生物技术通报 ›› 2014, Vol. 0 ›› Issue (9): 208-212.

• 研究报告 • 上一篇    

中国沿海瘤背石磺不同地理群体遗传多样性的ISSR标记研究

王成暖,沈和定,郑培   

  1. 上海海洋大学水产与生命学院,上海 201306
  • 收稿日期:2014-03-11 出版日期:2014-09-15 发布日期:2014-09-07
  • 作者简介:王成暖,女,硕士研究生,研究方向:海洋生物学;E-mail:wangchengnuan@163.com
  • 基金资助:
    国家自然科学基金项目(30972259,41276157)

Evaluation of Genetic Diversity in the Onchidium struma from Different Geographical Populations in China by Inter Simple Sequence Repeat(ISSR)

Wang Chengnuan, Shen Heding, Zheng Pei   

  1. College of Fisheries and Life Sciences,Shanghai Ocean University,Shanghai 201306
  • Received:2014-03-11 Published:2014-09-15 Online:2014-09-07

摘要: 研究以盐城(YC)、上海(SH)、温州(WZ)、厦门(XM)、深圳(SZ)、海南(HN)6个不同地理群体的瘤背石磺为试验材料,利用ISSR分子标记进行了遗传多样性研究。结果表明,6个地理群体的多态位点百分率在54.20%-70.99%之间,Nei’s基因多样性指数和Shannon’s信息指数分别在0.1564-0.2191和0.2421-0.3324之间。AMOVA分子变异分析表明,瘤背石磺47.25%的变异发生在群体间,52.75%的变异发生在群体内,居群内的遗传变异大于居群间的遗传变异。平均Fst值为0.4725,种间分化系数(Gst)为0.3705,基因流(Nm)为0.8497,表明6个地理群体间已经发生了较大程度的遗传分化,其中推断遗传漂变可能是影响群体分化的主要因素之一。

关键词: 瘤背石磺, 地理群体, ISSR, 遗传多样性, 遗传分化

Abstract: The genetic diversity of Onchidium struma collected from Yancheng(YC), Shanghai(SH), Wenzhou(WZ), Xiamen(XM), Shenzhen(SZ), Hainan(HN)in China, was studied using the inter simple sequence repeat(ISRR)technique. The results indicated that the values of percentage of polymorphic band, Nei’s gene diversity and Shannon’s information index were 54.20%-70.99%, 0.1564-0.2191 and 0.2421-0.3324. According to AMOVA analysis, there were significant(P < 0.001)genetic differences among the six populations, 47.25%was attributed to among populations and the rest(52.75%)to differences within populations. The pairwise Fst =0.4725, gene differentiation coefficient(GST=0.3705)among populations and gene flow(Nm=0.8497)indicated that greater genetic differentiation occurred among the populations. Genetic drift was one of the main factors that affecting the population differentiation.

Key words: Onchidium struma , Geographical population , ISSR, Genetic diversity, Genetic differentiation