【摘要】 为了给中国西南地区小麦新品种选育以及杂种优势研究提供依据,采用微卫星分子标记(SSR)对2005~2006年西南地区参加国家小麦区试及预试的33个小麦品种(系)进行了遗传多样性分析,筛选出24对扩增谱带稳定的引物,共检测到126个等位基因变异,每对引物检测等位基因3~11个,平均5.25个。33个品种(系)之间的遗传相似系数为0.373~0.794,平均为0.597。品种间遗传相似系数变幅较大,表明西南麦区小麦品种(系)间存在着不同程度的遗传多样性差异。用UPGMA法可将33个品种(系)分为6个类群,聚类结果在一定程度上反映了它们之间的亲缘关系。更多还原

【Abstract】 In order to breed more varieties and develop the study of wheat heterosis utilizition in southwest wheat,the genetic diversity among 33 wheat cultivars(lines),which had been taken part in field experiment in the southwest of China during the period of 2005～2006,was investigated by SSR markers.A set of 24 pairs of SSR primers with stable amplified band patterns were screened and a total of 126 alleles were scored.3 to 11 alleles could be detected by each SSR primer with the average number of 5.25.The genetic similarity(GS) between two cultivars among the 33 wheat cultivars(lines) varied from 0.373 to 0.794 and the average was 0.597,indicating that the genetic diversity among these wheat cultivars in the study is abundant.The UPGMA analysis classified the 33 wheat cultivars(lines) into six clusters,which could reflect their genetic relationship in some degree.更多还原