揭示欧洲夜莺(Caprimulgus europaeus)的繁殖史。

IF 4.6 Q2 MATERIALS SCIENCE, BIOMATERIALS
George Day, Graeme Fox, Helen Hipperson, Kathryn H. Maher, Rachel Tucker, Gavin J. Horsburgh, Dean Waters, Kate L. Durant, Terry Burke, Jon Slate, Kathryn E. Arnold
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引用次数: 0

摘要

一个物种的人口历史为当代种群遗传学提供了重要的背景资料,并为了解过去对气候变化的反应提供了可能;个体的基因组则为了解当代种群的进化史提供了一个窗口。成对序列马尔可夫聚合(Pairwise sequentially Markovian coalescent,PSMC)分析利用来自单个基因组的信息,推导出过去约500万年间有效种群规模的波动变化。在这里,我们将PSMC分析应用于在西北欧和南欧采样的两个欧洲夜莺(Caprimulgus europaeus)基因组,旨在揭示欧洲夜莺的人口历史。我们成功地重建了过去 500 万年的有效种群数量。我们的分析表明,随着全球气候变化,夜莺的有效种群数量在稳定的温暖时期广泛增加,而在较冷时期和漫长的冰川期则有所减少。对两个基因组的假二倍体组合进行的 PSMC 分析表明,随着时间的推移,祖先种群之间的基因流发生了波动,基因流在上一个冰川期停止了流动。我们的研究结果初步表明,欧洲夜莺种群出现了分化,分化的时间与冰川时期受限于不同的避难所而出现分化的时间一致。最后,我们的研究结果表明,夜莺的迁徙行为很可能是在末次冰川期之前进化而来的,其长途迁徙行为似乎持续了整个更新世。然而,要了解夜莺在整个分布区内分化的程度和起源,还需要对该物种当代分布区内已知繁殖地的个体进行进一步的遗传结构分析。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Revealing the Demographic History of the European Nightjar (Caprimulgus europaeus)

Revealing the Demographic History of the European Nightjar (Caprimulgus europaeus)

A species' demographic history gives important context to contemporary population genetics and a possible insight into past responses to climate change; with an individual's genome providing a window into the evolutionary history of contemporary populations. Pairwise sequentially Markovian coalescent (PSMC) analysis uses information from a single genome to derive fluctuations in effective population size change over the last ~5 million years. Here, we apply PSMC analysis to two European nightjar (Caprimulgus europaeus) genomes, sampled in Northwest and Southern Europe, with the aim of revealing the demographic history of nightjar in Europe. We successfully reconstructed effective population size over the last 5 million years. Our analysis shows that in response to global climate change, the effective population size of nightjar broadly increased under stable warm periods and decreased during cooler spans and prolonged glacial periods. PSMC analysis on the pseudo-diploid combination of the two genomes revealed fluctuations in gene flow between ancestral populations over time, with gene flow ceasing by the last-glacial period. Our results are tentatively suggestive of divergence in the European nightjar population, with timings consistent with differentiation being driven by restriction to different refugia during periods of glaciation. Finally, our results suggest that migratory behaviour in nightjar likely evolved prior to the last-glacial period, with long-distance migration seemingly persisting throughout the Pleistocene. However, further genetic structure analysis of individuals from known breeding sites across the species' contemporary range is needed to understand the extent and origins of range-wide differentiation in nightjar.

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来源期刊
ACS Applied Bio Materials
ACS Applied Bio Materials Chemistry-Chemistry (all)
CiteScore
9.40
自引率
2.10%
发文量
464
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