CN101622958A

CN101622958A - Method for breeding fragrant glutinous rice paddy seed

Info

Publication number: CN101622958A
Application number: CN200810022732A
Authority: CN
Inventors: 吴和生; 罗治华; 丁同华; 吴晓卫
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-07-10
Filing date: 2008-07-10
Publication date: 2010-01-13
Anticipated expiration: 2028-07-10
Also published as: CN101622958B

Abstract

The invention discloses a method for breeding a fragrant glutinous rice paddy seed, which comprises the following: a first step, selecting and using a glutinous rice or non-glutinous rice photo-thermo-sensitive sterile system containing fragrance genes as a female parent, using glutinous rice or non-glutinous rice containing the fragrance genes as a male parent, and hybridizing the female parent and the male parent; a second step, determining the seeding time of the male parent and the male parent according to a period from seeding to heading of the male parent and the male parent; a third step, breeding seedlings in a large shed by adopting a plastic film, covering the plastic film on the seedlings, transplanting the seedlings with two leaves and one core to a seedling field, and then covering the seedlings by small shed plastic to increase the temperature; a fourth step, spraying gibberellin to the seedlings to improve the hybrid product rate, and determining the using amount of the gibberellin according to the sensitivity of the female parent on the gibberellin when the female parent is headed to be between 15 and 25 percent, generally using 1 to 50 g/667m<2> of pure gibberellin product in each Mu; and a fifth step, when the fructification female parent is totally mature, harvesting hybridized seeds. The method not only has good quality, but also can realize large-scale production of fragrant glutinous rice.

Description

A kind of breeding method of fragrant glutinous rice paddy seed

Technical field

The present invention relates to a kind of breeding method of rice varieties newtype.

Background technology

The existing oily non-glutinous rice paddy grain of rice of China is tiny, and it is fragrant soft to cook, and oiliness is stronger, but output is very low.The many glutinous rice with round-grained rice (Xian) rice blending 15-20% of the glutinous rice of supplying on the market satisfy the demands of consumers, but because glutinous rice yields poorly, the price height, enterprise's production cost are bigger.Therefore, glutinous rice rareness on the market, price is higher, can not satisfy consumers in general's needs; People wish to obtain a kind ofly to cook that to have outward appearance glossy, mouthfeel perfume (or spice), soft, sticking and oiliness rice.

Summary of the invention

Technical problem to be solved by this invention is, a kind of breeding method of fragrant glutinous rice paddy seed is provided, and it is not only best in quality, and can realize the large-scale production of fragrant sticking paddy rice.

The breeding method of fragrant glutinous rice paddy seed of the present invention is: the first step selects for use the japonica rice or the long-grained nonglutinous rice photo-thermo-sensitive genic male sterile line that contain scent gene to do female parent, does male parent with the round-grained rice glutinous rice or the Xian glutinous rice that contain scent gene, carries out hybrid seed production; Second step was determined sowing time, went through the phase according to this sowing of father and mother to heading and determined this sowing time of father and mother, to guarantee this heading synchronously of father and mother; The 3rd step was adopted seedling in the plastic film shed, covered with plastic film again above the rice shoot; One heart stage of rice shoot two leaves, is transplanted to and posts the rice seedling bed, adds to cover with the hut plastics to heat again; Sooner or later shorten the duration of day with the black plastic film shading; Promote male parent heading ahead of time, in the safety production of hybrid seeds phase, ear simultaneously with female parent to reach male parent; The 4th step sprayed gibberellin, improved outcrossing seed-setting rate, as female parent heading 15-20%, according to female parent the susceptibility of gibberellin was determined consumption, general every mu with the pure product 1-50 of gibberellin gram/667m ²The 5th step is during solid maternal complete ripeness, the results hybrid seed.

When hybrid seed is used for land for growing field crops production, the proterties of the paired gene of fragrance is preserved, and the recessive glutinous trait gene of decision endosperm proterties separates with dominant gene, produces two types gamete, a kind of is the gamete of recessive glutinous trait gene, and a kind of is the gamete of the non-glutinous trait gene of dominance; Gamete produces the homozygous individual of 1/4 band recessive gene when independent assortment, 2/4 band shows, the heterozygous individual of recessive gene, 1/4 band dominant gene homozygous individual; Because dominant gene has the covering effect to the trait expression of recessive gene, the rice 1/4 that final production is come out is the individuality that contains recessive character, and 3/4 is the individuality of dominant character; Promptly obtain field growing proterties unanimity, the rice that paddy processes contains 25% glutinous rice, and 75% is the newtype of round-grained rice (Xian) rice.

