RT Journal Article
SR Electronic
T1 Genomic signature of kin selection in an ant with obligately sterile workers
JF bioRxiv
FD Cold Spring Harbor Laboratory
SP 072496
DO 10.1101/072496
A1 Michael R. Warner
A1 Alexander S. Mikheyev
A1 Timothy A. Linksvayer
YR 2016
UL http://biorxiv.org/content/early/2016/08/31/072496.abstract
AB Kin selection is thought to drive the evolution of cooperation and conflict, but the specific genes and genome-wide patterns shaped by kin selection are unknown. We identified thousands of genes associated with the sterile ant worker caste, the archetype of an altruistic phenotype shaped by kin selection, and then used population and comparative genomic approaches to study patterns of molecular evolution at these genes. Consistent with population genetic theoretical predictions, worker-upregulated genes showed relaxed adaptive evolution compared to genes upregulated in reproductive castes. Worker-upregulated genes included more taxonomically-restricted genes, indicating that the worker caste has recruited more novel genes, yet these genes also showed relaxed selection. Our study identifies a putative genomic signature of kin selection and helps to integrate emerging sociogenomic data with longstanding social evolution theory.