Genetic analysis of whole mitochondrial genome of Lateolabrax maculatus (Perciformes: Moronidae) indicates the presence of two populations along the Chinese coast

By

Gong, Jie
Chen, Baohua
Li, Bijun
Zhou, Zhixiong
Shi, Yue
Ke, Qiaozhen
Zhang, Dianchang
Xu, Peng

Type

Article

Date of Publication

2020-8-25

Original Publication

Zoologia

Volume

37

Pages

1--12

Subjects

Adaptation , genetic differentiation , Selection

Contributed by

Pensoft Publishers

Language

English

Published by

Curitiba, PR, Brasil Sociedade Brasileira de Zoologia [2009]-

Identifiers

DOI: https://doi.org/10.3897/zoologia.37.e49046

 

Abstract

The whole mitochondrial genome ofLateolabrax maculatus(Cuvier, 1828) was used to investigate the reasons for the observed patterns of genetic differentiation among 12 populations in northern and southern China. The haplotype diversity and nucleotide diversity ofL. maculatuswere 0.998 and 0.00169, respectively. Pairwise FSTvalues between populations ranged from 0.001 to 0.429, correlating positively with geographic distance. Genetic structure analysis and haplotype network analysis indicated that these populations were split into two groups, in agreement with geographic segregation and environment. Tajima’s D values, Fu’s Fs tests and Bayesian skyline plot (BSP) indicated that a demographic expansion event may have occurred in the history ofL. maculatus. Through selection pressure analysis, we found evidence of significant negative selection at the ATP6, ND3, Cytb, COX3, COX2 and COX1 genes. In our hypotheses, this study implied that demographic events and selection of local environmental conditions, including temperature, are responsible for population divergence. These findings are a step forward toward the understanding of the genetic basis of differentiation and adaptation, as well as conservation ofL. maculatus.