Historical DNA reveals climate adaptation in an endangered songbird

Historical DNA reveals climate adaptation in an endangered songbird
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历史DNA揭示了濒危鸣禽的气候适应能力

DOI:
10.1038/s41558-023-01696-3
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发表时间:
2023
影响因子:
30.7
通讯作者:
Ruegg, Kristen C.
Ruegg, Kristen C.
中科院分区:
地球科学1区
文献类型:
--
作者:
Turbek, Sheela P.;Bossu, Christen;Rayne, Christine;Gruppi, Cristian;Kus, Barbara E.;Whitfield, Mary;Smith, Thomas B.;Paxton, Eben H.;Bay, Rachael A.;Ruegg, Kristen C.

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为了科普气候变化,物种可能会改变其分布或就地适应不断变化的环境条件。然而,通过适应进行遗传变化的明确例子有限。我们探索在濒危的西南部杨柳捕蝇草(Empidonax traillii extimus)的进化对气候变化的反应,通过历史标本,收集于1888年至1909年附近的圣地亚哥,加州,美国,和当代个体之间的全基因组比较从整个繁殖范围。基因组分析表明,基因渗入圣地亚哥增加适应潜力随着时间的推移,并转移全基因组的人口结构向邻近人口。与此相反,与气候(露点温度和降水)相关的基因座从邻近的种群转移到与适应加州南部气候变化一致的方向。这项研究强调了混合物通过其对全基因组遗传变异的影响在促进适应性转变方面的作用,并代表了少数几项记录野生种群气候适应的研究之一。
To cope with climate change, species may shift their distributions or adapt in situ to changing environmental conditions. However, clear examples of genetic changes via adaptation are limited. We explore evolutionary responses to climate change in the endangered southwestern willow flycatcher (Empidonax traillii extimus) through whole-genome comparisons between historical specimens, collected from 1888 to 1909 near San Diego, California, United States, and contemporary individuals from across the breeding range. Genomic analyses revealed that introgression into San Diego increased adaptive potential over time and shifted genome-wide population structure towards that of neighbouring populations. In contrast, loci linked to climate (dew point temperature and precipitation) shifted away from neighbouring populations and in a direction consistent with adaptation to climate change in southern California. This research highlights the role of admixture in facilitating adaptive shifts through its impact on genome-wide genetic variation and represents one of the few studies to document climate adaptation in a wild population.
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