Random Regression Model for Estimation the Genetic Parameters for Growth Traits in Charolais Breed
Keywords:
cattle, body weight, selection, heritabilityAbstract
The aim of this study was the estimation the genetic parameters with random regression model for growth traits in Charolais cattle breed. The records were the body weight at birth, 200 and 365 days. The pedigree consisted in 2213 cattle: 159 sires, 1025 dams and 1029 cattle with records. The data were from Romanian Breeding Association for beef cattle. The mean for birth weight was 40.297±0.202 kg, for weaning weight was 220.287±1.296 kg, and the mean for weight at 365 days was 330.275±2.097 kg. The heritability for the birth weight and body weight at 200 and 365 days was 0.244, 0.519, 0.561. The genetic correlations between body weight at 1, 200 and 365 days were positive. The random regression model was adequate to estimate the genetic parameters for growth traits in Charolais beef cattle breed. For increase the profitability of farms it is necessary to improve the growth traits.
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