Recurrent selection method for dominant germplasm population of hybrid wheat

A cyclical selection and hybrid wheat technology, applied in the field of wheat hybridization, can solve the problem that there are few studies on the improvement of hybrid wheat germplasm population with strong dominance.

Active Publication Date: 2018-01-12
XINJIANG ACADEMY OF AGRI & RECLAMATION SCI
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Problems solved by technology

However, there are very few studies on the application of recurrent selection me

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  • Recurrent selection method for dominant germplasm population of hybrid wheat

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Embodiment 1

[0024] This embodiment provides a method for recurrent selection of hybrid wheat dominant germplasm populations, such as figure 1 shown.

[0025] 1. Analysis of parental genetic differences and heterosis groups.

[0026]Select 20 parents with high combining ability and extensive sources after years of testing, including 15 maintainer lines (B) and 5 restorer lines (R) of the cytoplasmic sterile line CMS, and configure 10×10=100 diallex hybrids F 1 Combinations, of which 56 combinations are B×B combinations (crosses between maintainers, parents do not contain restorer genes), 44 combinations are R×B, B×R and R×R combinations (parents contain restorer genes), and parental SNP (Single Nucleotide Polymorphism) genetic differences and heterosis group clustering analysis, according to grouping information to provide pollination male parent for recurrent selection of two groups.

[0027] 2. Recurrent selection of half-sibs in the CMS male sterile line population (set up isolation a...

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Abstract

The invention relates to a recurrent selection method for a dominant germplasm population of hybrid wheat. The recurrent selection method comprises the following steps: respectively carrying out half-sibling ear line phenotype recurrent selection on a CMS sterile line population and an R restoring line population; carrying out clustering analysis of genetic difference and heterotic group on diallel cross F1 combinations and parents thereof, wherein the parents comprise maintainer lines and restoring lines of male sterile lines CMS of wheat cells; carrying out CMS line half-slib recurrent selection by taking CMS sterile lines as female parents and B lines as male parents, selecting excellent sterile lines subjected to recurrent selection, and carrying out double haploid induction to obtainmale sterile DH lines; carrying out R line half-slib recurrent selection by taking dominant genic sterile Tal ear lines as female parents and R lines as male parents, selecting excellent sterile plants subjected to recurrent selection, and carrying out the double haploid induction to obtain fertile DH lines with restoring genes; carrying out test cross on the sterile DH lines and the fertile DH lines, selecting heterosis crosses of the lines according to the test cross result, and cultivating wheat hybrid varieties.

Description

technical field [0001] The invention relates to a wheat hybridization method, in particular to a method for recurrent selection of dominant germplasm groups of hybrid wheat. Background technique [0002] Recurrent selection refers to the selection of excellent individuals from a certain crop population for periodic cross-crossing, self-crossing and identification to achieve gene optimization and recombination, thereby effectively increasing the frequency of good genes in the improved population while maintaining rich genetic variation in the new population The method for the next round of selection. Among them, periodic selective hybridization is conducive to breaking the linkage of good and bad genes, so that good genes can be fully recombined, self-crossing and selection can eliminate unfavorable genes from the population, and effectively increase the frequency of good genes. [0003] After the 1940s, recurrent selection became one of the earliest effective methods for ma...

Claims

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Application Information

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IPC IPC(8): A01H1/02A01H1/04
Inventor 田笑明聂迎彬桑伟孔德真徐红军穆培源韩新年崔凤娟刘鹏鹏
Owner XINJIANG ACADEMY OF AGRI & RECLAMATION SCI
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