Increased socially mediated plasticity in gene expression accompanies rapid adaptive evolution
Increased socially mediated plasticity in gene expression accompanies rapid adaptive evolution
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DOI：
10.1111/ele.12920
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发表时间：
2018-04-01
期刊：
影响因子：
8.8
通讯作者：
Bailey, Nathan W.
中科院分区：
文献类型：
--
作者：
Pascoal, Sonia;Liu, Xuan;Bailey, Nathan W.
最近的理论预测，随着性状对选择的反应，表型可塑性的增加可以促进适应。当遗传适应改变社会环境时，社会中介的可塑性可能会导致共同进化的反馈动力，从而增加适应潜力。我们通过询问最近出现的适应变种的远洋蟋蟀的神经基因表达是否比祖先的变种对社会环境更敏感来测试这一点。沉默的雄性(平翅)在夏威夷种群中迅速传播，受到声学定向寄生虫的影响，改变了种群的声环境。在饲养过程中改变蟋蟀的声音环境的实验表明，基因表达发生了广泛的可塑性变化。然而，扁平翼型表现出更高的社会中介可塑性，而正常翼型表现出可以忽略的表达可塑性。平翅蟋蟀的可塑性增加表明，社会上灵活的基因表达与平翅的突然传播是一个共同的进化过程。我们的结果支持这样的预测，即在适应的早期阶段，表型可塑性应该迅速演变为更明显。
Recent theory predicts that increased phenotypic plasticity can facilitate adaptation as traits respond to selection. When genetic adaptation alters the social environment, socially mediated plasticity could cause co-evolutionary feedback dynamics that increase adaptive potential. We tested this by asking whether neural gene expression in a recently arisen, adaptive morph of the field cricket Teleogryllus oceanicus is more responsive to the social environment than the ancestral morph. Silent males (flatwings) rapidly spread in a Hawaiian population subject to acoustically orienting parasitoids, changing the population's acoustic environment. Experimental altering crickets' acoustic environments during rearing revealed broad, plastic changes in gene expression. However, flatwing genotypes showed increased socially mediated plasticity, whereas normal-wing genotypes exhibited negligible expression plasticity. Increased plasticity in flatwing crickets suggests a coevolutionary process coupling socially flexible gene expression with the abrupt spread of flatwing. Our results support predictions that phenotypic plasticity should rapidly evolve to be more pronounced during early phases of adaptation.