Non-additive genetic effects on weights and performance of a Brazilian Bos taurus x Bos indicus beef composite
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Data
2008-01-01
Autores
Mourao, G. B.
Ferraz, J. B. S.
Eler, J. P.
Bueno, R. S.
Balieiro, J. C. C.
Mattos, E. C.
Figueiredo, L. G. G. [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Funpec-editora
Resumo
The aim of the present study was to evaluate the heterosis effects on weaning weight at 205 days (WW, N = 146,464), yearling weight at 390 days (YW, N = 69,315) and weight gain from weaning to yearling (WG, N = 59,307) in composite beef cattle. The fixed models were: RM, which included contemporary groups, class of age of dam, outcrossing percentages for direct and maternal effects, and additive direct and maternal ( AM) breed effects; R, RM model, minus AM breed effects, and H, RM model, minus additive breed effects. The estimates for W205 were in general positive (P < 0.01). The R and H models resulted in similar estimates, but they were very different from the ones estimated by the RM model. For W390, the R and H models resulted in general positive estimates (P < 0.05). For WG, the RM model resulted in general significant heterosis effects (P < 0.05). It can be concluded that the RM model seems to supply estimates of better quality (P < 0.01).
Descrição
Palavras-chave
Beef cattle, Crossbreeding, Heterosis, Performance
Como citar
Genetics and Molecular Research. Ribeirao Preto: Funpec-editora, v. 7, n. 4, p. 1156-1163, 2008.