CN105519426A - Production method for rice hybrid Jitian Yousimiao - Google Patents

Abstract

The invention belongs to the field of utilization of hybrid vigor and specifically discloses a production method for a rice hybrid Jitian Yousimiao. According to the invention, a rice sterile line Jitian A is used as a female parent and a rice restorer line Yuenong Simiao is used as a male parent to produce a hybrid rice seed Jitian Yousimiao. The rice hybrid has the characteristics of high and stable yield, strong disease resistance and high biological yield.

Description

The production method of the excellent silk seedling of a kind of hybrid rice seed Jitian

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 Rice Cropping big country, in recent years along with country is to the subsidy policy of 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 late 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 breeding corresponding cultivation techniques is constantly brought forth new ideas height.

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 damage by disease and insect is occurred frequently, diversity state.Breeding high-yield, wide suitable, many anti-new rice variety are the important leverages ensureing Food Security in China.

And along with the establishment of company of exotic industry, the introducing of its external advanced breeding technique and rice pest insects, 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 for ensureing the New Hybrid Rice Combination 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 selection inbred line, Secure isolation, begin sowing in good time, regulate date of seeding, " 920 " technology of use and artificial supplementary pollination, roguing, gathers in the crops in good time, utilizes male sterile line " Jitian A " for maternal, restorer " Guangdong agriculture silk seedling " is male parent, produces hybrid rice seed " the excellent silk seedling of Jitian ".

Hybrid rice kind " the excellent silk seedling of Jitian " is for breeding goal and the rice varieties of seed selection with late rice main producing region, In Middle And Lower Reaches of Changjiang River.

For selecting rice varieties of the present invention, 30 hybrid rice seeds that company scientific research personnel selects 30 hybrid rice seeds at present before rank is promoted in this region and golden agriculture China to select totally 60 hybrid rice seeds carry out variety comparative test.Go out in above-mentioned hybrid rice kind blood relationship to have that the yielding ability of hybrid rice seed in this area of male sterile line " Jitian A " or restorer " Guangdong agriculture silk seedling " is good by test data analyzer, disease resistance is strong, comprehensive resistance is good.

Therefore golden Nong Hua company is maternal with male sterile line " Jitian A ", with restorer " Guangdong agriculture silk seedling " for male parent; Produce hybrid rice kind " the excellent silk seedling of Jitian ".

Wherein said biomaterial " Jitian A " draws from Lianshanzhuangnationalityyaonationality Autonomous County Institute of agricultural sciences, and this kind applies for variety right, application number: 20130433.8.

Wherein said biomaterial " Guangdong agriculture silk seedling " draws from Inst. of Rice, Guangdong Academy of Agricultural Sciences, and this kind obtains New species right in plant, right number: 20130895.9.

The present invention utilizes " Jitian A " to be maternal, and the feature of the hybrid rice seed " the excellent silk seedling of Jitian " produced for male parent with " Guangdong agriculture silk seedling " is:

Leaf sheath purple of light color, two leaf auricle anthocyanins colour developings of falling have, and to strong in small ear the is coetonium sharp anthocyanin colored intensity of grain husk, in culm length, coetonium density of pubescent is close, and in number of grain per ear, brown rice length is long, and brown rice is of light color brown, brown rice fragrance without.

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

The rice varieties that the present invention produces, plant height 116.5 centimetres, 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, and fringe is large; grain is many, grain weight, the effective fringe 16.5 ten thousand of mu; spike length 27.5 centimetres, grain number per spike 167.5, ripening rate 80%; thousand kernel weight 28.55 grams, grain is yellow, the 118.5 days time of infertility.

Within 2013, participate in the comparison experiment of company Content Organizing, average yield per mu 583.1 kilograms, account for volume increase 5.4% than the excellent China in contrast sky; Within 2014, participate in intra-company's comparison experiment, average yield per mu 583.8, than contrast volume increase 4.8%.See attached list 1, subordinate list 2.

Good effect of the present invention is:

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

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 South China and plants manyly.

