【摘要】 利用ISSR分子标记技术对慈溪、乍浦、连云港3个彩虹明樱蛤地理群体的遗传差异进行了研究。试验结果表明,乍浦、慈溪、连云港3个彩虹明樱蛤群体的遗传多样性指数分别为0.3987、0.3670、0.4084,以连云港群体遗传多样性较高,慈溪群体最低。群体遗传结构显示,大多数(94.75%)的遗传多样性是由群体内不同个体间的差异造成的,只有小部分(5.25%)的遗传多样性与群体间的遗传分化有关。Nei’s遗传多样性分析结果表明,群体结构水平较低而基因流水平较高(Gst=0.0525;Nm=9.0295),提示彩虹明樱蛤群体间可能发生过较强的基因交流。更多还原

【Abstract】 The genetic diversity of clam Moerella iridescens collected from Lianyungang(Haizhou bay),Cixi and Zhapu(Hangzhou bay)was studied using ISSR(Inter Simple Sequence Repeats)molecular technology.In Shannon index,there was the genetic diversity of 0.3987 for the Zapu population,0.3670 for the Cixi population and 0.4084 for the Lianyungang population.Population structure analysis showed that the most genetic variation was derived from the intra-populations(94.75%),and very few from the inter-populations(5.25%).Analysis of Nei’s genetic diversity showed that there was a low level of population genetic structure with a considerable frequency of gene flow(Gst =0.0525;Nm = 9.0295).This result cues that a strong gene exchange might have occurred among the populations.更多还原