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
CN1232165CInactive Publication Date: 2005-12-21SICHUAN AGRI UNIV +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SICHUAN AGRI UNIV
Publication Date
2005-12-21
Estimated Expiration
Not applicable · inactive patent

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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.
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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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