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This content will become publicly available on May 19, 2024

Title: Convergent genomic signatures of local adaptation across a continental-scale environmental gradient
Convergent local adaptation offers a glimpse into the role of constraint and stochasticity in adaptive evolution, in particular the extent to which similar genetic mechanisms drive adaptation to common selective forces. Here, we investigated the genomics of local adaptation in two nonsister woodpeckers that are codistributed across an entire continent and exhibit remarkably convergent patterns of geographic variation. We sequenced the genomes of 140 individuals of Downy (Dryobates pubescens) and Hairy (Dryobates villosus) woodpeckers and used a suite of genomic approaches to identify loci under selection. We showed evidence that convergent genes have been targeted by selection in response to shared environmental pressures, such as temperature and precipitation. Among candidates, we found multiple genes putatively linked to key phenotypic adaptations to climate, including differences in body size (e.g., IGFPB) and plumage (e.g., MREG). These results are consistent with genetic constraints limiting the pathways of adaptation to broad climatic gradients, even after genetic backgrounds diverge.  more » « less
Award ID(s):
1655736
NSF-PAR ID:
10446647
Author(s) / Creator(s):
;
Date Published:
Journal Name:
Science advances
Volume:
9
Issue:
20
ISSN:
2375-2548
Format(s):
Medium: X
Sponsoring Org:
National Science Foundation
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