Models for genetic evaluation of Nelore cattle mature body weight


Autoria(s): Boligon, A. A.; Albuquerque, Lucia Galvão de; Mercadante, M. E. Z.; Lobo, R. B.
Contribuinte(s)

Universidade Estadual Paulista (UNESP)

Data(s)

20/05/2014

20/05/2014

01/11/2008

Resumo

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Records of 18,770 Nelore animals, born from 1975 to 2002, in 8 herds participating in the Nelore Cattle Breeding Program, were analyzed to estimate genetic parameters for mature BW. The mature BW were analyzed as a single BW taken closest to 4.5 yr of age for each cow in the data file, considering BW starting from 2 (W2Y_S), 3 (W3Y_S), or 4 (W4Y_S) yr of age or as repeated records, including all BW starting from 2 (W2Y_R), 3 (W3Y_R), or 4 (W4Y_R) yr of age. The variance components were estimated by restricted maximum likelihood, fitting univariate and bivariate animal models, including weaning weight. The heritability estimates were 0.29, 0.34, 0.36, 0.41, 0.44, and 0.46 for W2Y_S, W3Y_S, W4Y_S, W2Y_R, W3Y_R, and W4Y_R, respectively. The repeatability estimates for W2Y_R, W3Y_R, and W4Y_R were 0.59, 0.64, and 0.72, respectively. Larger accuracy values associated with the EBV were obtained in the repeated records models. The results indicated the bivariate repeated records model as the most appropriate for analyzing mature BW.

Formato

2840-2844

Identificador

http://dx.doi.org/10.2527/jas.2007-0823

Journal of Animal Science. Savoy: Amer Soc Animal Science, v. 86, n. 11, p. 2840-2844, 2008.

0021-8812

http://hdl.handle.net/11449/4492

10.2527/jas.2007-0823

WOS:000260425000003

Idioma(s)

eng

Publicador

Amer Soc Animal Science

Relação

Journal of Animal Science

Direitos

closedAccess

Palavras-Chave #Beef cattle #Genetic correlation #Growth #repeatability
Tipo

info:eu-repo/semantics/article