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中国农学通报 ›› 2023, Vol. 39 ›› Issue (30): 54-60.doi: 10.11924/j.issn.1000-6850.casb2022-0862

• 林学·园艺·园林 • 上一篇    下一篇

基于SSR分子标记的41份茶树种质资源遗传多样性及亲缘关系分析

蔡一鸣1(), 蒋双丰1, 毛光志2, 李梦笛2, 刁海龙2, 吴鹏飞2, 李俊玲1   

  1. 1 信阳市农业科学院茶叶研究所,河南信阳 464000
    2 信阳师范学院生命科学学院,河南信阳 464000
  • 收稿日期:2022-10-23 修回日期:2023-01-15 出版日期:2023-10-19 发布日期:2023-10-19
  • 作者简介:

    蔡一鸣,女,1988年出生,河南信阳人,助理研究员,硕士,主要从事茶树种质资源、育种等方面研究。通信地址:464000 河南省信阳市浉河区民权南街20号 信阳市农业科学院,Tel:18837631303,E-mail:

  • 基金资助:
    国家现代农业产业技术体系建设专项“国家茶叶产业技术体系”(CARS-19)

41 Tea Germplasm Resources: Genetic Diversity and Relationship Analysis Based on SSR Molecular Markers

CAI Yiming1(), JIANG Shuangfeng1, MAO Guangzhi2, LI Mengdi2, DIAO Hailong2, WU Pengfei2, LI Junling1   

  1. 1 Tea Research Institute, Xinyang Academy of Agricultural Sciences, Xinyang, Henan 464000
    2 School of Life Sciences, Xinyang Normal University, Xinyang, Henan 464000
  • Received:2022-10-23 Revised:2023-01-15 Published-:2023-10-19 Online:2023-10-19

摘要:

为了对豫南茶树种质资源进行初步鉴定和评价,以豫南茶树种质资源圃内41份无性系品种为材料,利用SSR分子标记技术进行遗传多样性及亲缘关系分析。结果表明:从33对引物中筛选出26对扩增较好的引物,26对引物共扩增出102条谱带,平均每对引物扩增条带4条,最少为2条,最多为7条,检测的平均观测等位基因数2个,平均有效等位基因数1.8664个,平均Nei’s遗传多样性0.4626,平均Shannon信息指数0.6550,引物多态信息量最大值0.80,最小值0.23,平均值0.62。聚类分析结果显示,在相似系数为0.5处,将41份材料分为4大类群,地理来源和遗传背景相近的大都聚在一起,供试品种的遗传距离为0.08~1.87,说明资源圃内品种间遗传基础较宽。

关键词: 茶树, 豫南, 种质资源圃, 遗传多样性, 亲缘关系, SSR标记

Abstract:

In order to conduct preliminary identification and evaluation of tea tree germplasm resources in southern Henan, 41 clonal varieties from the tea germplasm resources garden in southern Henan were used as materials to analyze genetic diversity and relationships by SSR marker.The results showed that 26 pairs of primers with good amplification were screened from 33 pairs of primers. A total of 102 bands were amplified from 26 pairs of primers, the average number of bands amplified by each pair of primers was 4, the minimum number was 2, and the maximum number was 7. The average number of observed alleles was 2, the average number of effective alleles was 1.8664, the average Nei's genetic diversity was 0.4626, the average Shannon information index was 0.6550, the maximum value of polymorphic information of primers was 0.80, the minimum value was 0.23, and the average value was 0.62. The results of cluster analysis showed that 41 materials were divided into 4 groups at the similarity coefficient of 0.5. Most of the materials with similar geographical origin and genetic background were clustered together, and the genetic distance of the tested varieties was 0.08-1.87. This indicated that the genetic foundation among varieties in the resource garden was relatively broad.

Key words: tea, southern Henan, germplasm resources garden, genetic diversity, relationships, SSR marker