Ancestry-inclusive dog genomics challenges popular breed stereotypes

Kathleen Morrill, Jessica Hekman, Xue Li, Jesse McClure, Brittney Logan, Linda Goodman, Mingshi Gao, Yinan Dong, Marjie Alonso, Elena Carmichael, Noah Snyder-Mackler, Jacob Alonso, Hyun Ji Noh, Jeremy Johnson, Michele Koltookian, Charlie Lieu, Kate Megquier, Ross Swofford, Jason Turner-Maier, Michelle E. WhiteZhiping Weng, Andrés Colubri, Diane P. Genereux, Kathryn A. Lord, Elinor K. Karlsson

Research output: Contribution to journalArticlepeer-review

Abstract

Behavioral genetics in dogs has focused on modern breeds, which are isolated subgroups with distinctive physical and, purportedly, behavioral characteristics. We interrogated breed stereotypes by surveying owners of 18,385 purebred and mixed-breed dogs and genotyping 2155 dogs. Most behavioral traits are heritable [heritability (h2) > 25%], and admixture patterns in mixed-breed dogs reveal breed propensities. Breed explains just 9% of behavioral variation in individuals. Genome-wide association analyses identify 11 loci that are significantly associated with behavior, and characteristic breed behaviors exhibit genetic complexity. Behavioral loci are not unusually differentiated in breeds, but breed propensities align, albeit weakly, with ancestral function. We propose that behaviors perceived as characteristic of modern breeds derive from thousands of years of polygenic adaptation that predates breed formation, with modern breeds distinguished primarily by aesthetic traits.

Original languageEnglish (US)
Article numbereabk0639
JournalScience
Volume376
Issue number6592
DOIs
StatePublished - Apr 29 2022
Externally publishedYes

ASJC Scopus subject areas

  • General

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