Significant genetic differentiation between the Yellow Sea and East China Sea populations of cocktail shrimp Trachypenaeus curvirostris revealed by the mitochondrial DNA COI gene

Publication date: April 2015 Source:Biochemical Systematics and Ecology, Volume 59 Author(s): Zhiqiang Han , Wenbin Zhu , Wei Zheng , Pengfei Li , Bonian Shui The cocktail shrimp Trachypenaeus curvirostris is an ecologically and economically important shrimp species in the Yellow Sea and East China Sea. However, there is no information about its population genetic structure. The population genetic structure and level of gene flow of T. curvirostris from the Yellow Sea and the East China Sea were studied with a 658-bp segment of mtDNA COI gene. In total, 85 individuals were collected from five locations and 13 haplotypes were obtained. The genetic variation of COI gene in five populations was moderate, giving an overall haplotype diversity of 0.6888 ± 0.0432 and nucleotide diversity of 0.0069 ± 0.0038. Conflicting to our expectation, significant genetic differentiation was detected in this species. The result revealed two genetically divergent lineages, displaying clear different geographical distributions in the studied area. The significant genetic differentiation between the Yellow Sea and East China Sea populations might be caused by the Yangtze River outflow. Mismatch distribution revealed that T. curvirostris had undergone population range expansion, possibly before 103,400–109,700 years ago in the last interglaciation, rejecting the sudden demographic expansion.

Source: Biochemical Systematics and Ecology - January 30, 2015 Category: Biochemistry Source Type: research