同域分布两种鲤科鱼类种群遗传结构的比较  

Comparison of population genetic structure of two co-distributed cyprinid species

作　　者：程清清[1] 顾钱洪[1] 方冬冬[1] 李学军[1] 周传江[1] 孟晓林[1] 聂国兴[1] 

机构地区：[1]河南师范大学水产学院河南省水产动物养殖工程技术研究中心,河南新乡453007

出　　处：《水产学报》2017年第8期1169-1182,共14页Journal of Fisheries of China

基　　金：国家自然科学基金(31601851);河南省重点科技攻关项目(142102110144;142102110057;122102110049;122102310357);河南省高校科技创新团队支持计划(14IRTSTHN013)~~

摘　　要：为了解河南省境内黄河水系和卫河水系棒花鱼和条的鱼类遗传多样性现状,利用线粒体细胞色素b(cytb)基因,对这两种鱼类开展群体遗传学研究。结果显示,棒花鱼和条群体多态性较低;系统发育树和单倍型网络图结果显示棒花鱼和条均由3个线粒体谱系组成;棒花鱼和条种群间均存在明显的遗传分化,种群间中等偏低的基因流解释了两种鱼类均具有较低的遗传多样性和明显的种群分化;群体历史动态分析显示,棒花鱼和条种群数量分别在距今约0.019百万年和0.026百万年开始锐减。鉴于群体多态性,种群分化和群体历史动态研究,这两种鱼类的遗传多样性均较低,需加强对其资源保护。In order to estimate and compare the genetic diversity and population structure between Abbottina rivularis and Hemiculter leucisculus in the Yellow River and Weihe River in Henan province, we used cytb sequences to estimate population genetic parameters and tested for demographic fluctuations. Our results showed that the population polymorphism of the two species was low. The results from phylogenetic tree, as well as haplotype network structure, showed that A. rivularis and H. leucisculus had three distinct lineages, however, there was no phylogeographic structure. The gene flow with moderate to low among populations explained that the two species had lower genetic diversity and distinct population differentiation. Then we analyzed the Demographic History of A. rivularis and H. leucisculus. Bayesian skyline plot revealed that the stock of the two species declined dramatically 0.019 and 0.026 million years ago, respectively. In view of the population polymorphism, population differentiation and demographic history, we concluded that the genetic diversity of A. rivularis and H. leucisculus was low in this study, and it was necessary to strengthen the protection of their resources.

关 键 词：棒花鱼 [歺又鱼]条 CYTB 种群遗传多样性 黄河水系 卫河水系 

分 类 号：Q347[生物学—遗传学] S917.4[农业科学—水产科学]