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首页> 外文期刊>Aquatic Sciences >Mitochondrial DNA and microsatellites reveal significant divergence in the beachflea Orchestia montagui (Talitridae: Amphipoda)
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Mitochondrial DNA and microsatellites reveal significant divergence in the beachflea Orchestia montagui (Talitridae: Amphipoda)

机译：线粒体DNA和微卫星显示海滩跳蚤Orchestia montagui（Talitridae：Amphipoda）中存在显着差异。

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摘要

Talitrids are semiterrestrial crustacean amphi-pods inhabiting sandy and rocky beaches; they generally show limited active dispersal over long distances. In this study we assessed levels of population genetic structure and variability in the talitrid amphipod Orchestia montagui, a species strictly associated to stranded decaying heaps of the seagrass Posidonia oceanica. The study is based on six populations (153 individuals) and covers five basins of the Mediterranean Sea (Tyrrhenian, Ionian, Adriatic, Western and Eastern basins). Samples were screened for polymorphisms at a fragment of the mitochondrial DNA (mtDNA) coding for the cytochrome oxidase subunit I gene (COI; 571 base pairs) and at eight microsatellite loci. MtDNA revealed a relatively homogeneous haplogroup, which clustered together the populations from the Western, Tyrrhenian and Eastern basins, but not the populations from the Adriatic and Ionian ones; microsatellites detected two clusters, one including the Adriatic and Ionian populations, the second grouping all the others. We found a weak geographic pattern in the genetic structuring of the species, with a lack of isolation by distance at either class of markers. Results are discussed in terms of probability of passive dispersal over long distances through heaps of seagrass.
机译：Talitrids是居住在沙滩和岩石海滩上的半陆生甲壳纲两栖类；它们通常在长距离上显示出有限的活性扩散。在这项研究中，我们评估了滑坡两栖纲Orchestia montagui（一种严格与海草波塞冬草的搁浅的腐烂堆相关的物种）中种群遗传结构和变异性的水平。该研究基于六个种群（153个个体），涵盖了地中海的五个盆地（第勒尼安，爱奥尼亚，亚得里亚海，西部和东部盆地）。在编码细胞色素氧化酶亚基I基因（COI； 571个碱基对）的线粒体DNA（mtDNA）片段和八个微卫星基因座处筛选了多态性。 MtDNA揭示了一个相对均质的单倍群，它将来自西部，第勒尼安和东部盆地的种群聚集在一起，但没有聚集来自亚得里亚海和爱奥尼亚时期的种群。微卫星探测到两个星团，一个星团包括亚得里亚海和爱奥尼亚人，第二个星团将所有其他星团分组。我们发现该物种的遗传结构中的地理格局较弱，在任一类标记物上均缺乏距离隔离。根据通过海草堆进行长距离被动扩散的可能性来讨论结果。

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  • 来源
    《Aquatic Sciences》 |2012年第3期|p.587-596|共10页
  • 作者

    Laura Pavesi; Alan Deidun; Elvira De Matthaeis; Ralph Tiedemann; Valerio Ketmaier;

  • 作者单位

    Unit of Evolutionary Biology/Systematic Zoology, Institute of Biochemistry and Biology, University of Potsdam, 14476 Potsdam, Germany;

    IOI-MOC, University of Malta, MSD 2080 Msida, Malta, Italy;

    Department of Biology and Biotechnology "Charles Darwin", University of Rome "Sapienza", Viale dell' Universita 32, 00185 Rome, Italy;

    Unit of Evolutionary Biology/Systematic Zoology, Institute of Biochemistry and Biology, University of Potsdam, 14476 Potsdam, Germany;

    Unit of Evolutionary Biology/Systematic Zoology, Institute of Biochemistry and Biology, University of Potsdam, 14476 Potsdam, Germany,Department of Biology and Biotechnology "Charles Darwin", University of Rome "Sapienza", Viale dell' Universita 32, 00185 Rome, Italy;

  • 收录信息 美国《科学引文索引》(SCI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    orchestia montagui; mtDNA; microsatellites; mediterranean sea; spatial genetic variation;

    机译：蒙塔克线粒体微卫星;地中海空间遗传变异;

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