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      Shallow Genetic Structure of Pholis fangi in Bohai Sea and Yellow Sea Inferred from mtDNA Control Region

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          Pholis fangi is an ecologically important fish species inhabiting Chinese coastal waters of Yellow Sea and Bohai Sea. To investigate the genetic diversity and population genetic structure of P. fangi, a fragment of 487 bp in the first hypervariable region (HVR-1) of the mitochondrial DNA (mtDNA) control region was sequenced for 181 individuals collected from Bohai Sea and Yellow Sea. A total of 18 polymorphic sites were detected, which defined 25 haplotypes. A moderate level of haplotype diversity ( h = 0.7052) and a low level of nucleotide diversity ( π = 0.0028) were detected. Both the phylogenetic tree and the haplotype network showed no significant genealogical structure difference among sampling locations. Pairwise F ST comparison and hierarchical molecular variance analysis (AMOVA) revealed that no significant genetic structure difference existed throughout the investigated regions, suggesting a high gene exchange among different populations. The results of neutrality test and mismatch distribution analysis indicated that a late Pleistocene population expansion (38000–127000 years ago) happened. Seasonal schooling migration may contribute to the genetically homogeneous population structure of the species.

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          Author and article information

          Journal of Ocean University of China
          Science Press and Springer (China )
          06 July 2019
          01 October 2019
          : 18
          : 4
          : 947-952
          1Fishery College, Zhejiang Ocean University, Zhoushan 316022, China
          2Key Laboratory for Technology Research on Sustainable Utilization of Marine Fishery Resources, Zhoushan 316022, China
          3Marine Science and Engineering College, Qingdao Agricultural University, Qingdao 266109, China
          4The Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao 266003, China
          5Oceans and Fisheries Bureau of Dongying District, Dongying 257091, China
          Author notes
          *Corresponding author: SONG Na
          Copyright © Ocean University of China, Science Press and Springer-Verlag GmbH Germany 2019.

          The copyright to this article, including any graphic elements therein (e.g. illustrations, charts, moving images), is hereby assigned for good and valuable consideration to the editorial office of Journal of Ocean University of China, Science Press and Springer effective if and when the article is accepted for publication and to the extent assignable if assignability is restricted for by applicable law or regulations (e.g. for U.S. government or crown employees).

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