Genomic basis and evolutionary potential for extreme drought adaptation in Arabidopsis thaliana.
Genomic basis and evolutionary potential for extreme drought adaptation in Arabidopsis thaliana.
复制标题
拟南芥中极端干旱适应的基因组基础和进化潜力。
DOI：
10.1038/s41559-017-0423-0
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发表时间：
2018-03
影响因子：
16.8
通讯作者：
Weigel D
中科院分区：
文献类型：
--
作者：
Exposito-Alonso M;Vasseur F;Ding W;Wang G;Burbano HA;Weigel D
由于地球目前正在经历剧烈的气候变化，了解物种将如何应对气候变化是至关重要的。一个物种抵御气候变化的机会可能取决于物种内部的多样性，特别是是否有已经适应极端环境的亚群。然而，大多数预测性研究忽略了物种包括遗传多样性个体。我们已经在拟南芥中发现了与极端干旱事件生存相关的遗传变异，这是全球变暖的一个主要后果。随后，我们确定了这些变异如何在物种的原生范围内分布。遗传等位基因赋予更高的干旱生存表现出多基因适应的签名，更频繁地发现在地中海和斯堪的纳维亚地区。使用地理环境模型，我们预测，中欧，但不是地中海，人口可能会落后于适应到21世纪末世纪。进一步的分析表明，种群的下降可以通过自然选择有效地克服现存变异或通过适应性个体从物种分布边缘的种群中迁移来补偿。这些发现强调了物种内遗传异质性在促进对气候变化的进化反应方面的重要性。
Because earth is currently experiencing dramatic climate change, it is of critical interest to understand how species will respond to it. The chance of a species to withstand climate change will likely depend on the diversity within the species and, particularly, whether there are subpopulations that are already adapted to extreme environments. However, most predictive studies ignore that species comprise genetically diverse individuals. We have identified genetic variants in Arabidopsis thaliana that are associated with survival of an extreme drought event, a major consequence of global warming. Subsequently, we determined how these variants are distributed across the native range of the species. Genetic alleles conferring higher drought survival showed signatures of polygenic adaptation, and were more frequently found in Mediterranean and Scandinavian regions. Using geo-environmental models, we predicted that Central European, but not Mediterranean, populations might lag behind in adaptation by the end of the 21st century. Further analyses showed that a population decline could nevertheless be compensated by natural selection acting efficiently over standing variation or by migration of adapted individuals from populations at the margins of the species’ distribution. These findings highlight the importance of within-species genetic heterogeneity in facilitating an evolutionary response to a changing climate.
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DOI：
10.1073/pnas.1517456113
发表时间：
2016-05-17
影响因子：
11.1
作者：
Fournier-Level, Alexandre;Perry, Emily O.;Schmitt, Johanna
通讯作者：
Schmitt, Johanna
影响因子：
4.5
作者：
Berg JJ;Coop G
通讯作者：
Coop G
影响因子：
2.6
作者：
Kenney AM;McKay JK;Richards JH;Juenger TE
通讯作者：
Juenger TE
影响因子：
56.9
作者：
Fournier-Level, A.;Korte, A.;Wilczek, A. M.
通讯作者：
Wilczek, A. M.
影响因子：
56.9
作者：
Hancock, Angela M.;Brachi, Benjamin;Bergelson, Joy
通讯作者：
Bergelson, Joy