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Estimation of genetic parameters of preweaning performance in the French Limousin cattle breed

, : Estimation of genetic parameters of preweaning performance in the French Limousin cattle breed. Genetics Selection Evolution (Paris) 25(2): 177-189

Direct and maternal genetic and environmental parameters of preweaning growth and conformation at weaning were estimated in the French Limousin beef cattle field recording program using the tilde-hat approach of Van Raden and Jung (1988) with a sire, maternal grandsire (MGS) and dam within MGS model. The numerator relationship matrix among bulls was included in the estimation. The data available after editing contained 169,391 calves with performance records, from 43,683 dams, 7265 sires, 5664 maternal grandsires and 1 605 herds, for the years 1972-1989. The traits involved were: birth, 120-d and 210-d weights, average daily gains from birth to 120-d, from 120-d to 210-d, from birth to 210-d, muscular development (MD) and skeletal development (SD) scores at weaning. Estimates ranged from 0.22 to 0.32 for additive direct heritabilities and from 0.06 to 0.16 for maternal heritabilities. Correlations between direct and maternal genetic effects for these traits were negative, ranging from -0.23 to -0.49. Maternal permanent environmental effects were small for all traits, accounting for 5-9% of the phenotypic variances for preweaning growth performance, and 3% and 4% for MD and SD, respectively.

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Accession: 002373232

DOI: 10.1186/1297-9686-25-2-177

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