Inheritance of the birth weights in crosses between Istrian, Awassi, East-Friesian and Travnik Pramenka sheep in Croatia: a case study

The purpose of the study was to estimate influence additive and non-additive genetic effects on birth weight, using two different crossbreed models. Data 1176 weights were collected. animals crosses, with ratios Awassi, East-Friesian, Istrian, Travnik Pramenka sheep breed. focal breed in this which is an autochthonous Croatia. In both models mixed procedure used random effect sire fixed sex, year month birth, litter size, direct inbreeding. first model contained effects, while second additionally included heterosis recombination loss. Sex, significantly affected weight Effect inbreeding negative significant only model. Significant positive estimated for Awassi East-Friesian models, but it one only. crosses between Pramenka, as well Istrian Same showed loss