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

Abstract

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.

Journal

Journal ID (publisher-id): JOUC

Title: Journal of Ocean University of China

Publisher: Science Press and Springer (China )

ISSN (Electronic): 1672-5182

Publication date (Electronic): 06 July 2019

Publication date (Print): 01 October 2019

Volume: 18

Issue: 4

Pages: 947-952

Affiliations

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

Article

Publisher ID: s11802-019-3991-6

DOI: 10.1007/s11802-019-3991-6

Copyright statement: Copyright © Ocean University of China, Science Press and Springer-Verlag GmbH Germany 2019.

License:

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Product

Self URI (journal-page): https://www.springer.com/journal/11802