Non-additive genetic effects on weights and performance of a Brazilian Bos taurus x Bos indicus beef composite.
Genet Mol Res
; 7(4): 1156-63, 2008 Oct 28.
Article
em En
| MEDLINE
| ID: mdl-19048494
ABSTRACT
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).
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Base de dados:
MEDLINE
Assunto principal:
Peso Corporal
/
Cruzamentos Genéticos
/
Hibridização Genética
/
Carne
Limite:
Animals
País/Região como assunto:
America do sul
/
Brasil
Idioma:
En
Revista:
Genet Mol Res
Assunto da revista:
BIOLOGIA MOLECULAR
/
GENETICA
Ano de publicação:
2008
Tipo de documento:
Article
País de afiliação:
Brasil