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Research at St Andrews

Breed differences in dog cognition associated with brain-expressed genes and neurological functions

Research output: Contribution to journalArticlepeer-review

DOI

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  • Embargoed (until 29/07/21)

Author(s)

Gitanjali E. Gnanadesiken, Brian Hare, Noah Snyder-Mackler, Josep Call, Juliane Kaminski, Ádám Miklósi, Evan L. MacLean

School/Research organisations

Abstract

Given their remarkable phenotypic diversity, dogs present a unique opportunity for investigating the genetic bases of cognitive and behavioral traits. Our previous work demonstrated that genetic relatedness among breeds accounts for a substantial portion of variation in dog cognition. Here, we investigated the genetic architecture of breed differences in cognition, seeking to identify genes that contribute to variation in cognitive phenotypes. To do so, we combined cognitive data from the citizen science project Dognition.com with published breed-average genetic polymorphism data, resulting in a dataset of 1654 individuals with cognitive phenotypes representing 49 breeds. We conducted a breed-average genome-wide association study to identify specific polymorphisms associated with breed differences in inhibitory control, communication, memory, and physical reasoning. We found five single nucleotide polymorphisms (SNPs) that reached genome-wide significance after Bonferroni correction, located in EML1, OR52E2, HS3ST5, a U6 spliceosomal RNA, and a long non-coding RNA. When we combined results across multiple SNPs within the same gene, we identified 188 genes implicated in breed differences in cognition. This gene set included more genes than expected by chance that were 1) differentially expressed in brain tissue and 2) involved in nervous system functions including peripheral nervous system development, Wnt signaling, presynapse assembly, and synaptic vesicle exocytosis. These results advance our understanding of the genetic underpinnings of complex cognitive phenotypes and identify specific genetic variants for further research.
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Details

Original languageEnglish
Article numbericaa112
JournalIntegrative and Comparative Biology
VolumeIn press
Early online date29 Jul 2020
DOIs
Publication statusE-pub ahead of print - 29 Jul 2020

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