Candidate genes under selection in song sparrows co-vary with climate and body mass in support of Bergmann’s Rule

Author:

Carbeck KatherineORCID,Arcese PeterORCID,Lovette IrbyORCID,Pruett Christin,Winker Kevin,Walsh JenniferORCID

Abstract

AbstractEcogeographic rules denote spatial patterns in phenotype and environment that may reflect local adaptation as well as a species’ capacity to adapt to change. To identify genes underlying Bergmann’s Rule, which posits that spatial correlations of body mass and temperature reflect natural selection and local adaptation in endotherms, we compare 79 genomes from nine song sparrow (Melospiza melodia) subspecies that vary ~300% in body mass (17 − 50 g). Comparing large- and smaller-bodied subspecies revealed 9 candidate genes in three genomic regions associated with body mass. Further comparisons to the five smallest subspecies endemic to California revealed eight SNPs within four of the candidate genes (GARNL3, RALGPS1, ANGPTL2, and COL15A1) associated with body mass and varying as predicted by Bergmann’s Rule. Our results support the hypothesis that co-variation in environment, body mass and genotype reflect the influence of natural selection on local adaptation and a capacity for contemporary evolution in this diverse species.

Funder

University of British Columbia

Hesse Fellowship and Research Award

Canadian Network for Research and Innovation in Machining Technology, Natural Sciences and Engineering Research Council of Canada

Fuller Evolutionary Biology Lab

National Science Foundation

Publisher

Springer Science and Business Media LLC

Subject

General Physics and Astronomy,General Biochemistry, Genetics and Molecular Biology,General Chemistry,Multidisciplinary

Reference70 articles.

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