Accompanying drawing explanation

Fig. 1 is the concrete Breeding Process of crossbreed of the present invention " Jitian's excellent silk seedling ".

Embodiment

This embodiment is for illustration of 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 " Jitian's excellent silk seedling "

From 2010, 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 selected 30 hybrid rice varieties of golden Nong Hua company assembly voluntarily, carried out Engineering Breeding seed selection engineering.

Namely 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, Guangdong, Changsha, Chongqing, Chengdu, Wuhan, six peaces, 10 experiment centres such as Hefei carry out field plot test experiment to the kind of collecting, and analyze fully experimental data.

By analyzing the hybrid rice seed of planting experiment and the disease or pest resistance of parent thereof and applicable weather conditions; And the coordinate force of parent is identified.Select " Jitian A " and carry out assembly with " Guangdong agriculture silk seedling ", produce crossbreed rice paddy seed " the excellent silk seedling of Jitian ".

The rice paddy seed " the excellent silk seedling of Jitian " that the present invention produces participated in intra-company's comparison experiment at 2013,2014, and show high yield, yielding ability is outstanding, global resistance is strong, than check variety sky, excellent China accounts for average volume increase 5.0%.

Output shows:

1) company in 2013 produces and compares result of the test

The crossbreed per mu yield that variety comparative test result in 2013 the present invention produces 583.1 kilograms, than contrast sky, excellent China accounts for volume increase 5.4%, in table 1.

2) company's comparison experiment result in 2014

Within 2014, participate in the variety comparative test of 10 experiment stations of company, average yield per mu 583.8 kilograms, the contrast excellent China in sky accounts for average yield per mu 557.0 kilograms, on average increases production 4.8%, in table 2.

Each test site yield data unit of table 12013 year company: KG

Sequence number	Test location	Per mu yield	The contrast excellent China in sky accounts for	Than CK ±
					1	Sanya, Hainan experiment station	575.1	530.1	8.5％
2	Experiment station of Guangzhou Guangdong	589.7	549.1	7.4％ 2 -->
					3	Changsha experiment station	578.5	572.4	0.0％
4	Chengdu, Sichuan experiment station	578.2	545.1	6.1％
					5	Wuhan, Hubei experiment station	568.3	557.2	2.0％
6	Yancheng, Jiangsu Province experiment station	588.5	563.4	4.5％
					7	Nanchang experiment station	585.5	548.2	6.8％
8	Yichuan experiment station	590.4	570.3	3.5％
					9	Shangrao, Jiangxi experiment station	588.7	549.6	7.1％
10	Jing Zhou, Hubei experiment station	588.5	547.1	7.6％

Each test site yield data unit of table 22014 year company: KG

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

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

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

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

4) " 920 " technology and artificial supplementary pollination is used.Spray 920 during the heading of 5%-10% female parent, every mu sprays 20 grams for the first time, sprays 3-5 days continuously afterwards, each spray 5 grams, total consumption 30-45 gram.Pollen is caught up with to carry out artificial supplementary pollination whole flowering stage every day at florescence from fringe phase beginning to neat fringe.

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

6) roguing technology: pull out form and maternal " Jitian A " 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, rice shoot one leaf one heart stage, sprays paclobutrazol and strengthens seedling and urge tiller, thinly evenly to broadcast, and is advisable within 35 days length of time rice seedlings grow.First-class fertility field seeding row spacing 5 × 8 cun, below average fertility field seeding row spacing 4 × 9 cun, guarantees several seedling 8-10 ten thousand.

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

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

Claims (7)

1. a production method for the excellent silk seedling of hybrid rice seed Jitian, is characterized in that selecting rice sterile line " Jitian A " to do maternal, does male parent, produce hybrid rice seeds " the excellent silk seedling of Jitian " with rice restorer " Guangdong agriculture silk seedling ".

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

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

4. method according to claim 1, it is characterized in that female parent strain line-spacing is 16.7 × 10 centimetres, male parent spacing in the rows is 16.7 centimetres, and 33.3 centimetres, aisle when duplicate rows is planted, parental is 1:10 ~ 12.

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

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