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Genetic variation and evolutionary demography of Fenneropenaeus chinensis populations, as revealed by the analysis of mitochondrial control region sequences

机译：Genetic variation and evolutionary demography of Fenneropenaeus chinensis populations, as revealed by the analysis of mitochondrial control region sequences

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摘要

Genetic variation and evolutionary demography of the shrimp Fenneropenaeus chinensis were investigated using sequence data of the complete mitochondrial control region (CR). Fragments of 993 bp of the CR were sequenced for 93 individuals from five localities over most of the species' range in the Yellow Sea and the Bohai Sea. There were 84 variable sites defining 68 haplotypes. Haplotype diversity levels were very high (0.95 +/- 0.03-0.99 +/- 0.02) in F. chinensis populations, whereas those of nucleotide diversity were moderate to low (0.66 perpendicular to 0.36%-0.84 perpendicular to 0.46%). Analysis of molecular variance and conventional population statistics (F-ST) revealed no significant genetic structure throughout the range of F. chinensis. Mismatch distribution, estimates of population parameters and neutrality tests revealed that the significant fluctuations and shallow coalescence of mtDNA genealogies observed were coincident with estimated demographic parameters and neutrality tests, in implying important past-population size fluctuations or range expansion. Isolation with Migration (IM) coalescence results suggest that F. chinensis, distributed along the coasts of northern China and the Korean Peninsula (about 1000 km apart), diverged recently, the estimated time-split being 12,800 (7,400-18,600) years ago.
机译：利用完整的线粒体控制区（CR）的序列数据，研究了虾对虾（Fenneropenaeus chinensis）的遗传变异和进化人口统计学。对黄海和渤海大部分物种范围内五个地区的93个个体的993 bp CR片段进行了测序。有84个可变位点，定义了68个单倍型。在中华白桦种群中，单倍型多样性水平很高（0.95 +/- 0.03-0.99 +/- 0.02），而核苷酸多样性的单体水平则中等至低（0.66垂直于0.36％-0.84垂直于0.46％）。分子变异分析和常规种群统计数据（F-ST）分析表明，在整个中国镰刀菌范围内，没有明显的遗传结构。不匹配的分布，人口参数的估计和中性测试表明，观察到的mtDNA族谱的显着波动和浅聚结与估计的人口统计学参数和中性测试一致，这意味着重要的过去人口规模波动或范围扩展。通过迁移隔离（IM）合并结果表明，分布在中国北方和朝鲜半岛沿海地区（相距约1000公里）的中华梭子蟹最近散布，估计时间间隔为12,800年（7,400-18,600年前）。

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