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首页> 外文期刊>Marine ecology >The role of life-history traits, selective pressure and hydrographic boundaries in shaping the genetic structure of the transparent goby, Aphia minuta
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The role of life-history traits, selective pressure and hydrographic boundaries in shaping the genetic structure of the transparent goby, Aphia minuta

机译：生活史特征，选择性压力和水文边界在塑造透明虾虎鱼遗传结构中的作用

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摘要

The transparent goby (Aphia minuta) is a small progenetic goby that displays a short life cycle with early reproductive maturity and represents a valuable fishery resource harvested by artisanal fleets in most part of its distributional range. This study aimed to define the genetic variability in A.minuta at five sampling sites within the Mediterranean Sea and one in the Atlantic Ocean through the analysis of 11 nuclear microsatellite loci. The results revealed that several genetic diversity estimators (expected and observed heterozygosities, mean number of alleles and allelic richness) were lower in the Atlantic Ocean than in the Mediterranean Sea, suggesting the role of past or current demographic events in shaping this pattern. The genetic structure was investigated using both classical genetic differentiation descriptors and Bayesian approaches, and by defining the current and past migration rates. The results obtained revealed a pronounced genetic structure within the Mediterranean Sea and suggest a very low current migration rate. The pattern of historical migration suggests the possible role of hydrographic boundaries in shaping the genetic structure detected in this species. In addition, the identification of loci under selection suggests the possible implication of selective pressures that are acting on genes connected with the peculiar life cycle of this gobiid fish.
机译：透明虾虎鱼（Aphia minuta）是一种小型后代虾虎鱼，生命周期短，繁殖早，代表了手工船队在其大部分分布范围内收获的宝贵渔业资源。这项研究旨在通过分析11个核微卫星基因座来定义地中海中五个采样点和大西洋中一个采样点的米曲霉的遗传变异性。结果显示，大西洋的几个遗传多样性估计量（预期和观察到的杂合性，平均等位基因数量和等位基因丰富度）均比地中海低，这表明过去或当前的人口统计学事件在塑造这种模式中发挥了作用。使用经典遗传分化描述符和贝叶斯方法，并通过定义当前和过去的迁移率，研究了遗传结构。获得的结果揭示了地中海内部明显的遗传结构，表明当前的迁移率非常低。历史迁徙的模式表明，水文边界在塑造该物种检测到的遗传结构中可能发挥作用。此外，对选择位点的鉴定表明，选择性压力可能作用于与该戈壁鱼特殊生命周期有关的基因上。

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  • 来源
    《Marine ecology》 |2016年第3期|518-531|共14页
  • 作者

    Ruggeri Paolo; Splendiani Andrea; Giovannotti Massimo; Fioravanti Tatiana; Occhipinti Giulia; Nisi Cerioni Paola; Caputo Barucchi Vincenzo;

  • 作者单位

    Università Politecnica delle Marche Dipartimento di Scienze della Vita e dell'Ambiente Ancona Italy;

    Università Politecnica delle Marche Dipartimento di Scienze della Vita e dell'Ambiente Ancona Italy;

    Università Politecnica delle Marche Dipartimento di Scienze della Vita e dell'Ambiente Ancona Italy;

    Università Politecnica delle Marche Dipartimento di Scienze della Vita e dell'Ambiente Ancona Italy;

    Università Politecnica delle Marche Dipartimento di Scienze della Vita e dell'Ambiente Ancona Italy;

    Università Politecnica delle Marche Dipartimento di Scienze della Vita e dell'Ambiente Ancona Italy;

    Università Politecnica delle Marche Dipartimento di Scienze della Vita e dell'Ambiente Ancona Italy;

    Istituto di Scienze Marine Sezione Pesca Marittima Consiglio Nazionale delle Ricerche Ancona Italy;

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  • 正文语种 eng
  • 中图分类
  • 关键词

    Apoptosis; Bayesian clustering; gene flow; Gobiidae; Mediterranean Sea; microsatellite DNA; selection;

    机译：细胞凋亡;贝叶斯聚类;基因流;戈壁科;地中海;微卫星DNA;选择;

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