Bayesian Analysis of Heterogeneous Residual Variance in Canine Behaviour

Abstract

Non-additive effects like for instance genotype-environment interactions and genetically structured heterogeneity of residual variance are notoriously dependent on scale: many statistical non-additive phenomena disappear after a careful choice of transformation of the phenotypic values. Particularly for behavioural measures, scale is a delicate matter. We present a novel Bayesian approach that assesses heterogeneity in environmental variance as a function of genetic effects, where the scale is defined by a psychometric model based on item-response theory. This makes analysis results independent of what items are in a particular test version. We apply the method to fearful behaviour in dogs and compare results with the more usual sum score approach.

Published in

Title: Proceedings of The 10th World Congress of Genetics Applied to Livestock Production
Publisher: WCGALP

Conference

10th World Congress of Genetics Applied to Livestock Production

SLU Authors

• Fikse, Freddy

  • Department of Animal Biosciences, Swedish University of Agricultural Sciences
    

UKÄ Subject classification

Genetics and Breeding in Agricultural Sciences

Permanent link to this page (URI)

https://res.slu.se/id/publ/66942