CN101946693A - Seed production method for hybrid corn - Google Patents
Seed production method for hybrid corn Download PDFInfo
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- CN101946693A CN101946693A CN2010102545090A CN201010254509A CN101946693A CN 101946693 A CN101946693 A CN 101946693A CN 2010102545090 A CN2010102545090 A CN 2010102545090A CN 201010254509 A CN201010254509 A CN 201010254509A CN 101946693 A CN101946693 A CN 101946693A
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Abstract
The invention relates to a seed production method for hybrid corn Ludan 9032, and belongs to the technical field of core breeding. According to the seed production method for the hybrid corn Ludan 9032, the hybrid corn Ludan 9032 is obtained by hybridizing a female parent 1x00-1 and a male parent 1x03-2. The prepared Ludan 9032 has high yield, generally 5,500 to 6,000 strains are planted in each mu, and the yield of each mu is over 350 kilograms; and the Ludan 9032 has the advantages of strong stress resistance, high small spot disease and large spot disease resistance, Curvularia leaf spot resistance, high stem rot resistance, gall smut resistance and medium dwarf mosaic disease resistance.
Description
Technical field
The present invention relates to the producing method for seed of a kind of hybrid maize, belong to the corn breeding techniques field.
Background technology
Corn has developed into the first crop of China.Over past ten years, China's maize sown area is increased to more than 4.5 hundred million mu in 2008 by 3.46 hundred million mu in 2000, and gross yield is increased to 1.6 hundred million tons from 1.0 hundred million tons.But, still present the serious situation that supply falls short of demand at present because its special feed and industrial processes are worth.
Worsen and apply under the too single situation of kind at natural climate condition, widen germplasm, and then breeding high-yield, stable yields, wide adaptation type new varieties are important further.At the Yellow River and Huai He River Hai Xiayumiqu, can utilize the compact kind, increase planting density raising population yield and obtain higher economic flow rate; Perhaps plant half compact corn variety, guaranteeing under the situation about suiting breeding time,, do not reducing under the planting density prerequisite and then the grain number per spike and the thousand kernel weight of improving corn hybrid seed by improving the biological yield of corn individual plant and colony greatly.
The objective of the invention is to utilize existing material technology platform, the set excellent germplasm, further excavate heterotic potentiality, make single plant yield, planting density, comprehensive resistance and quality reach balance, the middle large spike corn hybrid seed of breeding high-yield, stable yields, high-quality, many anti-, wide adaptabilities.
Summary of the invention
At the deficiencies in the prior art, the invention provides the producing method for seed of a kind of hybrid maize Shandong single 9032.
The producing method for seed of a kind of hybrid maize Shandong single 9032, it is obtained by maternal lx00-1 and male parent lx03-2 hybridization back.
Described maternal lx00-1 is the commercially available prod, also can adopt following method to obtain:
After the selfing of 6～8 generations, it is neat 319 to obtain the parent with american corn crossbreed 78599, will draw outward then be U8112 as maternal with neat 319 hybridization of parent after the selfing of 4～6 generations obtain.
The principal character of maternal lx00-1 is as follows:
The plant type compactness, the leaf look dark green, robust plant, 1.90 meters of plant heights, the fringe position is high 0.80 meter, and the tassel branch is few, fruit ear cylindricality, 12～13 centimetres of spike lengths, tassel row number 12～14 row, seed wedge shape, yellow, horse flute profile partially.Anti-southern rust, stem rot, leaf blight, helminthosporium maydis, Curvularia lunata leaf spot, in anti-rough dwarf disease.
Described male parent lx03-2 is the commercially available prod, also can adopt following method to obtain:
It is after the selfing of 4～6 generations that 502 * H21 is drawn outward, obtains parent lx9801, then parent lx9801 and prosperous 7-2 are drawn outward be hybridization after, obtain through the selfing of 4～6 generations.
The principal character of male parent lx03-2 is as follows:
Plant type is compact, and leaf look pale green arrives green, in the colour developing of the first leaf sheath anthocyanin, and 1.80 meters of plant heights, the fringe position is high 0.60 meter, in the tassel branch, the fruit ear tubular, 8～9 centimetres of spike lengths, tassel row number 14～16, seed are the yellow grain of horse flute profile, the particle shape wedge type.Diseases such as the little leaf spot of the Chinese People's Anti-Japanese Military and Political College, head smut.
