Fast and efficvent corn shuttle pedigree breeding process

A high-efficiency technology for corn, applied in botany equipment and methods, plant genetic improvement, application, etc., can solve the problems of not meeting the needs of corn variety replacement, affecting the development of corn production, long breeding cycle, etc., to reduce the planting scale, Improve breeding efficiency and accelerate the effect of generation process

Inactive Publication Date: 2004-09-08
SICHUAN AGRI UNIV +1
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  • Description
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  • Application Information

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Problems solved by technology

Its breeding cycle is long and its efficiency is low, so it cannot meet the needs of

Method used

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  • Fast and efficvent corn shuttle pedigree breeding process
  • Fast and efficvent corn shuttle pedigree breeding process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0022] 1. Breeding of inbred line K236 and hybrid Zhenghong 2:

[0023] The first year (1998): Spring and summer in Sichuan (northern season, referred to as Sichuan, the same below): Plant 100 American corn belt germplasm 3163 basic materials according to the breeding objectives, and select robust growth, good plant type, and disease resistance 20 strong excellent plants were bagged and self-bred, and 10 excellent S plants were harvested 1 Fruit ears, do a good job in genealogical records.

[0024] Autumn and winter in Hainan (against the season in the south, referred to as Hainan, the same below): planting S by ear 1 , 40 plants were planted in each panicle row, and 5-10 excellent plants with vigorous growth, strong resistance and good plant type were selected for each panicle row to obtain S 2 ; Plant some excellent inbred lines such as 48-2 as the parents of the test species, use pollen to test cross with 3-5 excellent backbone inbred lines respectively at the same time w...

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Abstract

The present invention discloses one kind of fast and efficient corn shuttle pedigree breeding process. By using American corn germ plasm 3163 as basic material and through four years of shuttle alternate planting in Sichuan Province in spring and summer and in Hainan Province in autumn and winter, excellent corn selfing line is bred. At the same time of selecting superior plants for selfing in Hainan Province, pollen and test variety parent 48-2 are test crossed; and via ecological comparison to select the excellent combination ZH002, regional test and production test for five years, outstanding corn hybrid Zhenghong-2 is bred. The shuttle breeding between the northern and the southern has fast breeding process and high selfing breeding efficiency.

Description

Technical field: [0001] The invention belongs to the technical field of corn heterosis utilization, and in particular relates to a fast and efficient shuttle pedigree breeding method for breeding corn inbred lines and hybrids. Background technique: [0002] Corn is an important three-component crop of grain, economics and feed in my country, which has great potential for increasing production and application prospects. At present, the effective method of utilizing heterosis in maize is to breed F 1 Strong dominant hybrids, that is, conventional maize breeding includes two steps: separation and selection of inbred lines and combination breeding of hybrids. However, it generally takes 6-8 years (generations) to obtain inbred lines that are homozygous or substantially homozygous for most favorable gene loci through self-segregation and selection; It usually takes 5-6 years to complete the process such as qualification, and enter the regional examination and approval procedure...

Claims

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Application Information

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IPC IPC(8): A01H1/02A01H1/04
Inventor 柯永培袁继超肖小余石海春余学杰赖仲铭杨志荣孙群
Owner SICHUAN AGRI UNIV
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