Population Genetic Structure of Nuchequula mannusella (Perciformes: Leiognathidae) Population in the Southern Coast of China Inferred from Complete Sequence of mtDNA Cytb Gene
Population Genetic Structure of Nuchequula mannusella (Perciformes: Leiognathidae) Population in the Southern Coast of China Inferred from Complete Sequence of mtDNA Cytb Gene
Bingbing Gao1, Na Song1, Zhonglu Li2, Tianxiang Gao3 and Liqin Liu3,*
ABSTRACT
Population genetics of marine fishes is vitally important in fishery management and conservation. The ponyfish species Nuchequula mannusella is a dominant species along southern coast of China with important economic and ecological value, and little of its population genetic structure has been known. We use mitochondrial DNA markers to investigate the genetic structure of the species along southern coast of China. The complete sequences of Cytochrome b (Cytb) gene of 163 individuals collected from 6 locations were obtained and used for genetic analysis. No insertion or deletion were found among 26 mutation loci and 27 haplotypes were detected. All six populations were characterized by low haplotype diversity (0.39–0.59) and low nucleotide diversity (0.00038–0.00073). The result of AMOVA and pairwise Fst values indicated weak or no genetic differentiation among different populations. Haplotype network and NJ phylogenetic trees revealed that there was no distinctly geographical distribution pattern among the haplotypes. Furthermore, the mismatch distribution of pairwise nucleotide and the negatively selective neutrality test suggested that N. mannusella might have experienced a recent population expansion about 29, 000 years ago. The population expansion and coastal currents may be responsible for the homogeneity among the six populations.
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August 2019
Vol. 51, Iss. 4, Pages 1203-1598
