Genetic diversity and population structure of threeline grunt Parapristipoma trilineatum (Perciformes: Haemulidae) in China and Japan based on mtDNA control region

Abstract

Parapristipoma trilineatum is an edible and economically important marine fish with high farming potential; however, this fish has not been widely investigated. To understand the germplasm resources of this marine fish, we investigated the range of P. trilineatum from Maizuru, Japan, to Hainan, China. Using the mitochondrial control region as a molecular marker, we analyzed the population structure, genetic diversity, and population history dynamics of P. trilineatum. The control region exhibited high haplotype diversity and nucleotide diversity of 0.996 and 0.016, respectively. The genetic differentiation coefficients indicated low differentiation between Japanese and other populations. Additionally, based on the results of SAMOVA, AMOVA, and genetic differentiation coefficients, P. trilineatum can be divided into two management units in fishery resources management: China and Japan. Populations with high genetic diversity are useful as genetic breeding materials. This study provides a basis for the selection and breeding of P. trilineatum.

Keywords

• Mitochondrial DNA
• Conservation
• Genetic differentiation
• Population expansion
• Marine fisheries