By the Shandong list 9032 that this method is cultivated, the plant type hemicompact is gathered, 20 of the complete stool numbers of blade, and seedling leaf sheath purple, the filigree redness, the flower pesticide yellow, 262 centimetres of plant heights, the fringe position is high 109 centimetres.101 days breeding times of the Yellow River and Huai He River sea summer sowing.The fruit ear tubular, 18.4 centimetres of spike lengths, thick 4.7 centimetres of fringe, tassel row number 12～14 row, red axle, the yellow grain of half horse flute profile, seed-producing rate 84.6%, thousand kernel weight 345.5 grams, unit weight 724.0 grams per liters.High anti-helminthosporium maydis and leaf blight, anti-Curvularia lunata leaf spot, high sense stem rot, anti-gall smut, in anti-short mosaic disease.Can utilize as the summer corn variety popularization in suitable areas, province such as Shandong Province, but retransmit Qu Shenyong in stem rot.Suitable Density is every mu 3500～4000 strain, and rich water is rationally used in attention in 550 kilograms of management of per mu yield, anti-down folding, and other control measures are with general land for growing field crops.
Good effect of the present invention is:
1, output height
(1) hybrid seed yield height, the crossbreed production cost is low: since parents' plant type compactness or compact, suitable dense planting, general every mu of plantation 5500～6000 strains, per mu yield is more than 350 kilograms.
(2) a crossbreed generation (F
1) the output height: in the test of Shandong Province's corn hybrid seed preliminary experiment A in 2004 group, average yield per mu 644.6kg, comparison is all increased production according to kind tucking in 22.0%, 5 pilot of single No. 4 volume increase, occupies first.In Shandong Province corn hybrid seed regional test A group in 2005 test, average yield per mu 586.4kg, comparison is according to kind of Zheng Dan 958 volume increase 7.24%, and volume increase reaches utmost point significance level.In Shandong Province corn hybrid seed regional test A group in 2006 test, average yield per mu 588kg, comparison is according to kind of Zheng Dan 958 volume increase 6.85%, and volume increase reaches utmost point significance level, occupies the 5th.In Shandong Province's corn hybrid seed production test in 2007, average yield per mu 574.4kg, comparison is according to Zheng Dan 958 volume increase 3.62%.
2, strong stress resistance
Identify according to the inoculation of Inst. of Plant Protection, Hebei-Prov. Academy of Agricultural and Forestry Scie disease resistance: single 9032 high anti-helminthosporium maydis and the leaf blight in Shandong, anti-Curvularia lunata leaf spot, high sense stem rot, anti-gall smut, in anti-short mosaic disease.Suit at Shandong Province's summer corn district popularizing planting.
Embodiment
Below in conjunction with embodiment the present invention is further elaborated.
The crossbreed of american corn described in the embodiment 78599 come from U.S. Pioneer Electronic Corp., 502 and H21 to draw outward be to draw respectively that to draw outside by seeds company and Laiyang Agricultural College, prosperous 7-2 from the west, Laizhou be to draw from Anyang, Henan Province institute of agricultural sciences.
Embodiment
The preparation of maternal lx00-1:
After the selfing of 7 generations, the parent is neat 319 with american corn crossbreed 78599, will draw outward then parent U8112 as maternal with neat 319 hybridization of parent after the selfing of 5 generations obtain.
The preparation of male parent lx03-2:
It is after the selfing of 5 generations that 502 * H21 is drawn outward, obtains parent lx9801, then parent lx9801 and prosperous 7-2 are drawn outward be hybridization after, obtain through the selfing of 5 generations.
With lx00-1 is maternal, and lx03-2 is a male parent, and the hybridization back obtains Shandong single 9032.
1, choosing ground and isolated area setting: the field piece of selecting medium above fertility, high yields irrespective of drought or water logging is as seed farm.Secure isolation zone is set, and the breeding inbred line will be more than 500 meters; Hybrid seeding will be more than 300 meters.
