CN103202216B - Production method for hybrid rice seeds Ganxiangyou463 - Google Patents

Abstract

The invention belongs to the field of hybrid rice seeds production, and relates to a method of taking a sterile line 'GanxiangA' and a restoring line 'early-indica restorer T0463' as male parents to produce hybrid rice seed 'Ganxiangyou463'. The production method includes inbred line selection, security isolation, timely sowing, sowing time adjustment, supplementary pollination with the '920' technique and artificiality, impurities and inferior removal, and timely harvest. The hybrid seeds have the advantages of high and stable yield, strong disease resistance and high biological yield.

Description

The production method in a kind of hybrid rice seeds Jiangxi fragrant excellent 463

Technical field:

The present invention relates to paddy rice cross breeding seed production field, relate to specifically the production method of a kind of hybrid rice.

Background technology:

China is Rice Cropping big country, in recent years along with the subsidy policy of country to Farming, and the growth of paddy purchasing price, Monitoring of Paddy Rice Plant Area has had stable increase.Within 2011, according to Ministry of Agriculture's investigation, national Monitoring of Paddy Rice Plant Area increased by 1.9% than upper one year, and wherein early rice cultivated area reaches 8,869 ten thousand mu, increases by 1,750,000 mu than last year.The per mu yield of paddy rice is also along with the popularization of new rice variety and the breeding corresponding cultivation techniques height of constantly bringing forth new ideas.

But China is populous nation, the four corners of the world, Rice Cropping region is vast in territory, and plantation climatic zone is various.And in recent years, the natural calamity of China takes place frequently, and it is occurred frequently that damage by disease and insect is, diversity state.Breeding high-yield, wide suitable, how anti-new rice variety are the important leverages of guarantee Food Security in China.

And along with the establishment of company of exotic industry, the introducing of its external advanced breeding technique and paddy rice resource, in order to ensure the safety in rice in China market, selects outstanding hybrid rice seed, it is also the extremely urgent task of rice in China breeding man.

Summary of the invention:

The object of the invention is to the New Hybrid Rice Combination for ensureing that our grain security and rice in China market safety are cultivated, and a kind of production method of the hybrid rice seeds of producing high yield is provided.

Hybrid rice seeds production method provided by the present invention: comprise selection inbred line, safety isolation, begin sowing in good time, regulate date of seeding, " 920 " technology of use and artificial supplementary pollination, roguing, results in good time, utilize male sterile line " the fragrant A in Jiangxi " for maternal, restorer " the early extensive To463 of Xian " is male parent, produces hybrid rice seed " Jiangxi fragrant excellent 463 ".

Hybrid rice kind " Jiangxi fragrant excellent 463 " is the rice varieties take early rice main producing region, In Middle And Lower Reaches of Changjiang River as breeding goal seed selection.

For selecting rice varieties of the present invention, the scientific research personnel of company select at present 30 hybrid rice seeds that 30 hybrid rice seeds before rank is promoted in this region and golden agriculture China selected totally 60 hybrid rice seeds carry out variety comparative test.The yielding ability of the hybrid rice seed that goes out there is male sterile line in above-mentioned hybrid rice kind blood relationship " the fragrant A in Jiangxi " or restorer " the early extensive To463 of Xian " by test data analyzer in this area is good, disease resistance is strong, and comprehensive resistance is good.

Therefore golden Nong Hua company take male sterile line " the fragrant A in Jiangxi " for maternal, take restorer " the early extensive To463 of Xian " for male parent production hybrid rice kind " Jiangxi perfume excellent 463 ".

Wherein said biomaterial " the fragrant A in Jiangxi ", draws from Inst. of Rice, Jiangx Prov. Academy of Agricultural Sciences, has applied for the protection of kind power, application number: 20090341.5.

Wherein said biomaterial " the early extensive To463 of Xian " draws the Institute of agricultural sciences from Hengyang City, and this kind has obtained the protection of new variety of plant power, kind power number: CNA20020263.4.

It is maternal that the present invention utilizes " Jiangxi fragrant A ", take " the early extensive To463 of Xian " for the feature of the hybrid rice seed " Jiangxi perfume excellent 463 " of male parent production as:

