CN102090315A - Method for producing hybrid rice seeds Chuanxiangzhan - Google Patents

Abstract

The invention belongs to the field of heterosis utilization, and particularly discloses a method for producing hybrid rice seeds Chuanxiangzhan. The hybrid rice seeds Chuanxiangzhan are new three-line early rice compositions produced by hybridizing a cytoplasmic male sterile line Chuanxiang 29A and a restorer line Huazhan, wherein the female parent Chuanxiang 29A is a high-quality and pyricularia oryzae-resistant aromatic indica sterile line commonly bred by the crop research institute of Sichuan academy of agricultural sciences and Sichuan Huafeng seed industry Co., Ltd., and has good flowering habit and high outcrossing rate; and the male parent restorer line Huazhan is an inbred line. The hybrid seeds have the characteristics of high yield, stable production, high disease resistance and high biological yield.

Description

The production method that hybrid rice seed river perfume (or spice) accounts for

Technical field

The present invention relates to the production method that hybrid rice seed river perfume (or spice) accounts for, is to utilize three line method to produce the method for the new combination of hybrid rice.

Background technology

China is paddy rice big country, and rice breeding technology maintains the leading position in the world always.But because the growth of Chinese population, the food problem that reply increases population remains the problem that China's agricultural needs most solution.Though it is hybrid rice seed production that the cost of three lines paddy seed is higher than two, because two be the production of hybrid seeds, have a big risk, be subjected to the uncontrollability of weather effect.Plant industry company in order to reduce the risk of production, produce hybrid rice seed, be still the maximum method of present kind industry company's employing with three line method.The shortening of the alternative time limit of kind at present reaches in order to enlarge with planting the needs that industry company competes abroad, and the three lines paddy crossbreed of seed selection safety is a most important task in present China rice breeding circle.

Summary of the invention:

The objective of the invention is to utilize the hybrid vigour theory, select high-combining ability, economical character is good, genotype is isozygotied, parents' affiliation is far away hybridization between selfed lines for use, produce high yield, disease-resistant hybrid rice seed.

The invention provides the production method that hybrid rice seed river perfume (or spice) accounts for, comprise the use inbred line, safety is isolated, and regulates date of seeding, suitable row ratio, and roguing, results in good time utilize three to be the fragrant 29A in male sterile line river and recovery is that China accounts for production hybrid rice kind river perfume (or spice) and accounts for.

Wherein said three is that the fragrant 29A in male sterile line river draws from academy of agricultural sciences, Sichuan paddy rice institute.

Wherein said recovery is that China accounts for, and draws from China Paddy Rice Inst, is being basic material from Malay SC02-S6, the recovery system that forms through test cross and systematic breeding repeatedly.

The fragrant 29A in the biomaterial river that the present invention relates to, China account for, SC02-S6 is all open in non-patent literature.

The fragrant 29A in river is litre in the fifth phase on the 1st September calendar year 2001 Ministry of Agriculture's new variety of plant protection bulletin.

Its China accounts for, SC02-S6 is open in the fourth phase on the 1st July in 2008 Ministry of Agriculture's new variety of plant protection bulletin.

Advantage of the present invention and good effect are:

This combination output height, the plant and leaf shape attitude is good, the tight Shu Shizhong of strain shape, sword-like leave is more roomy, and tillering ability is strong, and many of fringes are big, and fringe shape is medium, the ripening rate height, thousand kernel weight is bigger, and ripe phase annesl is good, and comprehensive resistance is good.About 128 days of the time of infertility, plant height 121cm, spike length 28.3cm, several 195 of every total grain panicle, ripening rate 81.2%, the about 28g of thousand kernel weight, plant type is loose moderate, well developed root system, the later stage discolors, middle blast resisting, rice is of fine quality.

Embodiment

Following examples are used to illustrate the present invention, but are not used for limiting the scope of the invention.

Embodiment 1: the concrete production process that crossbreed of the present invention river perfume (or spice) accounts for

It is to be that China accounts for to hybridize and produces by the fragrant 29A in river and recovery that river perfume (or spice) accounts for.

The high-quality three that the fragrant 29A in river draws from the seed selection of academy of agricultural sciences, Sichuan paddy rice institute is a male sterile line.

Recovery is that China accounts for, and draws from China Paddy Rice Inst, is being basic material from Malay SC02-S6, the recovery system that forms through test cross and systematic breeding repeatedly.

