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P45<br />
Contrasting genomic signatures of local adaptation in lodgepole pine (Pinus<br />
contorta) and interior spruce (Picea glauca x Picea engelmannii)<br />
S. YEAMAN, K. A. HODGINS, K. LOTTERHOS, H. SUREN, T. WANG, P. SMETS, K. NURKOWSKI, J. A.<br />
HOLLIDAY, L. H. RIESEBERG, M. C. WHITLOCK and S. N. AITKEN<br />
Department of Forest and Conservation Sciences, University of British Columbia, 2424 Main Mall,<br />
Vancouver, BC, V6T 1Z4, Canada<br />
Understanding the genomic basis of local adaptation is a central question in evolutionary biology,<br />
with important applications to forestry management. Common garden studies in both lodgepole<br />
pine (Pinus contorta) and interior spruce (Picea glauca x Picea engelmannii) have shown<br />
considerable local adaptation, yet the genomic basis of this adaptation is poorly understood. Here,<br />
we use targeted resequencing of a large fraction of the exome to characterize the genomic basis of<br />
adaptation in hundreds of individuals of each species, sampled along wide geographical and climatic<br />
gradients. We use a combination of GWAS and environment association analyses to identify regions<br />
of the genome with signatures that are strongly consistent with local adaptation. By examining<br />
comparing these signatures among species for thousands of SNPs within 11,833 orthologous genes,<br />
we explore the extent of parallelism and gene re-use in local adaptation.<br />
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