Bud scale look aubergine, leaf sheath look purple, leaf color green; Leaf length of blade second from the bottom is long, in leaf width of blade second from the bottom, the angle of leaf blade tip second from the bottom and stem is upright, leaf blade fine hair second from the bottom is close, leaf auricle look purple second from the bottom, leaf tip of a leaf length second from the bottom is short, and leaf tip of a leaf shape two second from the bottom is split, leaf tip of a leaf look white second from the bottom, leaf pulvinus look green second from the bottom; Sword-like leave blade curvature without; Color of the stigma purple; Long in culm length, in stem stalk thickness, in stem stalk stem number, stem culm base stipes bag, the color yellow of stem stalk joint, stem stalk internode look yellow; Sword-like leave length of blade is long, in sword-like leave width of blade, and sword-like leave blade angle intermediate form, in leaf number of the main culm, in spike length degree, fringe degree of stretching out is extracted out better, fringe type osculant, Secondary Branch stalk is few, in the middle of the vertical shape of fringe; In stem stalk resting bud vigor; Grain husk shell fine hair is many, clever sharp look purple; Number of grain per ear is many, in ripening rate, in seed holding; In sterile lemma length, sterile lemma look white, clever shell look stalk yellow; In grain length, to long, in grain width, grain shape elongated shape, in weight of thousand grain; In brown rice length, in brown rice width, brown rice shape spindle; Plant color of the leather light yellow.

Feature and the good effect of the rice paddy seed that hybrid rice production method of the present invention obtains:

The rice varieties that the present invention produces, 117.5 centimetres of plant heights, seedling stage, growing way was prosperous, in tillering ability; the percentage of earbearing tiller is high, and cane is sturdy, and lodging resistant force is strong, Ye Kuanzhong; uprightly, leaf look green, fringe is large; grain is many, and grain is heavy, and mu is fringe 16.5 ten thousand effectively; 27 centimetres of spike lengths, 167.5 of grain number per spikes, ripening rate 80%; 27.7 grams of thousand kernel weight, grain yellow, the 119.5 days time of infertility.

Within 2010, participate in the comparison experiment of company's Content Organizing, 581 kilograms of average yield per mus, than contrast, day excellent China accounts for volume increase 4.5%; Within 2011, participate in intra-company's comparison experiment, average yield per mu 580, than contrast volume increase 3.6%.See attached list 2, subordinate list 3.

Good effect of the present invention is:

1, output is high, and output exceedes on Vehicles Collected from Market main breed more than 3.6%;

2, resistance, middle blast resisting, high against-plant hopper and leaf blight;

3, wide adaptability, is adapted at the middle and lower reach of Yangtze River and how plant South China.

Embodiment

This embodiment is used for illustrating the present invention below, but is not used for limiting the scope of the invention.

Embodiment 1: the concrete Breeding Process of crossbreed of the present invention " Jiangxi fragrant excellent 463 "

Since 2007, golden Nong Hua company was collected in the rice varieties of first 30 of the In Middle And Lower Reaches of Changjiang River market ranking, and selects golden Nong Hua company 30 hybrid rice varieties of assembly voluntarily, carries out Engineering Breeding seed selection engineering.

Basis is by the plantation place of Cultivars and the weather conditions of place planting site, and damage by disease and insect segmentation breeding objective is swung to and elected.In Hainan, 10 experiment centres such as Guangdong, Changsha, Chongqing, Chengdu, Wuhan, six peaces, Hefei carry out field plot test experiment to the kind of collecting, experimental data is analyzed fully.

Analyze by the hybrid rice seed to planting experiment and parent's thereof disease or pest resistance and applicable weather conditions; And parent's coordinate force is identified.Select " the fragrant A in Jiangxi " and carry out assembly with " the early extensive To463 of Xian ", produce crossbreed rice paddy seed " Jiangxi fragrant excellent 463 ".

Rice paddy seed that the present invention produces " Jiangxi fragrant excellent 463 " was participated in intra-company's comparison experiment at 2010,2011, showed high yield, outstanding, the comprehensive drag of yielding ability is strong, accounts for average volume increase more than 3.6% than the excellent China in check variety sky.

1, the fragrant excellent 463 pairs of main diseases insect pest Comprehensive resistance evaluation results in Jiangxi in 2011

2, output performance:

1) company in 2010 produces and compares result of the test

581 kilograms of the crossbreed per mu yields that variety comparative test result in 2010 the present invention produces, than contrast, day excellent China accounts for volume increase 4.5%, in table 2.

2) company's comparison experiment result in 2011

The variety comparative test of 10 experiment stations of participation company in 2011,580 kilograms of average yield per mus, contrast day excellent China accounts for 560 kilograms of average yield per mus, on average increases production 3.6%, in table 3.

Table 2 each test site yield data unit of company: KG in 2010

Sequence number	Hold pilot	Per mu yield	Contrast day excellent China accounts for	Than CK ±
					1	Sanya, Hainan experiment station	565.3	546.1	3.5%
2	Experiment station of Guangzhou Guangdong	577.1	550.3	4.9%
					3	Changsha experiment station	589.9	569.3	3.6%
4	Chengdu, Sichuan experiment station	583.1	556.6	8.5%
					5	Wuhan, Hubei experiment station	586.1	568.3	3.1%
6	Yancheng, Jiangsu Province experiment station	579.5	552.3	4.9%
					7	Nanchang experiment station	591.3	565.4	4.6%
8	Yichuan experiment station	571.7	557.3	2.6%
					9	Shangrao, Jiangxi experiment station	582.4	552.6	5.4%
10	Jing Zhou, Hubei experiment station	583.3	563.9	3.4%

