ESTIMATION OF GENETIC PARAMETERS FOR PRODUCTION TRAITS IN PIG BREEDS IN CROATIA
2015
Anamarija Smetko | Dubravko Škorput | Zoran Luković | Željko Mahnet | Vedran Klišanić | Marija Špehar
Genetic parameters for backfat thickness and test time were updated and used in genetic evaluation for field tested pigs in Croatia. Data consisted of 9,406 animals with measurements for production traits recorded from 2000 to 2014. The number of animals in pedigree was 10,728. Production traits were modelled using a single trait animal model including the following fixed class effects: breed, sex, classifier, season, and herd. Weight at the end of the test was included as linear regression in the model for backfat. Direct additive genetic effect, interaction herd-year-season of testing and common litter effect were included as random effects. Variance components were estimated using REML method as implemented in the VCE-6 program. The estimated heritabilities were 0.28±0.03 for backfat thickness and 0.12±0.02 for test time. Litter effect accounted from 15 to 24% of phenotypic variation, while herd-year-season of testing explained additional 24 and 28% of variability for analysed traits.
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