Restoring Line of Japonica Rice
Backcrossing, florescence combo for composite import mixed base because of the selection target strain in offspring's segregating population；
Select in target garden：Shuttle according to hereditary seed choosing method north and south and add Dai Puxuan, length and the indoor outstanding single plant system of selection and breeding in field；
First stage selects：Round-grained rice two-line sterile line proceeds by target single plant by passing through continuous hybrid and backcrossing in forth generation
Disease Resistance Identification, select the strong target single plant of disease resistance；
Second stage selects：Continue north and south shuttle plus generation, early blossoming, round shaped grain are selected in garden, abortion is thorough, stigma appearing is good, big single plant system；
It is to select short wide, upright, slightly volume, stable fertility, the grain of stable economical character, leaf color leaf sheath green, blade to justify in the 8th generation in garden
Type, big panicle many grains per panicle, through the thorough abortion of microscopy, flowering time is early, disease resistance is strong, 19 single plants of the naturally exposed 5cm of fringe neck；Cut
Rice stub single plant bagging sowing is stayed in stubble, plant division；
Phase III selects：Continue plantation plus for 19 strains of round-grained rice two-line sterile line, then carry out separation of group system and select perfect adaptation
Round-grained rice Xian wide affine two be fringe not bag neck sterile line.
3. round-grained rice two as claimed in claim 1 is temperature and light sensitive nuclear sterility system screening technique, it is characterised in that it is described plus for compounding before
Selection hybridization need to be carried out, selects parents' material to carry out sexual hybridization combo.
4. round-grained rice two as claimed in claim 1 is temperature and light sensitive nuclear sterility system screening technique, it is characterised in that after phase III selection
Need to carry out：
Preferable strain is combined system choosing with disease resistance：Select round-grained rice two-line sterile line single plant system for：Strain is compact, economical character is stablized,
The short width of leaf color leaf sheath green, blade, upright, slightly volume, grain is round, big panicle many grains per panicle, stable fertility, and microscopy abortion is thorough, disease-resistant
The single plant system that property is strong, flowering habit is good, Hua Shizao, the naturally exposed 5cm of fringe neck or so, quality are excellent.
5. the round-grained rice two that a kind of round-grained rice two as claimed in claim 1 is temperature and light sensitive nuclear sterility system screening technique is temperature and light sensitive nuclear sterility system
Screening system.
6. the round-grained rice Xian wide affine two that a kind of round-grained rice two as claimed in claim 1 is the screening of temperature and light sensitive nuclear sterility system screening technique be fringe not
Bag neck sterile line.
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