The outstanding advantage of the fragrant glutinous rice paddy seed that the present invention cultivates exists: the one, adopt the hybridization means rice scent gene, endosperm character gene with the conventional rice good quality and high output assortment of genes be in the same place, innovate the application of glutinous rice germ plasm resource, createed the newtype of rice; The 2nd, overcome the weakness that glutinous rice paddy yields poorly, price is high, create fragrant sticking paddy rice good quality and high output new varieties; The 3rd, the method for employing hybrid seeding, the large-scale production fragrant glutinous rice paddy seed satisfies the requirement of planting of new varieties field growing proterties uniformity and large tracts of land Rice Production.

Embodiment

Embodiment 1

The first step selects father and mother originally.Select for use japonica rice (or long-grained nonglutinous rice) the photo-thermo-sensitive genic male sterile line Y4S that contains scent gene to do female parent, with the fragrant glutinous male parent of doing in round-grained rice glutinous rice (or Xian glutinous rice) Guanling of containing scent gene.

Second step was determined sowing time.Determine this sowing time of father and mother according to father and mother's this breeding time of length.To guarantee this heading synchronously of father and mother.

The 3rd step whole heading stage.Adopt seedling in the plastic film shed, covered with plastic film again above the rice shoot; One heart stage of rice shoot two leaves, is transplanted to and posts the rice seedling bed, adds to cover with the hut plastics to heat again; Sooner or later shorten the duration of day with the black plastic film shading; Promote male parent heading ahead of time, in the safety production of hybrid seeds phase, ear simultaneously with female parent to reach male parent.

The 4th step sprayed gibberellin, improved outcrossing seed-setting rate.As female parent heading 15-20%, according to female parent the susceptibility of gibberellin is determined consumption, general every mu with the pure product 1-50 of gibberellin gram/667m ²

The 5th step was collected hybrid seed.When solid maternal complete ripeness, the results hybrid seed.

Embodiment 2

The first step selects father and mother originally.Round-grained rice with fragrant gene glutinous (or Xian glutinous rice) rice male sterile line 117S does female parent, does male parent with the military fortune of round-grained rice (or long-grained nonglutinous rice) in the good quality and high output routine of fragrant gene round-grained rice 21.

Claims

1, a kind of breeding method of fragrant glutinous rice paddy seed is characterized in that: the first step selects for use the japonica rice or the long-grained nonglutinous rice photo-thermo-sensitive genic male sterile line that contain scent gene to do female parent, does male parent with the round-grained rice glutinous rice or the Xian glutinous rice that contain scent gene, carries out hybrid seed production; Second step was determined sowing time, went through the phase according to this sowing of father and mother to heading and determined this sowing time of father and mother, to guarantee this heading synchronously of father and mother; The 3rd step was adopted seedling in the plastic film shed, covered with plastic film again above the rice shoot; One heart stage of rice shoot two leaves, is transplanted to and posts the rice seedling bed, adds to cover with the hut plastics to heat again; Sooner or later shorten the duration of day with the black plastic film shading; Promote male parent heading ahead of time, in the safety production of hybrid seeds phase, ear simultaneously with female parent to reach male parent; The 4th step sprayed gibberellin, improved outcrossing seed-setting rate, as female parent heading 15-20%, according to female parent the susceptibility of gibberellin was determined consumption, general every mu with the pure product 1-50 of gibberellin gram/667m ²The 5th step is during solid maternal complete ripeness, the results hybrid seed.

2, the breeding method of fragrant glutinous rice paddy seed according to claim 1, it is characterized in that: select for use the round-grained rice glutinous rice of fragrant gene or Xian glutinous rice photo-thermo-sensitive genic male sterile line to do female parent, good quality and high output conventional japonica rice or long-grained nonglutinous rice with fragrant gene are done male parent, produce hybrid seed.