How the mountain pine beetle (Dendroctonus ponderosae) breached the Canadian Rocky Mountains.

Autor:	Janes JK; Department of Biological Sciences, University of Alberta, Edmonton, AB, CanadaAlberta Biodiversity Monitoring Institute, University of Alberta, Edmonton, AB, Canada janes1@ualberta.ca., Li Y; Department of Biological Sciences, University of Alberta, Edmonton, AB, Canada., Keeling CI; Michael Smith Laboratories, University of British Columbia, Vancouver, BC, Canada., Yuen MM; Michael Smith Laboratories, University of British Columbia, Vancouver, BC, Canada., Boone CK; Ecosystem Science and Management Program, University of Northern British Columbia, Prince George, BC, Canada., Cooke JE; Department of Biological Sciences, University of Alberta, Edmonton, AB, Canada., Bohlmann J; Michael Smith Laboratories, University of British Columbia, Vancouver, BC, Canada., Huber DP; Ecosystem Science and Management Program, University of Northern British Columbia, Prince George, BC, Canada., Murray BW; Ecosystem Science and Management Program, University of Northern British Columbia, Prince George, BC, Canada., Coltman DW; Department of Biological Sciences, University of Alberta, Edmonton, AB, Canada., Sperling FA; Department of Biological Sciences, University of Alberta, Edmonton, AB, Canada.
Jazyk:	angličtina
Zdroj:	Molecular biology and evolution [Mol Biol Evol] 2014 Jul; Vol. 31 (7), pp. 1803-15. Date of Electronic Publication: 2014 Apr 22.
DOI:	10.1093/molbev/msu135
Abstrakt:	The mountain pine beetle (MPB; Dendroctonus ponderosae Hopkins), a major pine forest pest native to western North America, has extended its range north and eastward during an ongoing outbreak. Determining how the MPB has expanded its range to breach putative barriers, whether physical (nonforested prairie and high elevation of the Rocky Mountains) or climatic (extreme continental climate where temperatures can be below -40 °C), may contribute to our general understanding of range changes as well as management of the current epidemic. Here, we use a panel of 1,536 single nucleotide polymorphisms (SNPs) to assess population genetic structure, connectivity, and signals of selection within this MPB range expansion. Biallelic SNPs in MPB from southwestern Canada revealed higher genetic differentiation and lower genetic connectivity than in the northern part of its range. A total of 208 unique SNPs were identified using different outlier detection tests, of which 32 returned annotations for products with putative functions in cholesterol synthesis, actin filament contraction, and membrane transport. We suggest that MPB has been able to spread beyond its previous range by adjusting its cellular and metabolic functions, with genome scale differentiation enabling populations to better withstand cooler climates and facilitate longer dispersal distances. Our study is the first to assess landscape-wide selective adaptation in an insect. We have shown that interrogation of genomic resources can identify shifts in genetic diversity and putative adaptive signals in this forest pest species. (© The Author 2014. Published by Oxford University Press on behalf of the Society for Molecular Biology and Evolution.)
Databáze:	MEDLINE
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