广州木棉种质资源遗传多样性SSR分析
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摘要
本研究利用SSR标记对100个广州木棉单株进行木棉遗传多样性分析,目的是研究广州地区木棉在遗传多样性水平上的差异和分化情况。结果表明,从99对木棉SSR标记种筛选出11对具有多态性的引物,共检测出37个多态性位点,每对引物的等位变异为2~6个,平均为3.23个;木棉群体的Ne变化范围为1.0~3.1591,平均值为1.8954,居群间的Shannon信息指数(Ⅰ)为0.6868,Nei's基因多样性指数(He)为0.4175。根据UPGMA分析,基于遗传距离0.416处将100份材料分为5大类群,结果表明,广州木棉亲缘关系与采集地和表型无显著相关性。
To reveal difference and characteristics of Bombax ceiba in Guangzhou on the level of genetic diversity.SSR molecular markers technique were used to study genetic diversity of 100 single individual plants.The result showed that 37 alleles were detected using 11 polymorphic SSR primers among the 100 accessions.2 to 6 alleles were indentified among different loci and the average number of alleles per marker across genotypes was 3.23.Total Nei' s genetic diversity index varied greatly from 1.0to 3.1591,with an average of 1.8954.The Shannon' s information(I) and the average index of Nei' s genetic diversity(He)were 0.6868 and 0.4175 respectively.The 100 single individual plants were divided into 5 groups at the threshold of 0.416 based on genetic distance,showed that the genetic distance was no significantly difference with the geographic latitude and phenotype of Bombax ceiba.
引文
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