气候变化领域集成服务门户(CCPortal): Neural divergence and hybrid disruption between ecologically isolated Heliconius butterflies

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DOI	10.1073/pnas.2015102118
	Neural divergence and hybrid disruption between ecologically isolated Heliconius butterflies
	Montgomery S.H.; Rossi M.; McMillan W.O.; Merrill R.M.
发表日期	2021
ISSN	00278424
卷号	118 期号:6
英文摘要	The importance of behavioral evolution during speciation is well established, but we know little about how this is manifest in sensory and neural systems. A handful of studies have linked specific neural changes to divergence in host or mate preferences associated with speciation. However, the degree to which brains are adapted to local environmental conditions, and whether this contributes to reproductive isolation between close relatives that have diverged in ecology, remains unknown. Here, we examine divergence in brain morphology and neural gene expression between closely related, but ecologically distinct, Heliconius butterflies. Despite ongoing gene flow, sympatric species pairs within the melpomene-cydno complex are consistently separated across a gradient of open to closed forest and decreasing light intensity. By generating quantitative neuroanatomical data for 107 butterflies, we show that Heliconius melpomene and Heliconius cydno clades have substantial shifts in brain morphology across their geographic range, with divergent structures clustered in the visual system. These neuroanatomical differences are mirrored by extensive divergence in neural gene expression. Differences in both neural morphology and gene expression are heritable, exceed expected rates of neutral divergence, and result in intermediate traits in first-generation hybrid offspring. Strong evidence of divergent selection implies local adaptation to distinct selective optima in each parental microhabitat, suggesting the intermediate traits of hybrids are poorly matched to either condition. Neural traits may therefore contribute to coincident barriers to gene flow, thereby helping to facilitate speciation. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Brain evolution; Ecological speciation; Neuroecology; Niche partitioning; Reproductive isolation
语种	英语
scopus关键词	article; brain; butterfly; cladistics; controlled study; forest; gene expression; gene flow; light intensity; local adaptation; microhabitat; nonhuman; progeny; reproductive isolation; sympatry; visual system
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/180683
作者单位	School of Biological Science, University of Bristol, Bristol, BS8 1TQ, United Kingdom; Smithsonian Tropical Research Institute, Gamboa, 0843-03092, Panama; Division of Evolutionary Biology, LMU Munich, Planegg-Martinsried, 82152, Germany
推荐引用方式 GB/T 7714	Montgomery S.H.,Rossi M.,McMillan W.O.,et al. Neural divergence and hybrid disruption between ecologically isolated Heliconius butterflies[J],2021,118(6).
APA	Montgomery S.H.,Rossi M.,McMillan W.O.,&Merrill R.M..(2021).Neural divergence and hybrid disruption between ecologically isolated Heliconius butterflies.Proceedings of the National Academy of Sciences of the United States of America,118(6).
MLA	Montgomery S.H.,et al."Neural divergence and hybrid disruption between ecologically isolated Heliconius butterflies".Proceedings of the National Academy of Sciences of the United States of America 118.6(2021).