2, rational close planting: seed farm male parent female parent is advisable with 1: 4～5, and every mu of plantation female parent is 5000～5500 strains, and male parent is 1000～1200 strains.
3, the maternal date of seeding adjusting of male parent: at first predict the florescence, the control female parent does not launch leaf and lacks 1.5～2 than male parent, flower synchronization.If male parent is evening partially, reply male parent short its that apply fertilizer partially, water partially grown, or suitably postpones the maternal castration time under the situation that guarantees safety.If maternal evening partially, can take to be with in advance leaf to castrate, cut mode such as maternal female tip of the spike bract to promote the filigree growth.Regulate the general principle of grasping of florescence: short control slowly is fast, would rather female parent etc. male parent, can not male parent etc. female parent.
4, castrate impurity elimination: it is of paramount importance link in the corn seed producing process that female parent is castrated, and requirement in time, all, totally, is not thoroughly stayed break branch, residual fringe, does not throw out tassel without care.Time can be chosen in maternal tassel extraction top 1/3 and not carry out before the loose powder as yet; Or castrate by touching bud, effectively avoiding castrating untimely phenomenon, and can do sth. in advance maternal female fringe and grow, prolong grouting time, improve hybrid seed yield.Carry out three impurity eliminations in seedling stage, shooting stage, before taking out male loose powder,, remove large and small seedling, sick seedling, bad seedling, make maternal uniformity in conjunction with final singling; The male parent impurity elimination should be pursued the strain inspection, keeps seedlings and seedling with male parent feature, to prolong the loose powder phase, guarantees that maternal fully pollination is solid.
5, harvest in proper late, airing in time: milk-line disappears, and seed point hat black layer occurs with the embryo joint, enters full ripening stage, can gather in the crops.Just the seed moisture content of results is higher, easily goes rotten, and timely airing, in order to avoid reduce percentage of seedgermination.
Field experiment:
Shandong single 9032 has higher yield potentiality, Shandong Province 61 farm corn with high yield tackling key problem Tanakas in 2009, and 1024.29 kilograms of 3.6 mu of single 9032 average yield per mus in Shandong.
Claims (3)
1. the producing method for seed of a hybrid maize Shandong single 9032 is characterized in that, it is obtained by maternal lx00-1 and male parent lx03-2 hybridization back.
2. producing method for seed as claimed in claim 1 is characterized in that, described maternal lx00-1 adopts following method to obtain:
After the selfing of 6～8 generations, it is neat 319 to obtain the parent with american corn crossbreed 78599, outer then draw parent U8112 as maternal with neat 319 hybridization of parent after the selfing of 4～6 generations obtain.
3. producing method for seed as claimed in claim 1, it is characterized in that described male parent lx03-2 adopts following method to obtain: it is after the selfing of 4～6 generations that 502 * H21 is drawn, and obtains parent lx9801 outward, then parent lx9801 and prosperous 7-2 are drawn outward be hybridization after, obtain through the selfing of 4～6 generations.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102545090A CN101946693A (en) | 2010-08-16 | 2010-08-16 | Seed production method for hybrid corn |
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| CN2010102545090A CN101946693A (en) | 2010-08-16 | 2010-08-16 | Seed production method for hybrid corn |
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| CN101946693A true CN101946693A (en) | 2011-01-19 |
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| CN2010102545090A Pending CN101946693A (en) | 2010-08-16 | 2010-08-16 | Seed production method for hybrid corn |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102747135A (en) * | 2012-07-20 | 2012-10-24 | 青岛农业大学 | Early identification method for curvularia leaf spot in maize inbred lines |
| CN112335542A (en) * | 2020-04-22 | 2021-02-09 | 北京市农林科学院 | Castration quality-keeping method for hybrid corn seed production |
-
2010
- 2010-08-16 CN CN2010102545090A patent/CN101946693A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102747135A (en) * | 2012-07-20 | 2012-10-24 | 青岛农业大学 | Early identification method for curvularia leaf spot in maize inbred lines |
| CN112335542A (en) * | 2020-04-22 | 2021-02-09 | 北京市农林科学院 | Castration quality-keeping method for hybrid corn seed production |
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Application publication date: 20110119 |