Veterinary and Animal Sciences
Turkish Journal of Veterinary and Animal SciencesEstimates of (co) variance components for direct and maternal effects on birth weight of Karacabey Merino lambs
1Department of Animal Science, Faculty of Agriculture, Uludaš University, 16059 Bursa - TURKEY
2Animal Husbandry and Health Program, Karacabey Vocational School, Uludaš University, Karacabey,
Bursa - TURKEY
Abstract: The aim of the present study was to estimate (co) variance components for birth weights of Karacabey Merino lambs. The model fitted included direct genetic, maternal genetic, and direct-maternal genetic covariance and maternal permanent environmental effects. Data and pedigree information of the Karacabey Merino sheep used in this study were collected at the Marmara Animal Breeding Research Institute from 1998 to 2002. Variance components for birth weights were estimated by the MTDFREML. A direct heritability estimate of 0.08 and a maternal heritability estimate of 0.05 were obtained for birth weight. The maternal permanent environmental effect was significant. The estimate of the direct-maternal genetic correlation was found high and negative. In conclusion, maternal effects on birth weight of Karacabey Merino lambs were significant and need to be considered in any selection program undertaken in this breed.
Key Words: Karacabey Merino lambs, genetic parameters, birth weight
Turk. J. Vet. Anim. Sci. 2009; 33: 235-240.
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Other articles published in the same issue: Turk. J. Vet. Anim. Sci.,vol.33,iss.3.