CN103202218A - Production method for hybrid rice seeds Ganxiangyou309 - 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 'R309' as male parents to produce hybrid rice seed 'Ganxiangyou309'. 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 309

Technical field:

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

Background technology:

China is paddy rice plantation big country, in recent years along with the subsidy policy of country to the grain plantation, and the growth of paddy purchasing price, the paddy rice cultivated area has had stable increase.National paddy rice cultivated area increased by 1.9% than last 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, paddy fields territory 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 Chinese grain security.

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 objective of the invention is to for ensureing that the hybrid rice that our grain security and rice in China market are cultivated safely newly makes up, 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, safety is isolated, 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, recovering system " R309 " is male parent, produces hybrid rice seed " Jiangxi fragrant excellent 309 ".

Hybrid rice kind " Jiangxi fragrant excellent 309 " is to be breeding goal and the rice varieties of seed selection with early rice main producing region, area, the middle and lower reach of Yangtze River.

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 male sterile line is arranged in the above-mentioned hybrid rice kind blood relationship " the fragrant A in Jiangxi " by test data analyzer or recover that the yielding ability of hybrid rice seed in this area of system " R309 " is good, disease resistance is strong, comprehensive resistance is good.

So golden Nong Hua company be female parent with male sterile line " the fragrant A in Jiangxi ", be male parent production hybrid rice kind " Jiangxi perfume excellent 309 " to recover system " R309 ".

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 " R309 " is the seed selection voluntarily of golden Nong Hua company, and this kind has been applied for new variety of plant protection, application number: 20111131.3.

It is maternal that the present invention utilizes " the fragrant A in Jiangxi ", be that the feature of the hybrid rice seed " Jiangxi perfume excellent 309 " of male parent production is with " R309 ":

Bud scale look aubergine, leaf sheath look purple, leaf color green; Leaf length of blade second from the bottom is long, in the 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; The sword-like leave blade curvature does not have; The color of the stigma purple; Long in the culm length, in the stem stalk thickness, in the 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 the stem number of blade, in the 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 upright shape of fringe; In the stem stalk resting bud vigor; Grain husk shell fine hair is many, clever sharp look purple; Number of grain per ear is many, in the ripening rate, in the seed holding; In the sterile lemma length, sterile lemma look white, clever shell look stalk yellow; To long, in the grain width, grain shape elongated shape is in the weight of thousand grain in the grain length; In the brown rice length, in the brown rice width, 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, 119.5 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, leaf look green, fringe is big; grain is many, and grain is heavy, and mu is fringe 16.75 ten thousand effectively; 27.5 centimetres of spike lengths, 169.5 of grain number per spikes, ripening rate 82%; thousand kernel weight 28.75 grams, grain yellow, the 118.5 days time of infertility.

Participated in the product of company's content tissue in 2010 than experiment, 582.6 kilograms of average yield per mus, day excellent China accounts for volume increase 5.0% than contrast; Participated in intra-company's product in 2011 than experiment, average yield per mu 580.6 is than contrast volume increase 4.7%.See attached list 2, subordinate list 3.

Good effect of the present invention is:

1, output height, output surpass on the current market main breed more than 4.7%;

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 seed selection process of crossbreed of the present invention " Jiangxi fragrant excellent 309 "

Since 2007, golden Nong Hua company was collected in preceding 30 rice varieties of middle and lower reach of Yangtze River regional market rank, 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 the seed selection kind 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 plant identification experiment to the kind of collecting, experimental data is analyzed fully.

By the hybrid rice seed of planting experiment and parent's disease-resistant, worm property thereof are reached the weather conditions that are fit to and analyze; And parent's coordinate force is identified.Select " the fragrant A in Jiangxi " and carry out assembly with " R309 ", produce crossbreed rice paddy seed " Jiangxi fragrant excellent 309 ".

The rice paddy seed that the present invention produces " Jiangxi fragrant excellent 309 " than experiment, shows high yield at 2010,2011 participation intra-company product, outstanding, the comprehensive drag of yielding ability is strong, accounts for average volume increase more than 4.7% than contrasting the excellent China in kind sky.

1, fragrant excellent 309 pairs of main diseases insect pest resistance comprehensive 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 5.0% than contrast, sees Table 2.

2) company's product in 2011 compare experimental result

The variety comparative test of 10 experiment stations of participation company in 2011,580.6 kilograms of average yield per mus, contrast day excellent China accounts for 554.6 kilograms of average yield per mus, on average increases production 4.7%, 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	Experiment station, Sanya, Hainan	576.8	542.3	6.4%
2	Experiment station, Guangzhou, Guangdong	588.3	550.3	6.9%
					3	The experiment station, Changsha	581.9	576.4	0.1%
4	Experiment station, Chengdu, Sichuan	577.6	550.2	5.0%
					5	Experiment station, Wuhan, Hubei	585.1	565.2	3.5%
6	Experiment station, Yancheng, Jiangsu	583.5	556.3	4.9%
					7	The experiment station, Nanchang	586.3	554.3	5.8%
8	The experiment station, Yichuan	579.4	548.3	5.7%
					9	Experiment station, Shangrao, Jiangxi	586.4	550.6	6.5%
10	Experiment station, Jing Zhou, Hubei	580.4	549.9	5.5%

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	578.2	548.1	5.5%
2	The experiment station, Hefei ,Anhui	588.4	548.3	7.3%
					3	The experiment station, Nanjing	576.6	552.7	4.3%
4	The Zhejiang Hangzhou experiment station	583.6	551.4	5.8%
					5	The experiment station, Wuhu	575.5	551.3	4.4%
6	Experiment station, Yancheng, Jiangsu	578.6	560.9	3.2%
					7	The experiment station, Nanchang	572.3	551.1	3.8%
8	The experiment station, Yichuan	581.3	560.2	3.8%
					9	Experiment station, Shangrao, Jiangxi	583.1	559.2	4.3%
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 is isolated: space length〉500 meters, 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, and perhaps leaf order difference 6-7 leaf, or effective accumulated temperature father and mother originally 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 father and mother's one's own profession is than being 1:10～12.

4) use " 920 " technology and artificial supplementary pollination.Spray 920 during the heading of 5%-10% female parent, first every mu of spray 20 grams sprayed 3-5 days afterwards continuously, sprayed 5 grams, always 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: whole growing is pulled out form and maternal " the fragrant A in Jiangxi " discrepant plant, contains and spends back 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 rationally arranging date of seeding when the ground temperature light resources.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 piece seeding row spacings, 4 * 9 cun of below average fertility field piece 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 309 ".It is maternal to it is characterized in that selecting for use rice sterile line " the fragrant A in Jiangxi " to do, and " R309 " does male parent with rice restorer, produces hybrid rice seeds " Jiangxi fragrant excellent 309 ".

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, interval sowing is characterized in that first phase male parent was than maternal Zao slotting 25-30 days, perhaps leaf age difference 6-7 leaf, or the effective accumulated temperature father and mother originally differ 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 father and mother's one's own profession is than being 1:10～12.

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

6. method according to claim 1 is characterized in that preventing and treating kernel smut continuously 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 whole growing pulls out outside proterties and maternal " the fragrant A in Jiangxi " discrepant plant, contain and spend back 25 days results hybrid seeds.