CN102986522A - Method for producing hybrid rice seeds Liangyou huazhan - Google Patents

Abstract

The invention belongs to the field of production of hybrid rice seeds and discloses a method for producing hybrid rice seeds Liangyou huazhan by taking a sterile line 1892S and a restoring line Huazhan as male parents. The method comprises the following steps: selfing line selection, safety isolation, timely sowing, sowing time regulation, pollination based on a 920 technology and artificial assistance, impurity and inferior removal, and timely harvesting. The hybrid rice seeds have the characteristics of high and stable yield, strong disease resistance, and high biological yield.

Description

The production method that a kind of hybrid rice seeds two excellent China account for

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.National Monitoring of Paddy Rice Plant Area increased by 1.9% than upper one year according to Ministry of Agriculture's investigation in 2011, and wherein the early rice cultivated area reaches 8,869 ten thousand mu, increases by 1,750,000 mu than the 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, and the four corners of the world, Rice Cropping zone is vast in territory, and the 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, the diversity state.Breeding high-yield, wide suitable, many anti-new rice variety are the important leverages that ensures 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, is selected outstanding hybrid rice seed, also is 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 producing the hybrid rice seeds of high yield is provided.

Hybrid rice seeds production method provided by the present invention: comprise the selection inbred line, the safety isolation, begin sowing in good time, regulate date of seeding, " 920 " technology of use and artificial supplementary pollination, roguing, results utilize male sterile line " 1892S " for maternal in good time, restorer " China accounts for " is male parent, and " two is excellent to produce hybrid rice seed

China accounts for ".

Hybrid rice kind " two excellent China account for " is the rice varieties take In Middle And Lower Reaches of Changjiang River early rice main producing region as the 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 zone and golden farming China selected totally 60 hybrid rice seeds carry out variety comparative test.Go out to have in the above-mentioned hybrid rice kind blood relationship that the yielding ability of the hybrid rice seed of male sterile line " 1892S " or restorer " China accounts for " in this area is good, disease resistance is strong by test data analyzer, comprehensive resistance is good.

So golden Nong Hua company is take male sterile line " 1892S " as maternal, take restorer " China accounts for " as male parent; Produce hybrid rice kind " two excellent China account for ".

Wherein said biomaterial " 1892S " draws from Paddy Rice Inst., Anhui Agriculture Science Academy, and this kind has obtained new variety of plant power.Kind power number: CNA 20040612.4.

Wherein said biomaterial restorer " China accounts for " is drawn from China Paddy Rice Inst, and this kind has been applied for new variety of plant protection, application number 20080059.0.

It is maternal that the present invention utilizes " 1892S ", take " China accounts for " as male parent the feature of the hybrid rice seed " two excellent China account for " of production as:

Bud scale look aubergine, leaf sheath look purple, leaf color is green; In the leaf length of blade second from the bottom, in the leaf width of blade second from the bottom, the angle of leaf blade tip second from the bottom and stem is open and flat, 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 purple second from the bottom; The sword-like leave blade curvature without; Long in the culm length, stem stalk thickness is thick, in the stem stalk stem number, and stem culm base stipes bag, the green of light color of stem stalk joint, stem stalk internode look green; In the sword-like leave length of blade, in the sword-like leave width of blade, in the middle of the sword-like leave blade angle, in the leaf number of the main culm, the spike length degree is long, and fringe degree of stretching out is extracted out better, fringe type osculant, and the Secondary Branch stalk is many, in the middle of the vertical shape of fringe; In the stem stalk resting bud vigor; Grain husk shell fine hair is many, and clever sharp look red; Number of grain per ear is many, in the ripening rate, in the seed holding; Sterile lemma length is short, and sterile lemma look stalk is yellow, and clever shell look yellow; Grain length is long, and in the grain width, grain shape elongated shape is in the weight of thousand grain; Brown rice length is long, in the brown rice width, and brown rice shape spindle; It is light yellow to plant color of the leather.

Characteristics 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, 118 centimetres of plant heights, seedling stage, growing way was prosperous, in the tillering ability; the percentage of earbearing tiller is high, and cane is sturdy, and lodging resistant force is strong, Ye Kuanzhong; uprightly, the leaf look green, and fringe is large; grain is many, and grain is heavy, and mu is fringe 16.7 ten thousand effectively; 27.5 centimetres of spike lengths, 167.5 of grain number per spikes, ripening rate 80%; thousand kernel weight 29 grams, grain is yellow, the 118.5 days time of infertility.

Participated in the comparison experiment of company's Content Organizing in 2010,587 kilograms of average yield per mus, the excellent China in contrast sky accounts for volume increase 5.6%; Participated in intra-company's comparison experiment in 2011, average yield per mu 587.1, contrast volume increase 5.2%.See attached list 2, subordinate list 3.

Good effect of the present invention is:

1, output is high, and output surpasses on the Vehicles Collected from Market main breed more than 5.1%;

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 the South China.

