数字农科院2.0

Microsatellite Analysis of Homozygosity Progression of Heterozygous Genotypes Segregating in the Rice Subspecies Cross Pei'ai64s/Nipponbare

文献类型： 外文期刊

作者： Yong-shu Liang ; Qi-jun Zhang ; Shi-quan Wang ; Li-yong Cao ; Zhi-Qiang Gao ; Ping Li *; Shi-hua Cheng *

作者机构：

关键词： Rice (Oryza sativa L.);Subspecies cross;Microsatellite (SSR);Heterozygous genotype;Homozygosity progression

期刊名称： Biochemical Genetics

ISSN： 0006-2928

年卷期： 2011 年 49 卷 9-10 期

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收录情况： JCR（2021版）

摘要： Progression to homozygosity of heterozygous genotypes was studied in a cross of the rice subspecies Pei'ai64s and Nipponbare, using a set of 157 polymorphic microsatellite (SSR) markers. The segregation of heterozygous genotypes ranged from 49.13% in the F(2) population to 4.52% in the F(6) population (progression value 11.15%). The heterozygous genotypes were widely distributed in 180 F(2) plants, 330 F(6) lines, and 157 SSR markers. Homozygosity progression showed a wide distribution in plants and SSR markers but not in chromosomes. The segregation of heterozygous genotypes was not significant between populations but varied greatly in F(2) plants, F(6) lines, and SSR markers. The correlation between the progression to homozygosity and the heterozygosity of SSR markers was significant at the chromosome level. The segregation of heterozygous genotypes in plants, SSR markers, and chromosomes was not completely in accordance with Mendel's law. This information will help rice geneticists and breeders to understand heterozygous genotype segregation at the DNA level and to screen special markers for breeding.

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