Embodiment 2: the production technology that crossbreed of the present invention river perfume (or spice) accounts for

(1) safety is isolated: space length＞500 meter, or other rice varieties of heading flowering period of being separated by more than 15 days carries out the production of hybrid seeds and isolates.

(2) begin sowing in good time: first phase male parent is than maternal Zao inserting 25～30 days, or leaf order difference 6.5-7.5 leaf, or the effective accumulated temperature father and mother originally differ from, and (area is maternal in the Soviet Union sows 20-25 day in May about 205 ℃, sowing about the April 24 male parent first phase), the second phase, the third phase are separated by about 7 days with preceding first phase respectively, or are separated by 12 days with two phase male parents.

(3) rational close planting, suitable row ratio: 16.7 * 10 centimetres of seeding row spacing female parents, plant foot 15～180,000 basic seedlings for every mu, the male parent spacing in the rows is 16.7 centimetres, and the aisle was 33.3 centimetres when duplicate rows was planted, and father and mother's one's own profession ratio is 2: 20 or 1: 12.Row is to vertical with locality predominant wind at heading stage.

(4) use " 920 " technology and artificial supplementary pollination; Spray 920 during 10% female parent heading, every a spray 20 grams, the 4th spray 5 grams.Catch up with pollen to carry out artificial supplementary pollination whole flowering stage every day at florescence from fringe phase beginning to neat fringe.

(5) prevent and treat the kernel smut technology: black spirit (producer's medicine) prevents and treats kernel smut 2-3 time continuously at cut phase, fringe phase beginning and full heading time with going out.

(6) roguing technology: whole growing is pulled out the high temperature sensitive variant of removing the loose powder phenomenon among this outside proterties such as variant of form, fertility and father and mother and the fragrant 29A in maternal river, contains spend back about 23 days timely results hybrid seed.

Embodiment 3: river perfume (or spice) accounts for the cultivation application technology of crossbreed

1, begins sowing in good time, cultivate strong seedling.Semilate rice sowing, 18～22 days length of time rice seedlings grow are done by Anhui, the big portion in Henan.

2, rational close planting.13 centimetres of transplanting specification 23 (or 26) cm x, 2 paddy seedlings of every root and stem of certain plants or mu are thrown 1.8～2.2 ten thousand root and stem of certain plants.

3, rich water quality management: N, P, the fertile compounding application of K use sufficient base manure, early execute fetilizer for tillering, and the later stage is seen the seedling fertilising; Shallow water is turned green, thin moisture tiller, and enough seedling dry fields, fringe phase water conservation, the later stage alternation of wetting and drying is avoided and is cut off the water supply too early to ripe.

4, prevention and elimination of disease and pests in time.

Claims (7)

1. the production method that accounts for of hybrid rice seed river perfume (or spice).Comprise that the sowing father and mother originally, spray gibberellin maternal plant heading stage, it is characterized in that: with three is that fragrant 29A in male sterile line river and recovery are that China accounts for hybridization production three lines paddy crossbreed.The fragrant 29A in maternal river draws from academy of agricultural sciences, Sichuan paddy rice institute, is that high yield, high-quality, high anti-three are male sterile line; It is that Hua Zhanwei draws outward and is that male parent is recovered.

2. method according to claim 1 is characterized in that safe isolation distance＞500 meter, or is separated by with this heading flowering period of described father and mother and carries out the production of hybrid seeds more than 15 days and isolate.

3. method according to claim 1, it is characterized in that first phase male parent than maternal Zao inserting 25～30 days, or leaf order difference 6.5-7.0 leaf, or the effective accumulated temperature father and mother originally differ from 200 ℃, the second phase, the third phase were separated by 7 days with preceding first phase respectively, or were separated by 10 days with two phase male parents.

4. method according to claim 1 is characterized in that 16.7 * 10 centimetres of seeding row spacing female parents, and the male parent spacing in the rows is 16.7 centimetres, and the aisle was 33.3 centimetres when duplicate rows was planted, and father and mother's one's own profession ratio is 2: 20 or 1: 12.

5. method according to claim 1 is characterized in that 10% of maternal total spike number sprays gibberellin 920 when earing, every a spray 20 grams, spray in the 4th day 5 grams.

6. method according to claim 1 and 2 is characterized in that preventing and treating kernel smut 2-3 time continuously at cut phase, fringe phase beginning and full heading time.

7. method according to claim 1 is characterized in that whole growing pulls out the discrepant plant of the fragrant 29A in outside proterties and maternal river, contains and spends back 25 days results hybrid seeds.