globalchange  > 全球变化的国际研究计划
DOI: 10.1111/eva.12768
WOS记录号: WOS:000480580300013
论文题名:
Does gene flow aggravate or alleviate maladaptation to environmental stress in small populations?
作者: Fitzpatrick, Sarah W.; Reid, Brendan N.
通讯作者: Fitzpatrick, Sarah W.
刊名: EVOLUTIONARY APPLICATIONS
ISSN: 1752-4571
出版年: 2019
卷: 12, 期:7, 页码:1402-1416
语种: 英语
英文关键词: gene flow ; genetic drift ; Poecilia reticulata ; RADseq ; stress response ; thermal tolerance
WOS关键词: LIFE-HISTORY EVOLUTION ; GUPPIES POECILIA-RETICULATA ; HETEROZYGOSITY-FITNESS CORRELATIONS ; INBREEDING DEPRESSION ; ADAPTIVE DIVERGENCE ; LOCAL ADAPTATION ; CLIMATE-CHANGE ; R-PACKAGE ; TOOL SET ; RESCUE
WOS学科分类: Evolutionary Biology
WOS研究方向: Evolutionary Biology
英文摘要:

Environmental change can expose populations to unfamiliar stressors, and maladaptive responses to those stressors may result in population declines or extirpation. Although gene flow is classically viewed as a cause of maladaptation, small and isolated populations experiencing high levels of drift and little gene flow may be constrained in their evolutionary response to environmental change. We provide a case study using the model Trinidadian guppy system that illustrates the importance of considering gene flow and genetic drift when predicting (mal)adaptive response to acute stress. We compared population genomic patterns and acute stress responses of inbred guppy populations from headwater streams either with or without a recent history of gene flow from a more diverse mainstem population. Compared to "no-gene flow" analogues, we found that populations with recent gene flow showed higher genomic variation and increased stress tolerance-but only when exposed to a stress familiar to the mainstem population (heat shock). All headwater populations showed similar responses to a familiar stress in headwater environments (starvation) regardless of gene flow history, whereas exposure to an entirely unfamiliar stress (copper sulfate) showed population-level variation unrelated to environment or recent evolutionary history. Our results suggest that (mal)adaptive responses to acutely stressful environments are determined in part by recent evolutionary history and in part by previous exposure. In some cases, gene flow may provide the variation needed to persist, and eventually adapt, in the face of novel stress.


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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/144612
Appears in Collections:全球变化的国际研究计划

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作者单位: Michigan State Univ, WK Kellogg Biol Stn, Dept Integrat Biol, Hickory Corners, MI 49060 USA

Recommended Citation:
Fitzpatrick, Sarah W.,Reid, Brendan N.. Does gene flow aggravate or alleviate maladaptation to environmental stress in small populations?[J]. EVOLUTIONARY APPLICATIONS,2019-01-01,12(7):1402-1416
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