Sammanfattning

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.

Publicerad i

Titel: Proceedings of The 10th World Congress of Genetics Applied to Livestock Production
Utgivare: WCGALP

Konferens

10th World Congress of Genetics Applied to Livestock Production

SLU författare

• Fikse, Freddy

  • Institutionen för husdjurens biovetenskaper, Sveriges lantbruksuniversitet
    

UKÄ forskningsämne

Genetik och förädling


Permanent länk till denna sida (URI)

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