Resumo
Abstract: Records on birth weight (BW) and standardized to 210 (P210), 365 (P365) and 550 (550) days of age in Nellore breed, with the goal of predicting breeding values of sires. The model included fixed effects of contemporary group and age of calving as a covariate, and random effects of genetic additive direct and additive maternal, maternal permanent environmental and temporary environment. Estimates of means and standard deviations for PN, P210, P365 and P550 were equal to 32.76 3.74, 184.30 29.02, 240.31 41.85 and 322.12 60.77, respectively. Estimated values of heritability for P210, P365 and P550 were equal to 037, 0.36, 0.38 and 031, respectively. Genetic correlations between birth weight and other weights were of low magnitude, with high values of the weights at other ages. The use of sires with high genetic values for the total maternal effect, and allows players to choose more positive for weaning weight also allows the choice of breeding more positive for the year and yearling weights.
Keywords: Nellore, Genetic Parameters, Animal Science
Referências
- BOLINGON, A.A.; ALBUQUERQUE, L.G.; MERCADANTE, M.E.Z.; LO, R.B.; Herdabilidades e correlações entre pesos do nascimento idade adulta em rebanhos da raça Nelore. Revista Brasileira de Zootecnia, v.38, n.12, p.2320-2326, 2009.
- ELER, J.P. et al. Estimation of variances due to direct and maternal effects for growth traits of Nelore cattle. Journal Animal Science, v.73, n.11, p.3253-8, 1995.
- GARNERO, A. V.; LO. R. B.; BEZERRA, L. A. F.; OLIVEIRA, H. N. Comparação entre Alguns Critérios de Seleção para Crescimento na Raça Nelore. Revista Brasileira de Zootecnia, v.30, n.3, p.714-718, 2001.
- YOKOO, M.J.I.; ALBUQUERQUE, L.G.; LO, R.B.; SAINZ, R.D.; CARNEIRO JIOR, J.M.; BEZERRA, L. A. F.; ARAO, F. R. C. Estimativas de parâmetros genéticos para altura do posterior, peso e circunferência escrotal em bovinos da raça Nelore. Revista Brasileira de Zootecnia, v.36, n.6, p.1761-1768, 2007.