Adaptation to climate across the Arabidopsis thaliana genome |
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Authors: | Hancock Angela M Brachi Benjamin Faure Nathalie Horton Matthew W Jarymowycz Lucien B Sperone F Gianluca Toomajian Chris Roux Fabrice Bergelson Joy |
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Affiliation: | Department of Ecology and Evolution, University of Chicago, 1101 East 57th Street, Chicago, IL 60637, USA. |
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Abstract: | Understanding the genetic bases and modes of adaptation to current climatic conditions is essential to accurately predict responses to future environmental change. We conducted a genome-wide scan to identify climate-adaptive genetic loci and pathways in the plant Arabidopsis thaliana. Amino acid-changing variants were significantly enriched among the loci strongly correlated with climate, suggesting that our scan effectively detects adaptive alleles. Moreover, from our results, we successfully predicted relative fitness among a set of geographically diverse A. thaliana accessions when grown together in a common environment. Our results provide a set of candidates for dissecting the molecular bases of climate adaptations, as well as insights about the prevalence of selective sweeps, which has implications for predicting the rate of adaptation. |
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