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首页> 外文期刊>Marine biology >Cryptic species and genetic connectivity among populations of the coral Pocillopora damicornis (Scleractinia) in the tropical southwestern Pacific
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Cryptic species and genetic connectivity among populations of the coral Pocillopora damicornis (Scleractinia) in the tropical southwestern Pacific

机译：热带西南太平洋珊瑚吡吡普拉群（Scleractinia）群群中的神秘物种和遗传连通性

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摘要

Studying population genetic connectivity (i.e., identifying gene flow among populations and understanding their impacts on the genetic structure and diversity of populations) is first a matter of knowing what we work on, that is, accurately delimiting evolutionary units. Here, we focused on Pocillopora damicornis sensu stricto (or Pocillopora PSH04 sensu Gelin et al. in Mol Phylogenet Evol 109:430-446. http://dx.doi.org/10.1016/j.ympev.2017.01.018, 2017). From 458 colonies sampled within the tropical southwestern Pacific [Chesterfield Islands and New Caledonia (Grande Terre and Loyalty Islands)], Bayesian assignments and network analyses were conducted with 11-microsatellite loci to first evaluate the genetic partitioning of the colonies in distinct Secondary Species Hypotheses (SSHs), then in distinct clusters. Population genetic connectivity was then assessed for each cluster separately. Pocillopora PSH04 was partitioned into two highly differentiated SSHs (SSH04a and SSH04b), regularly found in sympatry. Furthermore, SSH04a was subdivided into two clusters (SSH04a-1 and SSH04a-2). This pattern of genetic structuring seems not related to clonality, but rather to the establishment of reproductive barriers. Nevertheless, considering each cluster separately, the populations appeared highly differentiated, suggesting relatively weak gene flow. This low connectivity among populations, coupled with the existence of cryptic species, brings new insights to the connectivity pattern of this understudied Pacific region.
机译：研究人口遗传连通性（即，鉴定人口中的基因流动并理解其对遗传结构和人口的多样性的影响）首先是了解我们的工作原理，即准确地分隔进化单位。在这里，我们专注于Pocillopora Damicornis Sensuto（或Pocillopora PSH04 Sensu Gelin等人。在Mol Phylogenet Evol 109：430-446中。http://dx.do.org/10.1016/j.ympev.2017.01.018，2017） 。从热带西南太平洋（Chesterfield Islands和New Caledonia（Grande Terre和Loyalty Islands）中抽出的458个殖民地，贝叶斯分配和网络分析是用11微卫星基因座进行的，以便首先评估不同的中学物种假设中菌落的遗传分区（SSH），然后在不同的集群中。然后分别对每个聚类评估人口遗传连接。 Pocillopora PSH04被分成两个高度分化的SSH（SSH04A和SSH04B），定期在Sympatry中找到。此外，SSH04a被细分为两个簇（SSH04A-1和SSH04A-2）。这种遗传结构模式似乎与克隆性无关，而是建立生殖障碍。然而，考虑每个聚类，群体出现高度分化，表明基因流量相对较弱。群体之间的低连接性与隐藏物种的存在相结合，对该被认为的太平洋地区的连通模式带来了新的见解。

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    《Marine biology》 |2020年第10期|142.1-142.15|共15页
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    Oury Nicolas; Gelin Pauline; Magalon Helene;

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    Univ La Reunion Univ Nouvelle Caledonie CNRS UMR ENTROPIE IRD IFREMER St Denis La Reunion France|Lab Cogitamus Paris France;

    Univ La Reunion Univ Nouvelle Caledonie CNRS UMR ENTROPIE IRD IFREMER St Denis La Reunion France|Lab Excellence CORAIL Perpignan France;

    Univ La Reunion Univ Nouvelle Caledonie CNRS UMR ENTROPIE IRD IFREMER St Denis La Reunion France|Lab Cogitamus Paris France|Lab Excellence CORAIL Perpignan France;

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