Table 3 each test site yield data unit of company: KG in 2011

Sequence number	Hold pilot	Per mu yield	Contrast day excellent China accounts for	Than CK ±
					1	Liu An experiment station, Anhui	587.2	560.1	4.8%
2	Hefei ,Anhui experiment station	577.1	548.3	5.3%
					3	Nanjing experiment station	579.1	556.2	4.1%
4	Zhejiang Hangzhou experiment station	588.6	562.4	4.6%
					5	Wuhu experiment station	577.5	558.3	3.4%
6	Yancheng, Jiangsu Province experiment station	585.6	563.4	3.9%
					7	Nanchang experiment station	569.1	561.1	1.4%
8	Yichuan experiment station	579.3	553.2	4.7%
					9	Shangrao, Jiangxi experiment station	575.3	554.3	4.1%
10	Jing Zhou, Hubei experiment station	579.3	581.2	0%

Embodiment 2: the production technology of crossbreed of the present invention

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

2) begin sowing in good time: first phase male parent is than maternal Zao inserting 25～30 days, or leaf order difference 6-7 leaf, or effective accumulated temperature Parent differs from 200 ℃, the second phase, the third phase are separated by 7 days with the first phase respectively, or two phase male parents are separated by 10 days.

3) rational close planting, suitable row ratio.Maternal seeding row spacing is 16.7 × 10 centimetres, and male parent spacing in the rows is 16.7 centimetres, 33.3 centimetres, aisle when duplicate rows is planted, and parental is 1:10～12.

4) use " 920 " technology and artificial supplementary pollination.5%-10% sprays 920 when maternal heading, and 20 grams of first every mu of sprays, spray 3-5 days afterwards continuously, spray 5 grams at every turn, total consumption 30-45 gram.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 kernel smut technology: prevent and treat continuously kernel smut 2-3 times at cut phase, fringe phase beginning and full heading time with the black spirit of going out (producer's medicine).

6) roguing technology: pull out form and maternal " the fragrant A in Jiangxi " discrepant plant whole breeding time, contain and spend latter about 25 days to gather in the crops hybrid seed.

Embodiment 3: the culture technique of crossbreed of the present invention

1) begin sowing in good time, cultivate strong seedling.According to working as ground temperature light resources reasonable arrangement date of seeding.Mu sowing quantity 1-1.5KG, one one heart stage of leaf of rice shoot, sprays the short tiller of the strong seedling of paclobutrazol, thin even broadcasting, 35 days length of time rice seedlings grow were advisable with interior.5 × 8 cun of first-class fertility field seeding row spacings, 4 × 9 cun of below average fertility field seeding row spacings, guarantee several seedling 8-10 ten thousand.

2) heavy base fertilizer application is answered in fertilising, early chases after tillering fertilizer, after dry field rehydration, mends potassium application, and the general mu in land for growing field crops is executed purity nitrogen 13-15KG.Mid-term is seedling dry field enough, and later stage alternation of wetting and drying is gathered in the crops the first seven day and cut off the water supply, in good time harvesting.

3) damage by disease and insect such as attention control rice blast, false smut.

Claims (7)

1. a production method for hybrid rice seeds " Jiangxi fragrant excellent 463 ", is characterized in that selecting rice sterile line " the fragrant A in Jiangxi " to do maternal, does male parent with rice restorer " the early extensive To463 of Xian ", produces hybrid rice seeds " Jiangxi fragrant excellent 463 ".

2. method according to claim 1, is characterized in that safe isolation distance >=500 meter, or is separated by and within 15 days, carries out above production of hybrid seeds isolation with the heading flowering period of described Parent.

3. method according to claim 1, interval sowing, is characterized in that first phase male parent is than the maternal Zao 25-30 days of inserting, or the poor 6-7 leaf of leaf age, or effective accumulated temperature Parent differs from 200 ℃, the second phase, the third phase are separated by 7 days with the first phase respectively, or two phase male parents are separated by 10 days.

4. method according to claim 1, is characterized in that maternal seeding row spacing is 16.7 × 10 centimetres, and male parent spacing in the rows is 16.7 centimetres, 33.3 centimetres, aisle when duplicate rows is planted, and parental is 1:10～12.

5. method according to claim 1, sprays 920 while it is characterized in that the maternal heading of 5%-10%, and 20 grams of first every mu of sprays, spray 3-5 days afterwards continuously, spray 5 grams at every turn, total consumption 30-45 gram.

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

7. according to the method described in claim l, it is characterized in that pulling out whole breeding time External Characters and maternal " the fragrant A in Jiangxi " discrepant plant, contain and spend latter 25 days results hybrid seeds.