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

Abstract

The whole mitochondrial genome of Lateolabrax 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 of L. maculatus were 0.998 and 0.00169, respectively. Pairwise FST values 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 of L. 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 of L. maculatus.

Genome-wide evolutionary signatures of climate adaptation in spotted sea bass inhabiting different latitudinal regions

“…The pairwise fixation indexes between the ZJ and BB populations were much higher than those between the LS and BH populations, indicating that the Leizhou Peninsula and Hainan Island block gene flow more than the Shandong Peninsula. As isolated marginal populations, the genetic diversity (H ) of BB populations was conceivably much lower than that of other populations (Table S5 ), which was consistent with previous reports based on much fewer genetic markers (Gong et al, 2020;Zhao et al, 2018). L. maculatus is a euryhaline fish and is capable of living in a wide range of salinities.…”

Complete Mitochondrial Genome of the Eggplant Fruit and Shoot Borer, Leucinodes orbonalis Guenée (Lepidoptera: Crambidae), and Comparison with Other Pyraloid Moths

“…The conserved properties of animal mitogenomes, the advantage of using multigene datasets, and the continued ease of acquisition would provide a promising strategy for species identification and population genetics using whole mitogenomes [21]. Whole mitogenomes were successfully used to determine the population structure of the Chinese seabass (Lateolabrax maculatus) in China [22] and Mansonia mosquitoes in Brazil [23]. Here, we present a report on the fully annotated sequence of the EFSB mitochondrial genome from short Illumina sequencing reads and phylogenetic reconstruction of Pyraloidea using whole mitogenomes.…”