84个茶树品种遗传多样性及亲缘关系的SSR分析
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Genetic diversity and relationship of 84 tea cultivars(Camellia sinensis (L.) O. Kuntze) by SSR markers
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    摘要:

    利用33对多态性SSR引物对84个茶树品种进行亲缘关系和遗传多样性分析,并基于SSR数据,对供试品种进行UPGMA遗传相似性聚类分析。结果表明:参试品种具有较高的遗传多样性(共检测到94个等位位点,每个引物2~4个,平均2.85个;引物多态性信息含量为0.20~0.79,平均值为0.56;可观测等位位点数最多9个,最少3个,平均4.79个;杂合度观测值为0.08~0.97,平均值为0.53;杂合度期望值为0.14~0.86,平均值为0.62;群体内的Shannon指数平均值为1.17);聚类分析结果显示,阿萨姆茶等6个品种各自形成了单独的分支,其余78个品种聚成1个大类群,在相似系数0.54处,这个大类群又可分为6个亚类群。

    Abstract:

    Abstract:The 33 pairs of simple sequence repeats (SSR) primers were used to analyze the genetic polymorphism and genetic relationship of 84 tea cultivars. Totally 94 alleles were amplified using 33 SSR primers, the number of alleles per primer ranged from 2 to 4, averaged 2.85. The polymorphism information content (PIC) varied from 0.20 to 0.79, averaged 0.56. The observed heterozygosity (Ho) ranged from 0.08 to 0.97 and the expected heterozygosity varied from 0.14 to 0.86, averaged 0.53 and 0.62, respectively. The Shannon index of all accessions is 1.17. All of the results showed that the genetic polymorphism of all accessions were relatively abundant. The 84 accessions were classified into 6 groups based on the UPGMA method with the similarity coefficient at 0.54.

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王旭,董丽娟.84个茶树品种遗传多样性及亲缘关系的SSR分析[J].湖南农业大学学报:自然科学版,2011,37(3):260-266.

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  • 收稿日期:2010-12-31
  • 最后修改日期:2011-03-03
  • 录用日期:2011-05-04
  • 在线发布日期: 2011-06-05
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