Data for: Sampling affects population genetic inference: a case study of the Allen's (Selasphorus sasin) and rufous hummingbird (Selasphorus rufus) (Part 2/2)

Gene flow can affect evolutionary inference when species are undersampled. Here, we evaluate the effects of gene flow and geographic sampling on demographic inference of two hummingbirds that hybridize, Allen's hummingbird (Selasphorus sasin), and the rufous hummingbird (S. rufus). Using whole-genome data and extensive geographic sampling, we find widespread connectivity, with introgression far beyond the Allen's × rufous hybrid zone, although the Z chromosome resists introgression beyond the hybrid zone. We test alternative hypotheses of speciation history of Allen's, rufous, and Calliope (S. calliope) hummingbirds and find that the rufous hummingbird is the sister taxon to Allen's hummingbird, and the Calliope hummingbird is the outgroup. A model treating the two subspecies of Allen's hummingbird as a single panmictic population fit observed genetic data better than models treating the subspecies as distinct populations, in contrast to morphological and behavioral differences and ...

当物种采样不充分时，基因流（gene flow）会干扰进化推断（evolutionary inference）。本研究以两种杂交蜂鸟——艾伦蜂鸟（Selasphorus sasin）与棕煌蜂鸟（S. rufus）为研究对象，评估了基因流与地理采样对种群历史推断（demographic inference）的影响。本研究借助全基因组数据与大范围地理采样开展分析，结果显示二者存在广泛的基因交流，其基因渐渗（introgression）范围远超艾伦蜂鸟与棕煌蜂鸟的杂交带；不过Z染色体对杂交带以外的基因渐渗具有抗性。我们针对艾伦蜂鸟、棕煌蜂鸟与星蜂鸟（S. calliope）的物种形成历史检验了多种备选假说，结果显示棕煌蜂鸟为艾伦蜂鸟的姊妹群，而星蜂鸟为外类群。相较于将艾伦蜂鸟的两个亚种视为独立种群的模型，将其视为一个随机交配种群（panmictic population）的模型更契合观测到的遗传数据，这与二者在形态与行为上的差异形成了反差，且……