A supergene-linked estrogen receptor drives alternative phenotypes in a polymorphic songbird

A supergene-linked estrogen receptor drives alternative phenotypes in a polymorphic songbird
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超基因相关的雌激素受体驱动多态鸣禽的替代表型

DOI:
10.1073/pnas.2011347117
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发表时间:
2020
期刊:
Proceedings of the National Academy of Sciences
影响因子:
--
通讯作者:
Maney, Donna L.
Maney, Donna L.
中科院分区:
--
文献类型:
--
作者:
Merritt, Jennifer R.;Grogan, Kathleen E.;Zinzow-Kramer, Wendy M.;Sun, Dan;Ortlund, Eric A.;Yi, Soojin V.;Maney, Donna L.

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行为进化依赖于遗传变化,但很少有行为可以追溯到脊椎动物的特定遗传序列。在这里,我们提供的实验证据表明,一个单一的基因的分化,有助于不同的行为表型在白喉麻雀,一种常见的后院鸣禽的进化。在这个物种中,一系列的染色体倒位已经形成了一个超基因,该超基因与侵略性表型分离。超基因捕获了编码雌激素受体α(ERα)的基因ESR 1;因此,该基因正在积累变化,现在将超基因等位基因与标准等位基因区分开来。我们的研究结果表明,在更积极的表型的鸟类,ERα敲低引起的表型变化的积极性较低的表型。我们接下来表明,在自由生活的人群中,攻击性是由支持超基因等位基因的等位基因不平衡预测的。最后,我们确定了顺式调节功能,遗传和表观遗传,解释等位基因的不平衡。这项工作提供了一个罕见的说明如何基因型分歧导致行为表型分歧的脊椎动物。
Behavioral evolution relies on genetic changes, yet few behaviors can be traced to specific genetic sequences in vertebrates. Here we provide experimental evidence showing that differentiation of a single gene has contributed to the evolution of divergent behavioral phenotypes in the white-throated sparrow, a common backyard songbird. In this species, a series of chromosomal inversions has formed a supergene that segregates with an aggressive phenotype. The supergene has capturedESR1, the gene that encodes estrogen receptor α (ERα); as a result, this gene is accumulating changes that now distinguish the supergene allele from the standard allele. Our results show that in birds of the more aggressive phenotype, ERα knockdown caused a phenotypic change to that of the less aggressive phenotype. We next showed that in a free-living population, aggression is predicted by allelic imbalance favoring the supergene allele. Finally, we identifiedcis-regulatory features, both genetic and epigenetic, that explain the allelic imbalance. This work provides a rare illustration of how genotypic divergence has led to behavioral phenotypic divergence in a vertebrate.
用组成型活性雌激素受体探测雌激素受体激活的机制:与 DNA 和共调节因子相互作用以及受体构象变化的相关性。
DOI: 10.1210/mend.11.9.9983
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影响因子: 11.1
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