Abstract: Disclosed herein is early genetic screening to aid in the selection of dogs for assistance training programs. Disclosed methods include a method for predicting the probability of canine success in a training program, involving genotyping a biological sample from a canine; determining at least one mobile element insertion copy number within the Williams-Beuren Syndrome (WBS) locus on canine chromosome 6; and predicting the probability of the canine's success in a training program based on the at least one mobile element insertion copy number. Another disclosed method is a method of producing dogs that are more likely to exhibit a sociable behavior, involving providing a male and female dog for breeding; determining at least one mobile element insertion copy number within the Williams-Beuren Syndrome (WBS) locus on canine chromosome 6 for each of the provided dogs; and mating the dogs of step (a) to produce offspring.

Abstract: Disclosed herein are structural variants in the Williams-Beuren Syndrome locuse of the dog genome that are associated with hyper-social behavior in dogs relative to wolves, and that are informative regarding the nature of social behavior in dogs. Disclosed also is a commercial test with these loci as indicators along the spectrum of sociality. Methods of breeding dogs to select for dogs having increased sociability are also disclosed.