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Genetic Population Structure of Thunnus albacares in the Central Pacific Ocean Based on mtDNA COI Gene Sequences

机译:基于MTDNA COI基因序列的中央太平洋中丘斯氏菌的遗传人口结构

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摘要

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 (pi = 0.00364 +/- 0.00044). Analyses of molecular variance and F-ST 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.
机译:Thunnus Albacares是全球重要的渔业物种。评估了MTDNA COI基因序列变异的多态性,探讨了来自中原海洋中抽样的11种群体的遗传分歧。检测到六十一体MTDNA单倍型和38个可变部位。 MTDNA COI序列的分析表明,来自11个地方的金枪鱼的特征在于中度高单倍型多样性(H = 0.650 +/- 0.040),而单倍型之间的序列分歧相对较低(PI = 0.00364 +/- 0.00044)。分子方差和F-ST分析的分析支持在一些采样群体之间存在显着的遗传分化。中性演化和失配分析的试验表明,T. Albacares可能会经历了人口扩张,可能发生在持续的82万年内。我们的研究揭开了T. Albacares的现存群体的遗传结构,并解决了相关的渔业管理问题,包括渔业股票识别和管理。

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