Evolution of anticipatory effects mediated by epigenetic changes

IF 4.8 Q1 GENETICS & HEREDITY Environmental Epigenetics Pub Date : 2020-10-02 DOI:10.1093/eep/dvac007
Ilkka Kronholm
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引用次数: 5

Abstract

Anticipatory effects mediated by epigenetic changes occur when parents modify the phenotype of their offspring by making epigenetic changes in their gametes guided by information from an environmental cue. To investigate when do anticipatory effects mediated by epigenetic changes evolve in a fluctuating environment, I use an individual based simulation model with explicit genetic architecture. The model allows for the population to respond to environmental changes by evolving plasticity, bet-hedging, or by tracking the environment with genetic adaptation, in addition to the evolution of anticipatory effects. The results show that anticipatory effects evolve when the environmental cue provides reliable information about the environment and the environment changes at intermediate rates, provided that fitness costs of anticipatory effects are rather low. Moreover, evolution of anticipatory effects is quite robust to different genetic architectures when reliability of the environmental cue is high. Anticipatory effects always give smaller fitness benefits than within generation plasticity, suggesting a possible reason for generally small observed anticipatory effects in empirical studies.
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表观遗传变化介导的预期效应的进化
当父母在环境线索的信息指导下,通过在配子中进行表观遗传改变来改变后代的表型时,就会产生由表观遗传变化介导的预期效应。为了研究表观遗传变化介导的预期效应何时在波动的环境中进化,我使用了一个具有明确遗传结构的基于个体的模拟模型。该模型允许种群通过进化可塑性、赌注对冲或通过遗传适应跟踪环境,以及预期效应的进化来应对环境变化。结果表明,当环境线索提供了关于环境的可靠信息,并且环境以中等速率变化时,预期效果就会演变,前提是预期效果的适应成本相当低。此外,当环境线索的可靠性高时,预期效应的进化对不同的遗传结构是相当稳健的。预期效应总是比代内可塑性带来更小的适应度效益,这表明在实证研究中观察到的预期效应通常较小的可能原因。
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来源期刊
Environmental Epigenetics
Environmental Epigenetics GENETICS & HEREDITY-
CiteScore
6.50
自引率
5.30%
发文量
0
审稿时长
17 weeks
期刊最新文献
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