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Permanent link (DOI): https://doi.org/10.7939/R3Z86K

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Characterizing the physical and genetic structure of the lodgepole pine × jack pine hybrid zone: mosaic structure and differential introgression Open Access

Descriptions

Author or creator
Cullingham,Catherine I.
James, Patrick M. A.
Cooke, Janice E. K.
Coltman, David W.
Additional contributors
Subject/Keyword
jack pine
hybridization
lodgepole pine
environmental modeling
Pinus contorta
Pinus banksiana
Type of item
Journal Article (Published)
Language
english
Place
Time
Description
Understanding the physical and genetic structure of hybrid zones can illuminate factors affecting their formation and stability. In north-central Alberta, lodgepole pine (Pinus contorta Dougl. ex Loud. var. latifolia) and jack pine (Pinus banksiana Lamb) form a complex and poorly defined hybrid zone. Better knowledge of this zone is relevant, given the recent host expansion of mountain pine beetle into jack pine. We characterized the zone by genotyping 1998 lodgepole, jack pine, and hybrids from British Columbia, Alberta, Saskatchewan, Ontario, and Minnesota at 11 microsatellites. Using Bayesian algorithms, we calculated genetic ancestry and used this to model the relationship between species occurrence and environment. In addition, we analyzed the ancestry of hybrids to calculate the genetic contribution of lodgepole and jack pine. Finally, we measured the amount of gene flow between the pure species. We found the distribution of the pine classes is explained by environmental variables, and these distributions differ from classic distribution maps. Hybrid ancestry was biased toward lodgepole pine; however, gene flow between the two species was equal. The results of this study suggest that the hybrid zone is complex and influenced by environmental constraints. As a result of this analysis, range limits should be redefined.
Date created
2012
DOI
doi:10.7939/R3Z86K
License information
Attribution 4.0 International
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Citation for previous publication
Cullingham, C.I., James, P.M.A., Cooke, J.E.K., Coltman, D.W. (2012). Characterizing the physical and genetic structure of the lodgepole pine × jack pine hybrid zone: mosaic structure and differential introgression. Evolutionary Applications, 5(8), 879-891, doi: 10.1111/j.1752-4571.2012.00266.x.
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