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中国农学通报 ›› 2020, Vol. 36 ›› Issue (26): 147-152.doi: 10.11924/j.issn.1000-6850.casb20191000741

• 水产·渔业 • 上一篇    下一篇

6个不同群体鳜基于SSR的遗传多样性初步研究

周梦晨1,2(), 徐东坡1, 方弟安1, 周彦锋1, 刘凯1, 张敏莹1()   

  1. 1农业农村部长江下游渔业资源环境科学观测实验站,中国水产科学研究院淡水渔业研究中心,江苏无锡 214081
    2南京农业大学渔业学院,江苏无锡 214081
  • 收稿日期:2019-10-21 修回日期:2019-12-27 出版日期:2020-09-15 发布日期:2020-09-14
  • 通讯作者: 张敏莹
  • 作者简介:周梦晨,女,1995年出生,江苏苏州人,学士,研究方向:渔业资源及种质保护。通信地址:214128 江苏省无锡市滨湖区雪浪街道薛家里69号,E-mail:429627282@qq.com
  • 基金资助:
    国家科技基础条件平台建设运行项目“长江下游水产种质资源标准化整理、整合与共享”(2019DKA30470-003);江苏省水生生物资源重大专项(ZYHB16)

Genetic Diversity of Six Populations of Siniperca Chuatsi: Analysis Based on SSR

Zhou Mengchen1,2(), Xu Dongpo1, Fang Di’an1, Zhou Yanfeng1, Liu Kai1, Zhang Minying1()   

  1. 1Scientific Observing and Experimental Station of Fishery Resources and Environment in the Lower Reaches of the Yangtze River, Ministry of Agriculture and Rural Affairs Freshwater Fisheries Research Center, CAFS, Wuxi Jiangsu 214081
    2College of Fisheries, Nanjing Agricultural University, Wuxi Jiangsu 214081
  • Received:2019-10-21 Revised:2019-12-27 Online:2020-09-15 Published:2020-09-14
  • Contact: Zhang Minying

摘要:

旨在了解不同群体鳜遗传多样性及种质资源现状,采用微卫星标记技术,对采自6个不同群体鳜96尾个体的遗传多样性进行了初步分析。结果表明,经筛选的10对引物在6个鳜群体中的平均等位基因数(Na)为2.2000~2.5000,期望杂合度(He)为0.6489~0.7289,多态信息含量(PIC)为0.5614~0.6409 (PIC大鱼0.5);群体遗传分化系数(Fst)为0.0606(0.05小鱼Fst小鱼0.15),平均基因流(Nm)为4.0151;检验表明,除高邮和靖江群体外,其他4个群 体均不同程 度地偏 离Hardy-Weinberg平衡,主要表现为杂合子缺失。构建的UPGMA聚类图显示,铜陵、安庆、太湖、高邮和靖江群体聚为一类,当涂群体聚为另一类。本研究表明6个鳜群体的遗传多样性较高,群体间遗传分化水平中等,群体间存在着一定的基因交流。

关键词: 鳜, 不同群体, 微卫星标记, 遗传多样性

Abstract:

To study the genetic diversity and the status of germplasm resources in different populations of Siniperca chuatsi, based on microsatellite marking technology, preliminary analysis of genetic diversity was carried out in 96 individuals from 6 populations of Siniperca Chuatsi. The results showed that the average value of allele (Na) was from 2.2000 to 2.5000 by ten pairs selected microsatellite markers. The average expected heterozygosity (He) value was from 0.6489 to 0.7289, and the average polymorphic information content (PIC) was from 0.5614 to 0.6409 (PIC大鱼0.5). The genetic differentiation coefficient (Fst) among the populations was 0.0606 (0.05小鱼Fst小鱼0.15), and the gene flow (Nm) was 4.0151. The test indicated that other four populations deviated from Hardy-Weinberg Equilibrium in some extent except Gaoyou and Jingjiang population, which mainly showed heterozygote deficiency. The UPGMA clustering showed that dangtu population formed an independent cluster, and the other five populations were another cluster. The study indicates that the genetic diversity of the six populations of Siniperca chuatsi is relatively high, there are a medium genetic differentiation and some gene flow among the six populations.

Key words: Siniperca chuatsi, different populations, microsatellite marker, genetic diversity

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