How stabilizing selection and nongenetic inheritance combine to shape the evolution of phenotypic plasticity

How stabilizing selection and nongenetic inheritance combine to shape the evolution of phenotypic plasticity
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稳定选择和非基因遗传如何结合起来塑造表型可塑性的进化

DOI:
10.1111/jeb.13475
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发表时间:
2019
期刊:
Journal of Evolutionary Biology Research
影响因子:
--
通讯作者:
Levis, N. A. Pfennig
Levis, N. A. Pfennig
中科院分区:
--
文献类型:
--
作者:
Levis, N. A. Pfennig

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关于非基因遗传是否以及如何与选择相互作用以影响表型可塑性的进化,人们知之甚少。在这里,我们凭经验评估了稳定选择和非基因遗传的常见形式(母体环境效应)如何共同影响铲足蟾蜍自然种群表型可塑性的进化。我们将之前的实地工作表明在资源利用表型(“资源多态性”)方面进化出显着可塑性的种群与由于稳定选择有利于较小范围的此类表型而似乎失去了这种可塑性的种群进行了比较。我们表明:(a)自然界中这种明显的可塑性丧失反映了条件依赖性母体效应,而不是可塑性的遗传丧失,即“遗传同化”,并且(b)这种可塑性并不昂贵。通过屏蔽非成本可塑性的选择,一般的非遗传遗传,特别是母体效应,可以阻止遗传同化的发生,从而阻碍适应性(遗传)进化。
Relatively little is known about whether and how nongenetic inheritance interacts with selection to impact the evolution of phenotypic plasticity. Here, we empirically evaluated how stabilizing selection and a common form of nongenetic inheritance—maternal environmental effects—jointly influence the evolution of phenotypic plasticity in natural populations of spadefoot toads. We compared populations that previous fieldwork has shown to have evolved conspicuous plasticity in resource‐use phenotypes (“resource polyphenism”) with those that, owing to stabilizing selection favouring a narrower range of such phenotypes, appear to have lost this plasticity. We show that: (a) this apparent loss of plasticity in nature reflects a condition‐dependent maternal effect and not a genetic loss of plasticity, that is “genetic assimilation,” and (b) this plasticity is not costly. By shielding noncostly plasticity from selection, nongenetic inheritance generally, and maternal effects specifically, can preclude genetic assimilation from occurring and consequently impede adaptive (genetic) evolution.
DOI: 10.1126/science.1148766
发表时间: 2007-11-16
期刊: SCIENCE
影响因子: 56.9
作者:
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发表时间: 2002
期刊: Evolution; international journal of organic evolution
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影响因子: 16.8
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