RUNAWAY COEVOLUTION: ADAPTATION TO HERITABLE AND NONHERITABLE ENVIRONMENTS
RUNAWAY COEVOLUTION: ADAPTATION TO HERITABLE AND NONHERITABLE ENVIRONMENTS
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DOI：
10.1111/evo.12470
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发表时间：
2014-10-01
期刊：
影响因子：
3.3
通讯作者：
Wade, Michael J.
中科院分区：
文献类型：
--
作者：
Drown, Devin M.;Wade, Michael J.
种群的进化是对外部环境的反应，无论是非生物的（例如，例如，在一个实施例中，气候）或生物（e.例如，在一个实施例中，其他同类）。我们研究了如何适应生物，遗传环境的不同适应非生物，非遗传环境。我们发现，对于相同的选择系数，基因和遗传环境之间的共适应过程比遗传适应非生物非遗传环境要快得多。适应率的提高是由于遗传环境和对遗传环境作出反应的基因之间的相互选择所产生的正相关性，这些相关性导致了适应性协同进化的失控过程，即使创造遗传环境的基因和对遗传环境作出反应的基因是分离的。虽然紧密的连锁程度加速了共适应过程，但相当数量的近亲繁殖所引起的加速更大，因为近亲繁殖对减少几代人的功能重组具有累积效应。我们的研究结果表明，适应当地的非生物环境变化可能会导致人口的快速多样化和随后的生殖隔离，而不是直接，而是通过其对遗传环境和基因的影响，以响应他们。
Populations evolve in response to the external environment, whether abiotic (e. g., climate) or biotic (e. g., other conspecifics). We investigated how adaptation to biotic, heritable environments differs from adaptation to abiotic, nonheritable environments. We found that, for the same selection coefficients, the coadaptive process between genes and heritable environments is much faster than genetic adaptation to an abiotic nonheritable environment. The increased rate of adaptation results from the positive association generated by reciprocal selection between the heritable environment and the genes responding to it. These associations result in a runaway process of adaptive coevolution, even when the genes creating the heritable environment and genes responding to the heritable environment are unlinked. Although tightening the degree of linkage accelerates the coadaptive process, the acceleration caused by a comparable amount of inbreeding is greater, because inbreeding has a cumulative effect on reducing functional recombination over generations. Our results suggest that that adaptation to local abiotic environmental variation may result in the rapid diversification of populations and subsequent reproductive isolation not directly but rather via its effects on heritable environments and the genes responding to them.