Continent‐wide population genomic structure and phylogeography of North America’s most destructive conifer defoliator, the spruce budworm (Choristoneura fumiferana)

Abstract The spruce budworm, Choristoneura fumiferana, is presumed to be panmictic across vast regions of North America. We examined the extent of panmixia by genotyping 3,650 single nucleotide polymorphism (SNP) loci in 1975 individuals from 128 collections across the continent. We found three spat...

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Autores principales:	Lisa M. Lumley, Esther Pouliot, Jérôme Laroche, Brian Boyle, Bryan M. T. Brunet, Roger C. Levesque, Felix A. H. Sperling, Michel Cusson
Formato:	article
Lenguaje:	EN
Publicado:	Wiley 2020
Materias:	Choristoneura comparative phylogeography genotyping‐by‐sequencing Picea glauca Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/0cff2d95449746debc75f01e981d690a
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spelling	oai:doaj.org-article:0cff2d95449746debc75f01e981d690a2021-11-04T13:06:10ZContinent‐wide population genomic structure and phylogeography of North America’s most destructive conifer defoliator, the spruce budworm (Choristoneura fumiferana)2045-775810.1002/ece3.5950https://doaj.org/article/0cff2d95449746debc75f01e981d690a2020-01-01T00:00:00Zhttps://doi.org/10.1002/ece3.5950https://doaj.org/toc/2045-7758Abstract The spruce budworm, Choristoneura fumiferana, is presumed to be panmictic across vast regions of North America. We examined the extent of panmixia by genotyping 3,650 single nucleotide polymorphism (SNP) loci in 1975 individuals from 128 collections across the continent. We found three spatially structured subpopulations: Western (Alaska, Yukon), Central (southeastern Yukon to the Manitoba–Ontario border), and Eastern (Manitoba–Ontario border to the Atlantic). Additionally, the most diagnostic genetic differentiation between the Central and Eastern subpopulations was chromosomally restricted to a single block of SNPs that may constitute an island of differentiation within the species. Geographic differentiation in the spruce budworm parallels that of its principal larval host, white spruce (Picea glauca), providing evidence that spruce budworm and spruce trees survived in the Beringian refugium through the Last Glacial Maximum and that at least two isolated spruce budworm populations diverged with spruce/fir south of the ice sheets. Gene flow in the spruce budworm may also be affected by mountains in western North America, habitat isolation in West Virginia, regional adaptations, factors related to dispersal, and proximity of other species in the spruce budworm species complex. The central and eastern geographic regions contain individuals that assign to Eastern and Central subpopulations, respectively, indicating that these barriers are not complete. Our discovery of previously undetected geographic and genomic structure in the spruce budworm suggests that further population modelling of this ecologically important insect should consider regional differentiation, potentially co‐adapted blocks of genes, and gene flow between subpopulations.Lisa M. LumleyEsther PouliotJérôme LarocheBrian BoyleBryan M. T. BrunetRoger C. LevesqueFelix A. H. SperlingMichel CussonWileyarticleChoristoneuracomparative phylogeographygenotyping‐by‐sequencingPicea glaucaEcologyQH540-549.5ENEcology and Evolution, Vol 10, Iss 2, Pp 914-927 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	Choristoneura comparative phylogeography genotyping‐by‐sequencing Picea glauca Ecology QH540-549.5
spellingShingle	Choristoneura comparative phylogeography genotyping‐by‐sequencing Picea glauca Ecology QH540-549.5 Lisa M. Lumley Esther Pouliot Jérôme Laroche Brian Boyle Bryan M. T. Brunet Roger C. Levesque Felix A. H. Sperling Michel Cusson Continent‐wide population genomic structure and phylogeography of North America’s most destructive conifer defoliator, the spruce budworm (Choristoneura fumiferana)
description	Abstract The spruce budworm, Choristoneura fumiferana, is presumed to be panmictic across vast regions of North America. We examined the extent of panmixia by genotyping 3,650 single nucleotide polymorphism (SNP) loci in 1975 individuals from 128 collections across the continent. We found three spatially structured subpopulations: Western (Alaska, Yukon), Central (southeastern Yukon to the Manitoba–Ontario border), and Eastern (Manitoba–Ontario border to the Atlantic). Additionally, the most diagnostic genetic differentiation between the Central and Eastern subpopulations was chromosomally restricted to a single block of SNPs that may constitute an island of differentiation within the species. Geographic differentiation in the spruce budworm parallels that of its principal larval host, white spruce (Picea glauca), providing evidence that spruce budworm and spruce trees survived in the Beringian refugium through the Last Glacial Maximum and that at least two isolated spruce budworm populations diverged with spruce/fir south of the ice sheets. Gene flow in the spruce budworm may also be affected by mountains in western North America, habitat isolation in West Virginia, regional adaptations, factors related to dispersal, and proximity of other species in the spruce budworm species complex. The central and eastern geographic regions contain individuals that assign to Eastern and Central subpopulations, respectively, indicating that these barriers are not complete. Our discovery of previously undetected geographic and genomic structure in the spruce budworm suggests that further population modelling of this ecologically important insect should consider regional differentiation, potentially co‐adapted blocks of genes, and gene flow between subpopulations.
format	article
author	Lisa M. Lumley Esther Pouliot Jérôme Laroche Brian Boyle Bryan M. T. Brunet Roger C. Levesque Felix A. H. Sperling Michel Cusson
author_facet	Lisa M. Lumley Esther Pouliot Jérôme Laroche Brian Boyle Bryan M. T. Brunet Roger C. Levesque Felix A. H. Sperling Michel Cusson
author_sort	Lisa M. Lumley
title	Continent‐wide population genomic structure and phylogeography of North America’s most destructive conifer defoliator, the spruce budworm (Choristoneura fumiferana)
title_short	Continent‐wide population genomic structure and phylogeography of North America’s most destructive conifer defoliator, the spruce budworm (Choristoneura fumiferana)
title_full	Continent‐wide population genomic structure and phylogeography of North America’s most destructive conifer defoliator, the spruce budworm (Choristoneura fumiferana)
title_fullStr	Continent‐wide population genomic structure and phylogeography of North America’s most destructive conifer defoliator, the spruce budworm (Choristoneura fumiferana)
title_full_unstemmed	Continent‐wide population genomic structure and phylogeography of North America’s most destructive conifer defoliator, the spruce budworm (Choristoneura fumiferana)
title_sort	continent‐wide population genomic structure and phylogeography of north america’s most destructive conifer defoliator, the spruce budworm (choristoneura fumiferana)
publisher	Wiley
publishDate	2020
url	https://doaj.org/article/0cff2d95449746debc75f01e981d690a
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Continent‐wide population genomic structure and phylogeography of North America’s most destructive conifer defoliator, the spruce budworm (Choristoneura fumiferana)

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