广泛分布的新热带鸟类（Xenops minutus）的基因组变异揭示了分歧，种群扩张和基因流
Genomic variation in a widespread Neotropical bird (Xenops minutus) reveals divergence, population expansion, and gene flow
摘要：
阐明物种的人口和地理分布历史有助于深入了解产生生物多样性〈动〉性<动>的过程，而基因组数据集现在可以以前所未有的准确性估计历史和人口参数。我们使用了基因组单核苷酸多态性（SNP）数据集，使用RAD-Seq方法来调查历史人口统计学和分布广泛的低地新热带鸟类（Xenops minutus）的地理分布。正如预期的那样，我们发现，突出的景观特征，作为分散的障碍，如亚马逊河和安第斯山脉，与最深的地理断裂，以及距离隔离是有限的，在这些障碍之间的地区。此外，我们推断大多数种群的人口正增长，并检测到现在物理隔离的种群之间的历史基因流的证据。即使用基因组估计的历史人口参数，我们发现突出的多样化假设是不可检验的。我们的结论是，调查的多样性过程塑造物种的历史，基因组数据集的帮助下，将提供更高的分辨率的多样化在新热带地区，但未来的努力应该集中在理解的过程塑造的历史谱系，而不是试图调和这些历史与地球历史上的景观和气候事件。
英文摘要：
Elucidating the demographic and phylogeographic histories of species provides insight into the processes responsible for generating biological diversity, and genomic datasets are now permitting the estimation of histories and demographic parameters with unprecedented accuracy. We used a genomic single nucleotide polymorphism (SNP) dataset generated using a RAD-Seq method to investigate the historical demography and phylogeography of a widespread lowland Neotropical bird (Xenops minutus). As expected, we found that prominent landscape features that act as dispersal barriers, such as Amazonian rivers and the Andes Mountains, are associated with the deepest phylogeographic breaks, and also that isolation by distance is limited in areas between these barriers. In addition, we inferred positive population growth for most populations and detected evidence of historical gene flow between populations that are now physically isolated. Even with genomic estimates of historical demographic parameters, we found the prominent diversification hypotheses to be untestable. We conclude that investigations into the multifarious processes shaping species histories, aided by genomic datasets, will provide greater resolution of diversification in the Neotropics, but that future efforts should focus on understanding the processes shaping the histories of lineages rather than trying to reconcile these histories with landscape and climatic events in Earth history.
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