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The Other End of the Leash: An Experimental Test to Analyze How Owners Interact with Their Pet Dogs
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Highly heritable and functionally relevant breed differences in dog behaviour.

Evan L MacLean1,2, Noah Snyder-Mackler3,4,5, Bridgett M vonHoldt6

  • 1School of Anthropology, University of Arizona, Tucson, AZ, USA.

Proceedings. Biological Sciences
|October 3, 2019
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Summary
This summary is machine-generated.

Dog breed variations reveal high heritability for 14 complex behaviors. Genetic analysis identified specific DNA markers linked to these behavioral differences, offering insights into their evolution.

Keywords:
behaviourbreeddogevolutiongeneticsheritability

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Area of Science:

  • Genetics
  • Animal Behavior
  • Evolutionary Biology

Background:

  • Dog breeds exhibit significant behavioral variation, providing a model for studying complex traits.
  • Understanding the genetic underpinnings of behavior is crucial for both animal welfare and human neuroscience.

Purpose of the Study:

  • To investigate the heritability and genetic basis of complex behavioral traits across diverse dog breeds.
  • To identify specific genetic loci associated with behavioral differences in dogs.

Main Methods:

  • Integrated behavioral data from over 14,000 dogs across 101 breeds.
  • Utilized breed-averaged genotypic data from over 100,000 genomic loci.
  • Performed quantitative genetic analyses to estimate heritability and identify associated single nucleotide polymorphisms (SNPs).

Main Results:

  • High among-breed heritability was observed for 14 distinct behavioral traits.
  • Identified 131 SNPs associated with breed-specific behavioral differences.
  • Associated genes are highly expressed in the brain and enriched for neurobiological and developmental functions.

Conclusions:

  • Dog breed variation offers a powerful model for studying the evolution of complex behaviors.
  • Genetic factors play a significant role in the behavioral differences observed among dog breeds.
  • Identified genes provide potential targets for understanding the biological basis of behavior.