| 摘要: |
| 基于线粒体控制区片段，对采自于台湾海峡的4个斑鰶（Konosirus punctatus）群体进行群体遗传学研究.结果显示：4个斑鰶群体均呈现出高的单倍型多样度和低的核苷酸多样度；邻接关系树结构简单，且单倍型网络图呈星形结构，二者均未检测到与地理群体相对应的谱系结构；AMOVA和群体间遗传分化指数Fst的计算结果显示斑鰶的遗传变异主要来自于群体内，群体间遗传分化微弱，无显著群体遗传结构；核苷酸不配对分布和中性检验结果均暗示斑鰶经历了近期的群体扩张事件，推测扩张时间大约在5.29×104 a前，属于更新世晚期.斑鰶幼体较长的浮游期和洋流的输送作用可能是造成该海域群体间具有较高遗传同质性的主要原因，进一步提示该海域的斑鰶可作为同一种质资源和保护单元进行评估、管理. |
| 关键词: 海洋生物学 斑鰶 遗传多样性 遗传结构 历史动态 台湾海峡 |
| DOI： |
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| 基金项目:福建省科技计划资助项目（2013N0005）；双边国际事务合作-开展海峡两岸合作与交流资助项目（HC160703） |
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| Population genetics of Konosirus punctatus in Taiwan Strait |
| LI Yuan,ZHANG Liyan,WANG Liangming,ZHANG Li,ZHANG Ran,LIN Longshan,GAO Tianxiang |
| (Third Institute of Oceanography， SOA， Xiamen 361005， China;Fujian Institute of Oceanography， Xiamen 361013， China;Fisheries College， Zhejiang Ocean University， Zhoushan 316022， China;Fujian Provincial Key Laboratory of Coast and Island Management Technology， Xiamen 361013， China;Fujian Provincial Key Laboratory for Coastal Ecology and Environmental Studies， Xiamen 361013， China) |
| Abstract: |
| Population genetics of Dotted gizzard shad （Konosirus punctatus） collected from Taiwan Strait and its adjacent waters were studied based on the mitochondrial DNA control region segments. High haplotype diversity and low nucleotide diversity were detected among 4 populations. Significant genealogical structure corresponding to sampling locations was found neither in neighbor-joining tree nor in minimum spanning network. Results of AMOVA and pair-wise Fst revealed no significant genetic differentiation and structure among 4 populations. Both mismatch distribution analysis and neutrality tests indicated that the fish had experienced a recent population expansion， and the expanding time might be nearly 52，900 years ago in the late Pleistocene. The fish has the genetic homogeneity among 4 populations， which was mostly caused by the long planktonic period and oceanographic currents in Taiwan Strait. It further suggests that Dotted gizzard shad in the related waters should be evaluated and managed as same germplasm resources and protection unit． |
| Key words: marine biology Konosirus punctatus genetic diversity genetic structure demographic history Taiwan Strait |
