An ancient selective sweep linked to reproductive life history evolution in sockeye salmon

Abstract Study of parallel (or convergent) phenotypic evolution can provide important insights into processes driving sympatric, ecologically-mediated divergence and speciation, as ecotype pairs may provide a biological replicate of the underlying signals and mechanisms. Here, we provide evidence fo...

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Autores principales:	Andrew J. Veale, Michael A. Russello
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/7381bae948834d25b86975f5561ebdca
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spelling	oai:doaj.org-article:7381bae948834d25b86975f5561ebdca2021-12-02T11:40:21ZAn ancient selective sweep linked to reproductive life history evolution in sockeye salmon10.1038/s41598-017-01890-22045-2322https://doaj.org/article/7381bae948834d25b86975f5561ebdca2017-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-01890-2https://doaj.org/toc/2045-2322Abstract Study of parallel (or convergent) phenotypic evolution can provide important insights into processes driving sympatric, ecologically-mediated divergence and speciation, as ecotype pairs may provide a biological replicate of the underlying signals and mechanisms. Here, we provide evidence for a selective sweep creating an island of divergence associated with reproductive behavior in sockeye salmon (Oncorhynchus nerka), identifying a series of linked single nucleotide polymorphisms across a ~22,733 basepair region spanning the leucine-rich repeat-containing protein 9 gene exhibiting signatures of divergent selection associated with stream- and shore-spawning in both anadromous and resident forms across their pan-Pacific distribution. This divergence likely occurred ~3.8 Mya (95% HPD = 2.1–6.03 Mya), after sockeye separated from pink (O. gorbuscha) and chum (O. keta) salmon, but prior to the Pleistocene glaciations. Our results suggest recurrent evolution of reproductive ecotypes across the native range of O. nerka is at least partially associated with divergent selection of pre-existing genetic variation within or linked to this region. As sockeye salmon are unique among Pacific salmonids in their flexibility to spawn in lake-shore benthic environments, this region provides great promise for continued investigation of the genomic basis of O. nerka life history evolution, and, more broadly, for increasing our understanding of the heritable basis of adaptation of complex traits in novel environments.Andrew J. VealeMichael A. RusselloNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-10 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Andrew J. Veale Michael A. Russello An ancient selective sweep linked to reproductive life history evolution in sockeye salmon
description	Abstract Study of parallel (or convergent) phenotypic evolution can provide important insights into processes driving sympatric, ecologically-mediated divergence and speciation, as ecotype pairs may provide a biological replicate of the underlying signals and mechanisms. Here, we provide evidence for a selective sweep creating an island of divergence associated with reproductive behavior in sockeye salmon (Oncorhynchus nerka), identifying a series of linked single nucleotide polymorphisms across a ~22,733 basepair region spanning the leucine-rich repeat-containing protein 9 gene exhibiting signatures of divergent selection associated with stream- and shore-spawning in both anadromous and resident forms across their pan-Pacific distribution. This divergence likely occurred ~3.8 Mya (95% HPD = 2.1–6.03 Mya), after sockeye separated from pink (O. gorbuscha) and chum (O. keta) salmon, but prior to the Pleistocene glaciations. Our results suggest recurrent evolution of reproductive ecotypes across the native range of O. nerka is at least partially associated with divergent selection of pre-existing genetic variation within or linked to this region. As sockeye salmon are unique among Pacific salmonids in their flexibility to spawn in lake-shore benthic environments, this region provides great promise for continued investigation of the genomic basis of O. nerka life history evolution, and, more broadly, for increasing our understanding of the heritable basis of adaptation of complex traits in novel environments.
format	article
author	Andrew J. Veale Michael A. Russello
author_facet	Andrew J. Veale Michael A. Russello
author_sort	Andrew J. Veale
title	An ancient selective sweep linked to reproductive life history evolution in sockeye salmon
title_short	An ancient selective sweep linked to reproductive life history evolution in sockeye salmon
title_full	An ancient selective sweep linked to reproductive life history evolution in sockeye salmon
title_fullStr	An ancient selective sweep linked to reproductive life history evolution in sockeye salmon
title_full_unstemmed	An ancient selective sweep linked to reproductive life history evolution in sockeye salmon
title_sort	ancient selective sweep linked to reproductive life history evolution in sockeye salmon
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/7381bae948834d25b86975f5561ebdca
work_keys_str_mv	AT andrewjveale anancientselectivesweeplinkedtoreproductivelifehistoryevolutioninsockeyesalmon AT michaelarussello anancientselectivesweeplinkedtoreproductivelifehistoryevolutioninsockeyesalmon AT andrewjveale ancientselectivesweeplinkedtoreproductivelifehistoryevolutioninsockeyesalmon AT michaelarussello ancientselectivesweeplinkedtoreproductivelifehistoryevolutioninsockeyesalmon
_version_	1718395651094478848

An ancient selective sweep linked to reproductive life history evolution in sockeye salmon

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