Embodiment

Below this embodiment be used for explanation the present invention, but be not used for limiting the scope of the invention.

Embodiment 1: the concrete Breeding Process of crossbreed of the present invention " two excellent China account for "

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

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

By the hybrid rice seed of planting experiment and parent's disease or pest resistance and suitable weather conditions thereof are analyzed; And parent's coordinate force is identified.Select " 1892S " and carry out assembly with " China accounts for ", produce crossbreed rice paddy seed " two excellent China account for ".

The rice paddy seed that the present invention produces " two excellent China account for " was participated in intra-company's comparison experiment at 2010,2011, show high yield, outstanding, the comprehensive drag of yielding ability is strong, and the excellent China in were sky accounts for average volume increase more than 5.0%.

1, two excellent China in 2011 account for main diseases insect pest Comprehensive resistance evaluation result

2, output performance:

1) company in 2010 produces than the test result

587 kilograms of the crossbreed per mu yields that as a result the present invention of variety comparative test in 2010 produces, the excellent China in contrast sky accounts for volume increase 5.6%, sees Table 2.

2) comparison experiment result of company in 2011

The variety comparative test of 10 experiment stations of participation company in 2011,587.1 kilograms of average yield per mus, contrast day excellent China accounts for 558.1 kilograms of average yield per mus, on average increases production 5.2%, sees Table 3.

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

Sequence number	Hold pilot	Per mu yield	Contrast day excellent China accounts for	Than CK ±
					1	The Sanya, Hainan experiment station	581.2	536.0	8.4%
2	The Guangzhou Guangdong experiment station	587.7	545.1	7.8%
					3	The experiment station, Changsha	582.5	570.4	2.1%
4	Experiment station, Chengdu, Sichuan	589.1	555.1	6.1%
					5	Experiment station, Wuhan, Hubei	588.3	587.3	0.0%
6	The Yancheng, Jiangsu Province experiment station	585.5	550.3	6.4%
					7	The experiment station, Nanchang	595.7	558.3	6.7%
8	The experiment station, Yichuan	585.4	565.3	3.6%
					9	Experiment station, Shangrao, Jiangxi	588.7	550.6	6.9%
10	Experiment station, Jing Zhou, Hubei	585.5	544.9	7.5%

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

Sequence number	Hold pilot	Per mu yield	Contrast day excellent China accounts for	Than CK ±
					1	Six peace experiment stations, Anhui	591.3	555.1	6.5%
2	The experiment station, Hefei ,Anhui	580.5	545.3	6.5%
					3	The experiment station, Nanjing	582.5	543.1	7.2%
4	The Zhejiang Hangzhou experiment station	595.6	565.4	5.3%
					5	The experiment station, Wuhu	581.5	562.3	3.4%
6	The Yancheng, Jiangsu Province experiment station	590.6	546.2	8.1%
					7	The experiment station, Nanchang	591.5	569.3	3.9%
8	The experiment station, Yichuan	590.3	570.2	3.5%
					9	Experiment station, Shangrao, Jiangxi	580.3	560.2	3.6%
10	Experiment station, Jing Zhou, Hubei	587.3	564.2	4.1%

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

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

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

3) rational close planting, suitable row ratio.Maternal seeding row spacing is 16.7 * 10 centimetres, 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 parental is 1:10 ~ 12.

4) use " 920 " technology and artificial supplementary pollination.5%-10% sprays 920 during maternal heading, and first every mu of spray 20 grams 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 the kernel smut technology: black spirit (producer's medicine) prevents and treats kernel smut 2-3 times continuously at cut phase, fringe phase beginning and full heading time with going out.

6) roguing technology: pull out form and maternal " 1892S " discrepant plant whole breeding time, contain and spent rear about 25 days to gather in the crops hybrid seed.

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

1) begins sowing in good time, cultivate strong seedling.According to when ground temperature light resources reasonable arrangement date of seeding.Mu sowing quantity 1-1.5KG, one heart stage of rice shoot one leaf, spray 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 are guaranteed several seedling 8-10 ten thousand.

2) heavy base fertilizer application is answered in fertilising, early chases after tillering fertilizer, mends potassium application after the dry field rehydration, and the general mu in land for growing field crops is executed purity nitrogen 13-15KG.Mid-term is the seedling dry field enough, and the 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. the production method of a hybrid rice seeds " two excellent China account for ".It is maternal to it is characterized in that selecting rice sterile line " 1892S " to do, and does male parent with rice restorer " China accounts for ", produces hybrid rice seeds " two excellent China account for ".

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

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

4. method according to claim 1 is characterized in that maternal seeding row spacing is 16.7 * 10 centimetres, 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 parental is 1:10 ~ 12.

5. method according to claim 1 sprays 920 when it is characterized in that the maternal heading of 5%-10%, and first every mu of spray 20 grams 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 described method of claim l, it is characterized in that pulling out whole breeding time External Characters and maternal " 1892S " discrepant plant, contain and spend rear 25 days results hybrid seeds.