CN103947543A - Production method of late mid-maturation rice hybrid seed Wufengyouhuazhan - Google Patents

Abstract

The invention belongs to the field of production rice hybrid seeds, and relates to a method for producing a hybrid rice seed Wufengyouhuazhan by using sterile line Wufeng A and restoring line Huazhan. The method comprises the following steps: selecting inbred line, carrying out security isolation, seeding in good time, adjusting the date of seeding, using a 920 technique and artificial supplementary pollination, roguing and harvesting in good time. The hybrid seed has the characteristics of high and stable productivity, high disease resistance and high biological yield.

Description

The production method that in a kind of late Xian, ripe hybrid rice seed five Feng You 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.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 producing the hybrid rice seeds of 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, utilize male sterile line " five rich A " for maternal in good time, restorer " China accounts for " is male parent, produces hybrid rice seed " five Feng You China account for ".

Hybrid rice kind " five Feng You China account for " is to take the rice varieties that late rice main producing region, In Middle And Lower Reaches of Changjiang River is 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.By test data analyzer, go out to have in above-mentioned hybrid rice kind blood relationship that the yielding ability of the hybrid rice seed of male sterile line " five rich A " or restorer " China accounts for " in this area is good, disease resistance is strong, comprehensive resistance is good.

Therefore male sterile line " five rich A " be take as maternal in golden Nong Hua company, the restorer " China accounts for " of take is male parent; Produce hybrid rice kind " five Feng You China account for ".

Wherein said biomaterial " five rich A " Yin Zi Inst. of Rice, Guangdong Academy of Agricultural Sciences, it is applied in rice breeding as breeding material, five Feng You 130 (wherein said biomaterial " five rich A " Yin Zi Inst. of Rice, Guangdong Academy of Agricultural Sciences, it is applied to Guangdong in rice breeding as breeding material and examines rice 200606) in 2006, pass through authorization, rice 2006062 is examined in Guangdong.

Wherein said biomaterial restorer " China accounts for " Yin Zi China Paddy Rice Inst, this kind has obtained the protection of new variety of plant power, kind power number: CNA20080059.0.

It is maternal that the present invention utilizes " five rich A ", take " China accounts for " be male parent production hybrid rice seed " five Feng You China account for " feature as:

This kind plant type is moderate, and leaf look dark green, and sword-like leave is straight and upright, and growing way is in great numbers, and tillering ability is strong, and effectively fringe is many, bran point purple, and grain number per spike is many, and ripening rate is higher, and thousand kernel weight is little, and ripe phase annesl is good.90.6 centimetres of plant heights, mu is fringe 23.9 ten thousand effectively, the percentage of earbearing tiller 61.1%, 125.7 of every total grain panicle numbers, several 98.1 of the real grain of every fringe, ripening rate 78.0%, 22.2 grams of thousand kernel weight.Brown rice yield 80.1%, polished rice rate 72.9%, head rice rate 61.7%, grain length 6.6mm, grain type aspect ratio 3.0, the white grain of chalk rate 30%, chalkiness degree 2.7%, amylose 15.5%, glue denseness 65mm.Rice matter reaches 3 grades of national best, and rice blast resistance spontaneous induction is identified: panicle blast is 9 grades, high sense rice blast; Panicle blast average loss rate is 5.9%.

Within 2011, participate in the comparison experiment of company's Content Organizing, 522.2 kilograms of average yield per mus, than contrast Yue You 9113 volume increase 12.8%; Within 2012, participate in intra-company's comparison experiment, average yield per mu 526.9, than contrast volume increase 14.7%.See attached list 1, subordinate list 2.

Good effect of the present invention is:

1, output is high, and output surpasses on Vehicles Collected from Market main breed more than 12.8%;

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 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 " five Feng You China account for "

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

According to being about to the plantation place of 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 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 thereof disease or pest resistance and applicable weather conditions are analyzed; And parent's coordinate force is identified.Select " five rich A " and carry out assembly with " China accounts for ", produce crossbreed rice paddy seed " five Feng You China account for ".

The rice paddy seed that the present invention produces " five Feng You China account for " was participated in intra-company's comparison experiment at 2011,2012, show high yield, outstanding, the comprehensive drag of yielding ability is strong, than the average volume increase 14% of check variety Yue You 9113.

2, output performance:

1) within 2011, participate in the comparison experiment of company's Content Organizing, 522.2 kilograms of average yield per mus, than contrast Yue You 9113 volume increase 12.8%;

2) within 2012, participate in intra-company's comparison experiment, average yield per mu 526.9.5, than contrast volume increase 14.7%.See attached list 1, subordinate list 2

Table 1 each test site yield data unit: KG of company in 2011

Table 2 each test site yield data unit: KG of company in 2012

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

1) safety isolation: space length >500 rice, or other rice varieties of the 15 days above heading flowering periods 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, and when duplicate rows is planted, 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 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.From fringe phase beginning to neat fringe, catch up with pollen to carry out artificial supplementary pollination whole flowering stage every day at florescence.

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

6) roguing technology: pull out form and maternal " five rich 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 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, 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. the production method that in Xian in evening, ripe hybrid rice seed five Feng You China account for, is characterized in that selecting rice sterile line " five rich A " to do maternal, with rice restorer " China accounts for ", does male parent, produces hybrid rice seeds " early Feng You China accounts for ".

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 maternal Zao slotting 25-30 days, 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, and when duplicate rows is planted, aisle is 33.3 centimetres, 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 " five rich A " discrepant plant, contain and spend latter 25 days results hybrid seeds.