Implications of barrier ephemerality in geogenomic research
Implications of barrier ephemerality in geogenomic research
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屏障短暂性在地球基因组研究中的意义
DOI：
10.1111/jbi.14487
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发表时间：
2022
影响因子：
3.9
通讯作者：
Dolby, Greer A.
中科院分区：
文献类型：
--
作者：
Araya‐Donoso, Raúl;Baty, Sarah M.;Alonso‐Alonso, Pedro;Sanín, María José;Wilder, Benjamin T.;Munguia‐Vega, Adrian;Dolby, Greer A.
目的以往的种群遗传学和地理学研究表明，世代时间和扩散是如何影响种群分化的替代障碍的存在。最近，物种形成基因组研究表明，选择和重组可以同样有效。在这里，我们测试这些因素的相互作用如何塑造预期的分歧，以响应短暂的障碍，并将这些结果与经验文献进行比较，使用下加利福尼亚半岛作为测试案例。LocationGlobal.TaxonDiploid eukaryotes.MethodsWe forward simulated population genome data with CDMetaPOP and SLiM by variing dispersal rate，mutation rate，generation time，选择压力和在物理屏障存在下的重组，然后去除物理屏障。我们测试了哪些因素会影响发散信号（以FST测量）。我们比较了模拟结果的经验文献，包括147记录的世代时间和78个分歧估计从人口genomic studies.ResultsPopulation分化不仅发生由于存在的障碍下较低的扩散能力，但也出现了作为一个结果，结构化的人口之间的低扩散没有障碍。差异选择强化了分化，这一点得到了实证数据的支持。屏障的去除迅速侵蚀了高分散物种的分歧信号（约500代），但低分散物种在基因流恢复后仍保持分歧。在经验数据中，产生时间的变化由四个数量级和分散的三个数量级。主要结论分歧可以出现没有替代障碍，它可能不会产生一个紧张的共发散峰在绝对时间，共发散可能不意味着一个共同的原因发散。更深入地整合地质、气候和基因组数据（即地质基因组学）可能有助于澄清复杂物理环境中的差异起源。
AimPrevious population genetic and phylogeographical studies have shown how generation time and dispersal affect population divergence in the presence of a vicariant barrier. More recently, speciation genomic studies have revealed that selection and recombination can be equally impactful. Here, we test how the interaction of these factors shapes the divergence expected in response to an ephemeral barrier and compare these results to empirical literature using the Baja California peninsula as a test case.LocationGlobal.TaxonDiploid eukaryotes.MethodsWe forward simulated population genomic data with CDMetaPOP and SLiM by varying dispersal rate, mutation rate, generation time, selection pressure and recombination in the presence and then removal of a physical barrier. We tested which factors affect the divergence signal (measured asFST). We compared simulation results to empirical literature that included 147 records of generation times and 78 divergence estimates from population genomic studies.ResultsPopulation differentiation not only occurred due to the presence of a barrier under lower dispersal abilities but also emerged as a result of low dispersal among structured populations without a barrier. Divergent selection strengthened differentiation, which is supported by empirical data. Barrier removal quickly eroded the divergence signal (~500 generations) for high‐dispersing species, but low dispersal species retained divergence after gene flow resumed. In the empirical data, generation times varied by four orders of magnitude and dispersal by three orders of magnitude.Main ConclusionsDivergence can arise without vicariant barriers, it may not produce a tight co‐divergence peak in absolute time, and co‐divergence may not imply a common cause of divergence. Deeper integration of geologic, climatic and genomic data (i.e. geogenomics) may help clarify origins of divergence in physically complex settings.
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影响因子：
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作者：
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通讯作者：
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作者：
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影响因子：
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作者：
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作者：
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