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茶叶科学 ›› 2015, Vol. 35 ›› Issue (4): 329-335.doi: 10.13305/j.cnki.jts.2015.04.004

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基于EST-SSR的祁门种群体遗传多样性和亲缘关系分析

李赛君, 雷雨, 段继华, 罗意, 黄飞毅, 董丽娟*   

  1. 湖南省茶叶研究所,国家茶树改良中心湖南分中心,湖南 长沙 410125
  • 收稿日期:2015-03-13 修回日期:2015-04-07 出版日期:2015-10-15 发布日期:2019-08-26
  • 通讯作者: *hnhjhlsj@126.com
  • 作者简介:李赛君,女,本科,副研究员,主要从事茶树种质资源与遗传育种研究。
  • 基金资助:
    湖南省科技厅重大科技专项资金资助(2014FJ1006)

Analysis of Genetic Diversity and Relationship of Qimen Population of Tea Plants Based on EST-SSR Markers

LI Saijun, LEI Yu, DUAN Jihua, LUO Yi, HUANG Feiyi, DONG Lijuan*   

  1. Hunan Tea Research Institute, Hunan Branch of National Center for Tea Improvement, Changsha 410125, China
  • Received:2015-03-13 Revised:2015-04-07 Online:2015-10-15 Published:2019-08-26

摘要: 利用24对EST-SSR引物对祁门种群体66个单株和安徽1号进行遗传多样性和亲缘关系分析。结果表明:祁门种群体具有相对较高的遗传多样性,24对引物共检测到等位位点69个,平均2.88个;引物多态性含量PIC为0.18~0.85,平均值为0.47;杂合度观测值(Ho)在0.09~0.96之间,平均值为0.41;杂合度期望值(He)在0.23~0.76之间,平均值为0.50;群体内的Shannon指数I为0.39~1.50,平均0.89。根据相似系数矩阵按UPGMA法进行聚类,在相似系数平均值0.50处可将参试的67份材料划分为六大类,其中第Ⅰ类含有44个祁门种群体单株及安徽1号,占总数的67.16%,是祁门种的核心类群。

关键词: 祁门种群体, EST-SSR, 遗传多样性, 亲缘关系

Abstract: The 24 pairs of EST-SSR primers were used to analyze the genetic polymorphism and genetic relationship of 66 Qimen plants and ‘Anhui 1’. It was showed that the level of genetic diversity within Qimen population was high, with 69 alleles amplified by the 24 EST-SSR primers averaged 2.88. The polymorphism information content (PIC) was ranged from 0.18 to 0.85, with a mean 0.47. The observed heterozygosity (Ho) varied from 0.09 to 0.96, and the expected heterozygosity (He) varied from 0.23 to 0.76, with average of 0.41 and 0.50, respectively. The Shannon index of the Qimen plant population ranged from 0.39 to 1.50, with an average of 0.89. The 66 Qimen plant individuals and cultivar ‘Anhui 1’ were classified into 6 groups based on the UPGMA method with the similarity coefficient at 0.50, and the group I contained 44 Qimen individuals and ‘Anhui 1’, accounted for the 67.16% of the total, which is considered to be core group of the Qimen population.

Key words: Qimen population, EST-SSR, genetic polymorphism, genetic relationship

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