Genomic affinities of Arachis genus and interspecific hybrids were revealed by SRAP markers

文献类型： 外文期刊

第一作者： Ren, Xiaoping

作者： Ren, Xiaoping;Huang, Jiaquan;Liao, Boshou;Zhang, Xiaojie;Jiang, Huifang

作者机构：

关键词： Arachis genus;Genomic affinities;Interspecific hybrids;SRAP

期刊名称：GENETIC RESOURCES AND CROP EVOLUTION （ 影响因子：1.524； 五年影响因子：1.713 ）

ISSN： 0925-9864

年卷期： 2010 年 57 卷 6 期

页码：

收录情况： SCI

摘要： The Arachis genus is native to South America, and contains 70-80 described species assembled into nine sections. A better understanding of the level of speciation and taxonomic relationships is a prerequisite to the effective use of Arachis species in peanut breeding programs. Forty-eight genotypes representing 19 species in 6 sections were evaluated to assay the genetic variability within and among species, and 10 recombinant lines and those parents were identified with introgression of Arachis species chromosome segments into A. hypogaea genome using SRAP markers. Sixty of sixty-four SRAP primers tested were selected for DNA amplification reactions. A dendrogram and principal component analysis were constructed based on 353 SRAP polymorphic bands of the accessions. The number of scored polymorphic bands per each primer combination varied from 1 to 25 with an average of 5.9 per reaction. Estimates of genetic distance among the 48 accessions Arachis species ranged from 0.11 to 0.76. A-genome accessions 475845 (A. duranensis), and 331197 (A. villosa) were most closely associated to A. hypogaea. The first two PCAs accounted for 77.74% (62.02 and 15.72%) of the total variation observed and separated the different genomic groups. SRAPs also identified introgression of Arachis species chromosome segments into A. hypogaea. genome with 10 recombinant lines and those parents. The present results indicated that SRAPs can be used to determine the genetic relationships among species of the different sections of the genus Arachis and to identify introgression of Arachis genus chromosome segments into A. hypogaea genome.

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