梨形环棱螺6个地理种群遗传多样性与遗传分化分析

Analysis of Genetic Diversity and Genetic Differentiation of Six Geographical Populations of Bellamyapurificata

本研究旨在探究国内不同地理种群梨形环棱螺(Bellamya purificata)的遗传特征,以了解其遗传多样性和群体结构。选取了安徽芜湖(ASY)、江苏淮安(CX)、广西南海(GZT)、江苏江阴(JY)、江苏常州(RS)、广西柳州(ZZR)6个地区的梨形环棱螺样本进行比较研究。研究发现,这6个群体的遗传多样性均较高,单核苷酸多态性(π)为0.005976~0.007760。其中GZT群体和ASY群体的遗传多样性相对更高,而ZZR群体遗传多样性较低,RS群体与GZT种群之间存在较大的分离,ZZR群体与ASY种群之间分离较小,其余种群之间分离均不明显,说明梨形环棱螺种群虽然分布广,但不同地理种群之间的遗传分化不大。

The study aims to understand the genetic characteristics of Bellamya purificata populations in China.In this paper,six populations of B.purificata were selected from Wuhu of Anhui(ASY),Huai'an of Jiangsu(CX),Nanhai of Guangxi(GZT),Jiangyin of Jiangsu(JY),Changzhou of Jiangsu(RS)and Liuzhou of Guangxi(ZZR),and their genetic diversity,population structure and selection signals were compared.The results showed that the genetic diversity of these six populations was high,and the single nucleotide polymorphism(π)was 0.005976-0.007760.Among them,the genetic diversity of GZT population and ASY population was relatively higher,while the genetic diversity of ZZR population was lower.There was a large separation between RS population and GZT population,and the separation between ZZR population and ASY population was small.The separation between the remaining populations was not obvious.It shows that although the population of B.purificata is widely distributed,the genetic differentiation between different geographical populations is not large.