CN1199541A

CN1199541A - Corn hybrid breeding method

Info

Publication number: CN1199541A
Application number: CN 98102627
Authority: CN
Inventors: 李华清; 潘才暹
Original assignee: SANGAO SEED INDUSTRY Co Ltd
Current assignee: SANGAO SEED INDUSTRY Co Ltd
Priority date: 1998-06-22
Filing date: 1998-06-22
Publication date: 1998-11-25
Anticipated expiration: 2018-06-22
Also published as: CN1089208C

Abstract

The present invention relates to the utilization of heterosis of corn and its technological feature is that single-cross hybrid You-8184 is bred by using self-line Duo 8-1 as female parent and Duo 4-1 as male parent. The trial plantation in several places shows that the said single-cross corn hybrid has obvious yield increasing effect.

Description

A kind of method of hybrid maize seed production

The invention belongs to corn hybrid use of advantage field.

Corn is " king of feed ", also is China's staple food crop, more than 300,000,000 mu of national annual maize planting area.Since the eighties, main recommended variety is No. 2, middle list, red beautiful No. 13, tuck in single No. 2, Yedan No.13 number etc.These kinds are planted the more than ten years, and kind property has in various degree degenerates, and add various new diseases and new biological strain harm, resistance obviously fails, cause general underproduction 5-10%, crushing damage by disease and insect is broken out sometimes in indivedual times or some areas therefore, causes the serious underproduction; On the other hand, along with development of social productivity, the raising of Fertilization Level and mechanization level, the improvement of culture technique, above-mentioned can not adapt to the situation the far away needs of development of kind of promoting mainly are badly in need of selecting good new varieties, to replace the kind of current production application.

The object of the invention is the serious problems at above-mentioned current corn production and corn variety existence, searching overcomes the method that there is defective in existing corn variety, utilize heterotic basic principle, extensively collect new germ plasm resource, create new breeding basic material, educate by Nan Fanbei, quicken seed selection from generation to generation, select a collection of resistance, wide adaptability, coordinate force height, the good inbred line that economical character is good, make high yield, high-quality, many anti-corn hybrid seeds, and propose a corresponding seeding technique of cover and a high-yield culture technique.

Below narrate main contents of the present invention:

1, producing method for seed: many 8-1 make female parent with inbred line, and many 4-1 are male parent, hybridization preparation single cross hybrid excellent 8141.Compound mode is (many 8-1 * many 4-1).

Fig. 1 is pedigree seed selection figure of the present invention

2, the feature of excellent 8141 seeds of single cross

Seedling stage, growing way was strong, and look dark green, the blade upper punch, and it is fast to send out seedling. The plant type compactness, plant is strong Strong, 270 centimetres of plant heights, 90 centimetres of fringe positions, the long cartridge type of fruit ear, 23 centimetres of spike lengths, fringe Thick 5.2 centimetres, seed 16 row, seed-producing rate 85%, half horse flute profile, mass of 1000 kernel 320 grams, The yellow cutin of seed is many, the unit weight height. Cane is sturdy, and lodging resistance is strong, the big stigma of high-resistance corn Disease, morbidity progression is the 0.5-2 level, anti-head-smut, bacterial wilt and virosis, the bar maturation of living. 120 days breeding times.

3, maternal many 8-1 feature

Many 8-1 are selected from the Bs of U.S. colony, form through the continuous multi-generation selfed breeding, and late type in the genus is in 115 days breeding times of Beijing.Seedling stage, plant was very dialled, and growth is very fast, blade half upper punch.Become 180 centimetres of plant heights, 90 centimetres of fringe positions belong to compact plant.The tassel branch is few, and side shoot is short and small, and pollen amount is less.The long cartridge type of fruit ear, 22 centimetres of spike lengths, grain line number 16 row, the seed yellow, half horse flute profile, the unit weight height is about thousand kernel weight 300 grams.Multi-resistant corn northern and southern leaf blight and head smut, multiple diseases such as resistance to bacterial wilt, virus disease.Well developed root system, lodging resistance is strong.General per mu yield is more than 300 kilograms.

3, many 4-1 of male parent feature

Be selected from (early yellow 4 * 22), 22 inbred lines derive from No. 1 colony in gulf of Thailand Soviet Union, and it is a large spike high yield colony, has tropical blood relationship, and breeding time is longer, early 4 hybridize with yellow in Guangxi winter, then to Beijing through many generations continuous selfed breeding form.Key property is resistance and the yielding ability with No. 1, gulf of Soviet Union, and yellow many fringes property of 4 early, plant type compactness, characteristics such as coordinate force height are arranged.Many 4-1 inbred line seedling leaf color is dark green, well developed root system, and waterlogging, drought resisting, capacity for the resistance to lodging are very strong.High-resistance corn northern and southern leaf blight and virus disease, resistance to bacterial wilt, multiple diseases such as head smut, the bar maturation of living.The dual spike rate height, fruit ear is thick, 19 centimetres of spike lengths, thick 5.0 centimetres of fringe, 16-18 is capable for the grain line number, the seed orange colour, the solids type, quality better, about thousand kernel weight 290 grams, 250 kilograms of general per mu yields.

Good effect of the present invention is:

1, excellent 8141 single cross hybrid stable high yield

In the multiple spot experiment and demonstration, 560 kilograms of average yield per mus, comparison is according to kind of Yedan No.13 number, agricultural university 60, red beautiful No. 13 increase yield significantlies.Ran under the severe drought condition in 1997 in Jilin, 520 kilograms of per mu yields, comparison be according to kind of red 703 volume increase 50.6%, position first of shelter is participated in the experiment kind.

2, output height during the parent propagation production of hybrid seeds, yield stability are good:

Because parents' resistance, yielding ability is good, and maternal compact large spike is suitable for dense planting, the output height, and general mu 4000-4500 strain, per mu yield are more than 300 kilograms, and the seed dehydration is fast, and quality is good, the market price height.

Below narrate embodiments of the invention:

Many 8-1 make female parent with inbred line, and many 4-1 are male parent, hybridization preparation single cross hybrid excellent 8141.Seeding technique of the present invention and culture technique get final product with the method that those skilled in that art know, but should note following item:

1, during the production of hybrid seeds, father and mother sow this same period, and row is than being advisable with 2: 4 or 2: 6.

2, excellent 8141 kinds, belong to the big fringe of many bars, compact requires high fertilizer and water condition cultivation, so that the performance production-increasing function is advisable about general 3500 strain/mus.

Claims

1, a kind of method of hybrid maize seed production is characterized in that making female parent with the many 8-1 of inbred line, and many 4-1 are male parent, hybridization preparation single cross hybrid excellent 8141.

2, method according to claim 1 is characterized in that maternal many 8-1 form through the continuous multi-generation selfed breeding from the Bs of U.S. colony

3, method according to claim 1 is characterized in that many 4-1 of male parent inbred line is that origin comes from Thailand Soviet Union No. 1 colony's 22 inbred lines in gulf and early 4 hybridizes with yellow, through many generations continuously selfed breeding forms.