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5 - Genetics of dog behavior

from PART II - BEHAVIOR, COGNITION AND TRAINING

Published online by Cambridge University Press:  30 December 2016

By
Linda van den Berg
Edited by
James Serpell
Linda van den Berg
Affiliation:
Rotterdam, the Netherlands
James Serpell
Affiliation:
University of Pennsylvania
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Summary

Introduction

Selection for behavior has played a key role in the history of dog domestication and breeding. Early dog domestication probably involved selection for tameness. A few generations of selection for tameness in the famous Russian silver fox experiments led to a domesticated strain of foxes that showed dog-like behavior and displayed curly tails, drop ears, and loss of pigment (Trut et al., 2009). The early domestication of dogs was followed by the formation of dog breeds. Different aspects of ancestral wolf behavior have been selected for in different breeds: dogs have been bred to guard, herd, hunt, pull sleds, and to provide companionship. Selection for physical appearance became more important at a later stage when people began breeding dogs for show. Extreme population bottlenecks, founder effects, drift and strong artificial selection for desired traits during breed formation have resulted in a dog population that is a collection of genetic isolates with highly diverging morphology, disease susceptibility, and behavioral characteristics (Sutter & Ostrander, 2004).

Scott and Fuller (1965) performed a pioneering study of breed differences and inheritance of canine behavior. Their experiment involved dogs of five breeds: basenji, beagle, American cocker spaniel, Shetland sheepdog and wire-haired fox terrier. Breeds and their crosses were compared for reactivity, trainability and problem-solving behaviors. Scott and Fuller observed behavioral differences between the breeds in the majority of their behavioral tests; for instance, in playful aggression and dominance. Wire-haired fox terriers were the most aggressive, consistently “ganging up” on group members. These attacks were so serious that victims had to be removed in order to prevent serious injury. More recently, Svartberg (2006) compared the behavior of 31 dog breeds using data from a standard behavioral test. Significant breed differences were observed for all investigated traits (Figure 5.1). Dog breeds also differ in the prevalence of problem behavior. For instance, certain breeds are predisposed to obsessive-compulsive behaviors: bull terriers frequently exhibit tail chasing, while Doberman pinschers are prone to acral licking.

The fact that breed differences in behavior exist, and that behavioral dispositions can be selected for, suggests that there is a genetic basis for behavior. Behavioral genetics is the study of the individual variation in behavior due to genetic differences between animals. Behavioral genetic studies in dogs have traditionally been studies of breed differences, selection studies, and population-based heritability studies.

Type
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The Domestic Dog
Its Evolution, Behavior and Interactions with People
 , pp. 69 - 92
Publisher: Cambridge University Press
Print publication year: 2016

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