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Estimation of Genetic Parameters for Body Weight in Chinese Simmental Cattle Using Random Regression Model
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 Title & Authors
Estimation of Genetic Parameters for Body Weight in Chinese Simmental Cattle Using Random Regression Model
Yang, R.Q.; Ren, H.Y.; Xu, S.Z.; Pan, Y.C.;
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 Abstract
The random regression model methodology was applied into the estimation of genetic parameters for body weights in Chinese Simmental cattle to replace the traditional multiple trait models. The variance components were estimated using Gibbs sampling procedure on Bayesion theory. The data were extracted for Chinese Simmental cattle born during 1980 to 2000 from 6 national breeding farms, where records from 3 months to 36 months were only used in this study. A 3 orders Legendre polynomial was defined as the submodel to describe the general law of that body weight changing with months of age in population. The heritabilities of body weights from 3 months to 36 months varied between 0.31 and 0.48, where the heritabilities from 3 months to 12 months slightly decreased with months of age but ones from 13 months to 36 months increased with months of age. Specially, the heritabilities at eighteenth and twenty-fourth month of age were 0.33 and 0.36, respectively, which were slightly greater than 0.30 and 0.31 from multiple trait models. In addition, the genetic and phenotypic correlations between body weights at different month ages were also obtained using regression model.
 Keywords
Body Weight;Random Regression Model;Genetic Parameter;Chinese Simmental;
 Language
English
 Cited by
1.
Estimation of Covariance Functions for Growth of Angora Goats,;;;

Asian-Australasian Journal of Animal Sciences, 2009. vol.22. 7, pp.931-936 crossref(new window)
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