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茶叶科学 ›› 2012, Vol. 32 ›› Issue (2): 135-141.doi: 10.13305/j.cnki.jts.2012.02.013

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江华苦茶种质资源遗传多样性和亲缘关系的ISSR分析

李丹1, 李端生2, 杨春1, 王庆1, 罗军武1*   

  1. 1. 湖南农业大学教育部茶学重点实验室,湖南 长沙 410128;
    2. 湖南省江华瑶族自治县农业局,湖南 江华瑶族自治县 425509
  • 收稿日期:2011-07-19 修回日期:2012-01-18 出版日期:2012-04-15 发布日期:2019-09-05
  • 通讯作者: luojunwu11@sina.com
  • 作者简介:李丹(1987— ),女,陕西宝鸡人,硕士研究生,主要从事茶树栽培及分子生物育种研究。
  • 基金资助:
    湖南省研究生科研创新项目(CX2010B278)

Genetic Diversity and Relationship of Tea Germplasm Resources Camellia sinensis var. assamica cv. Jianghua Revealed by ISSR Markers

LI Dan1, LI Duan-sheng2, YANG Chun1, WANG Qing1, LUO Jun-wu1*   

  1. 1. Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha 410128, China;
    2. Agriculture Bureau of Jianghua Yao Autonomous County Hunan Province, Jianghua Yao Autonomous County 425509, China
  • Received:2011-07-19 Revised:2012-01-18 Online:2012-04-15 Published:2019-09-05

摘要: 利用ISSR标记分析了江华苦茶群体的遗传多样性和亲缘关系。10个多态性高、重复性好的ISSR引物在70个单株间共扩增出174条谱带,其中166条具有多态性,占95.40%,表明江华苦茶群体基因组DNA具有较高的多态性。供试单株间的平均Nei´s基因多态性(H)和Shannon信息指数(I)分别为0.382、0.558,表明材料间的遗传多样性较高。供试材料的相似系数介于0.44~0.84,平均为0.63。用UPGMA法进行聚类分析,共聚为6个类群,其中5个复合组,1个独立组。亲缘关系ISSR树状图在分子水平上显示了江华苦茶群体各单株间的亲缘关系,为江华苦茶种质资源的开发利用和保护提供了一定的参考依据。

关键词: 江华苦茶, ISSR, 遗传多样性, 亲缘关系

Abstract: The 10 pairs of ISSR primers were used to analyze the genetic polymorphism and genetic relationship of 70 Camellia sinensis var. assamica cv. Jianghua individuals. Totally 174 bands were generated with 10 ISSR primers, of which 166 (95.40%) were polymorphic, which indicated that the genetic diversity of Jianghua population was relatively high. The mean Nei´s gene diversity (H) and Shannon´s information index (I) of the tested tea germplasm were 0.382 and 0.558 respectively, indicating a rather high genetic diversity existed between the germplasm resources. The genetic similarity coefficient ranged from 0.44 to 0.84, averaging 0.63. UPGMA cluster analysis showed that all the tested individuals could be classified into 6 groups including 5 complex groups and 1 simple group. The genetic relationship of all 70 Jianghua individuals was revealed by the ISSR dendrogram, which provide the basis for the utilization and protection of this local landrace population.

Key words: Camellia sinensis var. assamica cv. Jianghua, ISSR, genetic polymorphism, genetic relationship

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