Rapid adaptive evolution of the diapause program during range expansion of an invasive mosquito.
Rapid adaptive evolution of the diapause program during range expansion of an invasive mosquito.
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DOI：
10.1111/evo.14029
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发表时间：
2020-07
期刊：
影响因子：
--
通讯作者：
Armbruster PA
中科院分区：
文献类型：
--
作者：
Batz ZA;Clemento AJ;Fritzenwanker J;Ring TJ;Garza JC;Armbruster PA
在温带气候中，冬季反复出现的季节性紧急情况对各种生物体构成了基本的生理挑战。作为回应，许多温带昆虫进入滞育，这是一种替代性的发育程序，包括发育停滞，使生物体能够使其生命周期与季节性环境变化同步。滞育物候的地理变异有助于当地的气候适应是有据可查的。然而，很少有研究探讨了如何快速演变的一套性状表示整个滞育程序可能有助于气候适应当代的时间尺度。在这里，我们调查的滞育程序在过去35年的演变，利用“自然实验”提出的亚洲虎蚊，白纹伊蚊，在美国东部的最近入侵。我们从两个不同的气候区域采样，两个区域相隔6°纬度（约700公里）。使用普通花园实验，我们确定了滞育相关的耐寒性，滞育持续时间和滞育后饥饿耐受性的区域遗传差异。我们还发现了非滞育热性能的区域差异。与此相反，我们观察到最小的区域分歧在非滞育幼虫的生长性状和中性分子标记位点。我们的研究结果表明，滞育程序的快速演变，并意味着强大的选择所造成的差异，冬季条件。
In temperate climates, the recurring seasonal exigencies of winter represent a fundamental physiological challenge for a wide range of organisms. In response, many temperate insects enter diapause, an alternative developmental program, including developmental arrest, that allows organisms to synchronize their life cycle with seasonal environmental variation. Geographic variation in diapause phenology contributing to local climatic adaptation is well documented. However, few studies have examined how the rapid evolution of a suite of traits expressed across the diapause program may contribute to climatic adaptation on a contemporary timescale. Here, we investigate the evolution of the diapause program over the past 35 years by leveraging a “natural experiment” presented by the recent invasion of the Asian tiger mosquito, Aedes albopictus, across the eastern United States. We sampled populations from two distinct climatic regions separated by 6° of latitude (∼700 km). Using common‐garden experiments, we identified regional genetic divergence in diapause‐associated cold tolerance, diapause duration, and postdiapause starvation tolerance. We also found regional divergence in nondiapause thermal performance. In contrast, we observed minimal regional divergence in nondiapause larval growth traits and at neutral molecular marker loci. Our results demonstrate rapid evolution of the diapause program and imply strong selection caused by differences in winter conditions.
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影响因子：
3.3
作者：
Bradshaw, WE;Zani, PA;Holzapfel, CM
通讯作者：
Holzapfel, CM
影响因子：
3.4
作者：
Gaston, KJ;Chown, SL
通讯作者：
Chown, SL
影响因子：
2.1
作者：
Benedict, Mark Q.;Levine, Rebecca S.;Lounibos, L. Philip
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Lounibos, L. Philip
影响因子：
8.8
作者：
Bush, Alex;Mokany, Karel;Ferrier, Simon
通讯作者：
Ferrier, Simon
影响因子：
2.1
作者：
HAWLEY, WA;PUMPUNI, CB;CRAIG, GB
通讯作者：
CRAIG, GB