IntraBioDiv Consortium members are in Appendix S1.
Article first published online: 10 JUN 2012
© 2012 Blackwell Publishing Ltd
Volume 21, Issue 15, pages 3729–3738, August 2012
How to Cite
MANEL, S., GUGERLI, F., THUILLER, W., ALVAREZ, N., LEGENDRE, P., HOLDEREGGER, R., GIELLY, L., TABERLET, P. and IntraBioDiv Consortium (2012), Broad-scale adaptive genetic variation in alpine plants is driven by temperature and precipitation. Molecular Ecology, 21: 3729–3738. doi: 10.1111/j.1365-294X.2012.05656.x
- Issue published online: 17 JUL 2012
- Article first published online: 10 JUN 2012
- Received 24 July 2011; revision received 4 April 2012; accepted 11 April 2012
- climate change;
- environmental association analysis;
- genome scan;
- landscape genetics;
- loci of ecological relevance
Identifying adaptive genetic variation is a challenging task, in particular in non-model species for which genomic information is still limited or absent. Here, we studied distribution patterns of amplified fragment length polymorphisms (AFLPs) in response to environmental variation, in 13 alpine plant species consistently sampled across the entire European Alps. Multiple linear regressions were performed between AFLP allele frequencies per site as dependent variables and two categories of independent variables, namely Moran’s eigenvector map MEM variables (to account for spatial and unaccounted environmental variation, and historical demographic processes) and environmental variables. These associations allowed the identification of 153 loci of ecological relevance. Univariate regressions between allele frequency and each environmental factor further showed that loci of ecological relevance were mainly correlated with MEM variables. We found that precipitation and temperature were the best environmental predictors, whereas topographic factors were rarely involved in environmental associations. Climatic factors, subject to rapid variation as a result of the current global warming, are known to strongly influence the fate of alpine plants. Our study shows, for the first time for a large number of species, that the same environmental variables are drivers of plant adaptation at the scale of a whole biome, here the European Alps.