Title: Genetic Variation Evaluation Among the S_2 of Synthetic Maize Populations by SSR Molecular Markers
Abstract: In this study, the genetic variation among the S2 of 2 synthesized maize populations were evaluated based on the data of SSRs. On the 40 SSR loci, a total of 420 alleles were detected in the S2 of 2 populations. At each locus, 3 to 25 alleles could be detected, with an average of 10.5. The indexes including polymorphic site number, ratio of polymorphic sites, genotype number and mean gene heterozygosity in the S2 of GP-5 were all higher, so there was more genetic variation in the S2 of GP-5. The mean genetic distance between the S2 of GP-4 and GP-5 was higher than that among the 20 strains, and the latter was much higher than that among different individuals in the same strain. The S2 of 2 populations were classified into 5 groups and 10 subgroups according to genetic distance, some strains from the S2 of GP-4 and GP-5 were classified into a same subgroups, it indicated that these strains may have the same genetic backgrounds. It was necessary both to do field identification and SSR detection when selecting materials to synthesize maize population, and the number of materials was according to the breeding aim. When selecting lines from populations, strains selecting must be emphasized particularly.
Publication Year: 2007
Publication Date: 2007-01-01
Language: en
Type: article
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