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Fast and efficient corn shuttle pedigree breeding process

A corn, high-efficiency technology, applied in the fields of botanical equipment and methods, plant genetic improvement, application, etc., can solve the problems of not meeting the needs of corn variety replacement, affecting the production and development of corn, and long breeding cycle, reducing planting scale, The effect of improving breeding efficiency and speeding up the generation process

Inactive Publication Date: 2005-12-21
SICHUAN AGRI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its breeding cycle is long and its efficiency is low, so it cannot meet the needs of maize variety replacement, which affects the further development of maize production

Method used

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  • Fast and efficient corn shuttle pedigree breeding process
  • Fast and efficient 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 plants of the American Corn Belt germplasm 3163 basic material according to the requirements of 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 re...

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Abstract

The invention discloses a fast and efficient shuttle pedigree breeding method for breeding corn inbred lines and hybrids. The American corn belt germplasm 3163 is used as the basic material to pass through Sichuan spring and summer (northern season) and Hainan autumn and winter (southern season). Off-season) Shuttle alternate planting, the excellent maize inbred line K236 was bred in 4 years, and the excellent corn inbred line K236 was bred in Hainan. At the same time, the pollen was used to test cross with the test parent 48-2, and the excellent combination ZH002 was selected through the multi-ecological variety comparison test. , participated in the regional test and production test, and bred the corn hybrid Zhenghong No. 2 (48-2×K236) after 5 years. The present invention greatly accelerated the generation process of inbred line selection and improved the hybridization process through the north-south shuttle pedigree breeding. Generally, it only takes 3 to 4 years to breed a stable inbred line, and 5 years (S 1 Matching) or 6 years (also S 3 Matching) can be used to breed hybrids, so as to achieve the purpose of fast and efficient breeding.

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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Patent Type & Authority Patents(China)
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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