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

Scientific Reports
Andrew J Veale, Michael A Russello

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-sho...Continue Reading

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Citations

Nov 16, 2019·Annual Review of Animal Biosciences·Robin S WaplesCraig R Primmer
Oct 23, 2018·Evolutionary Applications·Robin S Waples, Steven T Lindley
Jun 15, 2019·Journal of Fish Biology·Andrew FergusonPaulo A Prodöhl
Dec 6, 2018·Proceedings of the National Academy of Sciences of the United States of America·Tasha Q ThompsonMichael R Miller
Oct 19, 2017·Genome Biology and Evolution·Andrew J Veale, Michael A Russello
Nov 5, 2020·Journal of Evolutionary Biology·Ksenia J ZuevaVictoria L Pritchard
Dec 22, 2020·Systematic Biology·Graham A McCullochJonathan M Waters
Feb 3, 2021·Molecular Ecology·Charles D WatersCraig R Primmer
Oct 3, 2020·Gene Expression Patterns : GEP·Jacqueline Emmanuel Moustakas-VerhoCraig Robert Primmer
Aug 6, 2021·Molecular Ecology Resources·Seth R SmithLouis Bernatchez

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Methods Mentioned

BETA
genotyping
PCR
Assay
PCRs

Software Mentioned

BEAST
Tracer
ggmap
plotcon
LogCombiner
Geneious
EMBOSS
R
TreeAnnotator
BLAST

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