Li Weiwen, Chen Xinjun, Xu Qianghua, Zhu Jiangfeng, Dai Xiaojie, Xu Liuxiong
Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources, Ministry of Education, College of Marine Sciences, Shanghai Ocean University, 999 Huchenghuan Road, Lingang New Harbor, Shanghai, 201306, People's Republic of China.
Biochem Genet. 2015 Apr;53(1-3):8-22. doi: 10.1007/s10528-015-9666-0. Epub 2015 Apr 9.
Thunnus albacares is an important fishery species throughout the world. Polymorphisms of sequence variations in mtDNA COI genes were assessed to explore the genetic differentiations among 11 populations of T. albacares sampled from the central Pacific Ocean. Sixty-one mtDNA haplotypes and 38 variable sites were detected. Analysis of mtDNA COI sequences revealed that tuna from the 11 localities were characterized by moderately high haplotype diversity (h = 0.650 ± 0.040), while sequence divergence between haplotypes was relatively low (π = 0.00364 ± 0.00044). Analyses of molecular variance and FST analysis supported that significant genetic differentiations existed between some of the sampled populations. Tests of neutral evolution and mismatch distribution analysis suggested that T. albacares might have experienced a population expansion, which possibly occurred within the last 0.82 million years. Our study unraveled the genetic structure of the extant population of T. albacares and addressed the related fishery management issues including fishery stock identification and management.
黄鳍金枪鱼是一种在全球范围内具有重要商业价值的渔业资源。本研究通过分析线粒体细胞色素氧化酶亚基I（COI）基因序列的多态性，探讨了采自中太平洋的11个黄鳍金枪鱼群体的遗传分化情况。共检测到61个线粒体单倍型和38个可变位点。线粒体COI序列分析结果显示，11个群体的单倍型多样性较高（h = 0.650 ± 0.040），但单倍型间的序列差异相对较低（π = 0.00364 ± 0.00044）。分子方差分析和FST分析结果表明，部分群体间存在显著的遗传分化。中性检验和失配分布分析结果显示，黄鳍金枪鱼群体可能在过去82万年中经历了种群扩张。本研究揭示了黄鳍金枪鱼现存群体的遗传结构，并为渔业管理提供了科学依据，包括渔业资源的识别和管理。
