Plastic responses to novel environments are biased towards phenotype dimensions with high additive genetic variation
Plastic responses to novel environments are biased towards phenotype dimensions with high additive genetic variation
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DOI：
10.1073/pnas.1821066116
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发表时间：
2019-07-02
影响因子：
11.1
通讯作者：
Uller, Tobias
中科院分区：
文献类型：
--
作者：
Noble, Daniel W. A.;Radersma, Reinder;Uller, Tobias
环境诱导的表型已经被提出来启动和偏向适应性进化变化向特定方向发展。这种情况发生的可能性部分取决于塑料反应与性状的加性遗传方差和协方差的一致性。使用荟萃分析，我们表明，新环境的塑料反应往往发生沿着表型尺寸，窝藏大量的加性遗传变异。这表明，选择或反对环境诱导的表型通常将是有效的。对可塑性方向和加性遗传变异主轴之间的一致性的一种解释是，发育系统倾向于对环境的新奇性做出反应，就像它们对基因突变做出反应一样。这使得区分进化的方向是受到可塑性还是遗传“约束”的影响变得很有挑战性。“因此，我们的研究结果强调需要新的理论和经验方法来解决可塑性在进化中的作用。
Environmentally induced phenotypes have been proposed to initiate and bias adaptive evolutionary change toward particular directions. The potential for this to happen depends in part on how well plastic responses are aligned with the additive genetic variance and covariance in traits. Using meta-analysis, we demonstrate that plastic responses to novel environments tend to occur along phenotype dimensions that harbor substantial amounts of additive genetic variation. This suggests that selection for or against environmentally induced phenotypes typically will be effective. One interpretation of the alignment between the direction of plasticity and the main axis of additive genetic variation is that developmental systems tend to respond to environmental novelty as they do to genetic mutation. This makes it challenging to distinguish if the direction of evolution is biased by plasticity or genetic "constraint." Our results therefore highlight a need for new theoretical and empirical approaches to address the role of plasticity in evolution.