Estimation of genetic parameters for number of teats in pigs | Ocena genetskih parametrov za stevilo seskov pri prasicih
2010
Malovrh, S., Ljubljana Univ. (Slovenia). Biotechnical Fac., Zootechnical Dept. | Kovac, M.
Dispersion parameters were estimated on records for teat number collected on family farms. Number of teats is recorded at birth and at test. Data file included records from years 2006 - 2009. Altogether, 12584 records at birth and 3294 records at test were analysed. The pedigree file covered 14661 animals. Seven genotypes were included. Covariance components were estimated by statistical package VCE6. Two-trait mixed model was applied. The statistical model included genotype, season as year-month interaction as fixed effects and direct additive genetic effect and common litter environment as random effects. Estimated heritability had value 0.33 at birth and 0.32 at test. Genetic correlation between traits was high (0.98). Variance proportion for common litter environment was 0.07 for both traits. The number of teats at test will be included among selection criteria.
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