CN103081799A - Production method of hybrid rice seed - Google Patents

Abstract

The invention belongs to the field of rice hybrid seed production, and discloses a method for producing hybrid rice seed 'Ganxiangyou 107' by taking a sterile line 'Ganxiang A' and a restoring line 'T0107' as male parents. The method comprises the steps of selection of a selfing line, safe isolation, timely seeding and adjustment of seeding time; and impurities and inferior seeds are removed by using '920' technology and artificial supplementary pollination, and the seeds are harvested in due time. Through the invention, the hybrid has the characteristics of high yield, stable yield, strong disease resistance and high biological yield.

Description

A kind of production method of hybrid rice seeds

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, the wide new rice varieties of fitting, resisting more 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, 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 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 " the fragrant A in Jiangxi " for maternal in good time, restorer " T0107 " is male parent, produces hybrid rice seed " Jiangxi fragrant excellent 107 ".

Hybrid rice kind " Jiangxi fragrant excellent 107 " is to take In Middle And Lower Reaches of Changjiang River early rice main producing region as the rice varieties of 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 agriculture China selected totally 60 hybrid rice seeds carry out variety comparative test.Go out male sterile line is arranged in above-mentioned hybrid rice kind blood relationship " Jiangxi fragrant A " by test data analyzer or the yielding ability of hybrid rice seed in this area of restorer " T0107 " is good, disease resistance is strong, comprehensive resistance is good.

Therefore golden Nong Hua company take male sterile line " the fragrant A in Jiangxi " for maternal, the production hybrid rice kind " Jiangxi perfume excellent 107 " take restorer " T0107 " as male parent.

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 " T0107 " is the seed selection voluntarily of golden Nong Hua company, and this kind has been applied for new variety of plant protection, application number: 20110768.5.

It is maternal that the present invention utilizes " the fragrant A in Jiangxi ", the feature of the hybrid rice seed of production take " T0107 " as male parent " Jiangxi perfume excellent 107 " as:

Bud scale look aubergine, leaf sheath look purple, leaf color is 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 second from the bottom is green; The sword-like leave blade curvature without; The 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; The sword-like leave length of blade is long, in the sword-like leave width of blade, and sword-like leave blade angle intermediate form, in leaf number of the main culm, in the spike length degree, fringe degree of stretching out is extracted out better, fringe type osculant, the 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 is yellow; In grain length, to long, in the grain width, grain shape elongated shape is in weight of thousand grain; In brown rice length, in the brown rice width, brown rice shape spindle; Plant color of the leather light yellow.

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, 116.5 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, the leaf look green, and fringe is large; grain is many, and grain is heavy, and mu is fringe 16.0 ten thousand effectively; 28 centimetres of spike lengths, 168.6 of grain number per spikes, ripening rate 80%; thousand kernel weight 25.75 grams, grain is yellow, the 119.5 days time of infertility.

Participated in the comparison experiment of company's Content Organizing in 2010,582.6 kilograms of average yield per mus, day excellent China accounts for volume increase 4.9% than contrast; Participated in intra-company's comparison experiment in 2011, average yield per mu 584.2 is than contrast volume increase 5.0%.See attached list 2, subordinate list 3.

Good effect of the present invention is:

1, output is high, and output surpasses on Vehicles Collected from Market main breed more than 4.8%;

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 " Jiangxi fragrant excellent 107 "

Since 2007, golden Nong Hua company was collected in the rice varieties of front 30 of the In Middle And Lower Reaches of Changjiang River market ranking, and selected golden Nong Hua company 30 hybrid rice varieties of assembly voluntarily, 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 " the fragrant A in Jiangxi " and carry out assembly with " T0107 ", produce crossbreed rice paddy seed " Jiangxi fragrant excellent 107 ".

The rice paddy seed that the present invention produces " Jiangxi fragrant excellent 107 " was participated in intra-company's comparison experiment at 2010,2011, showed high yield, outstanding, the comprehensive drag of yielding ability is strong, and excellent China accounts for average volume increase more than 4.9% than contrast kind sky.

1, fragrant excellent 107 pairs of main diseases insect pest Comprehensive resistance evaluation results in Jiangxi in 2011

2, output performance:

1) company in 2010 produces than the test result

582.6 kilograms of the crossbreed per mu yields that variety comparative test the present invention as a result in 2010 produces, day excellent China accounts for volume increase 4.9% than contrast, sees Table 2.

2) company's comparison experiment result in 2011

The variety comparative test of 10 experiment stations of participation company in 2011,584.2 kilograms of average yield per mus, the excellent China in contrast sky accounts for 556.5 kilograms of average yield per mus, on average increases production 5.0%, 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	578.5	541.0	6.9%
2	The Guangzhou Guangdong experiment station	585.5	552.1	6.0%
					3	The experiment station, Changsha	582.5	576.4	1.0%
4	Experiment station, Chengdu, Sichuan	578.5	549.3	5.3%
					5	Experiment station, Wuhan, Hubei	585.1	566.0	3.4%
6	The Yancheng, Jiangsu Province experiment station	582.5	558.3	4.3%
					7	The experiment station, Nanchang	585.7	556.3	5.3%
8	The experiment station, Yichuan	580.4	550.3	5.5%
					9	Experiment station, Shangrao, Jiangxi	587.7	553.6	6.2%
10	Experiment station, Jing Zhou, Hubei	579.5	550.9	5.2%

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	The experiment station is pacified in Anhui six	579.3	548.1	5.7%
2	The experiment station, Hefei ,Anhui	586.5	550.3	6.6%
					3	The experiment station, Nanjing	578.5	549.2	5.3%
4	The Zhejiang Hangzhou experiment station	589.6	555.4	6.2%
					5	The experiment station, Wuhu	580.5	556.3	4.4%
6	The Yancheng, Jiangsu Province experiment station	588.6	562.5	4.6%
					7	The experiment station, Nanchang	579.5	551.2	5.1%
8	The experiment station, Yichuan	588.3	568.2	3.5%
					9	Experiment station, Shangrao, Jiangxi	583.3	560.2	4.1%
10	Experiment station, Jing Zhou, Hubei	588.3	563.2	4.5%

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

1) safety isolation: space length〉500 meters, or be separated by that more than 15 days, other rice varieties of heading flowering period 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, 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 when duplicate rows is planted, the aisle is 33.3 centimetres, 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, total consumption 30-45 gram at every turn.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 " the fragrant A in Jiangxi " 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) begin 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 one heart stage of leaf of rice shoot, 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 " Jiangxi fragrant excellent 107 ".It is characterized in that selecting rice sterile line " the fragrant A in Jiangxi " to do maternal, " T0107 " does male parent with rice restorer, produces hybrid rice seeds " Jiangxi fragrant excellent 107 ".

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 when duplicate rows is planted, the aisle is 33.3 centimetres, and parental is 1:10 ~ 12.

5. method according to claim 1, spray 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, total consumption 30-45 gram at every turn.

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