Population Genetic Analysis of Sillago nigrofasciata (Perciformes:Sillaginidae) Along the Coast of China by Sequencing Mitochondrial DNA Control Region  

作　　者：ZHANG Xiaomeng GAO Tianxiang YE Yingying SONG Na YU Zhengsen LIU Yong 

机构地区：[1]Fisheries College,Ocean University of China,Qingdao 266003,China [2]Fisheries College,Zhejiang Ocean University,Zhoushan 316022,China [3]National Engineering Research Center for Marine Aquaculture,Zhejiang Ocean University,Zhoushan 316022,China [4]East China Sea Fisheries Research Institute,Chinese Academy of Fishery Sciences,Shanghai 200090,China

出　　处：《Journal of Ocean University of China》2020年第3期707-716,共10页中国海洋大学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (Nos.41976083 and 41776171)。

摘　　要：Sillago nigrofasciata, a small to moderate size nearshore species, is newly found along the eastern and southern coasts of China. The present study is carried out in order to analyze the population genetics of the S. nigrofasciata. The control region sequence of mitochondrial DNA revealing 73 haplotypes were obtained from 162 individuals collected at 8 locations along the coast of China. The whole S. nigrofasciata population along the coast of China showed a low nucleotide diversity(0.012) and a high population diversity(haplotype diversity)(0.943), and all the 8 local populations showed low nucleotide diversities(0.014 – 0.001), suggesting the protective measures are effective. The haplotypes of the 8 local populations were widely distributed in haplotype network diagram and neighbor-joining phylogenetic tree, while no branch associating with sampling locations was detected. Recent gene flow analysis showed asymmetric gene exchanges among local populations. The pairwise FST values and unweighted pair-group method with arithmetic mean(UPGMA) tree revealed a certain amount of genetic difference among local populations. Moreover, analysis of molecular variance(AMOVA) reflected genetic differences between hypothetical subdivision groups. Neutral test and mismatch distribution of pairwise nucleotide suggested S. nigrofasciata may have experienced recent population expansion events. The historical geographic events associating with ice age may be the main explanation to the heterogeneity among local populations with short geographic distances, and the homogeneity among local populations with long geographic distances.

关 键 词：Sillago nigrofasciata Sillago sp. population genetics mitochondrial DNA control region coast of China 

分 类 号：Q953[生物学—动物学]