2013
DOI: 10.5216/cab.v14i2.13571
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Efeito De Diferentes Modelos Sobre as Estimativas De (Co)variâncias E Parâmetros Genéticos Para Pesos Até a Desmama Em Gado Nelore

Abstract: We used actual and adjusted weights to 120 d and 210 d of age of 72,731 male and female Nellore calves born in 40 PMGRN -Nellore Brazil herds from 1985 to 2005 aiming to compare the effect of different definitions of contemporary groups on estimates of (co)variance and genetic parameters. Four models, each one with a different structure of contemporary group (CG), were compared using the Akaike Information Criterion (AIC), the Bayesian Information Criterion (BIC), and the Consistent Akaike Information Criterio… Show more

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“…In this sense, the results coincide with those of Pascoa et al (2013), who pointed out in a study carried out in Nelore cattle, that the models that included the effect of the sex of the offspring as a random effect separated from the CG were much better. Further, in those that the CG was the concatenation of herd, year and time of birth, the best data fit was found.…”
Section: Resultssupporting
confidence: 88%
“…In this sense, the results coincide with those of Pascoa et al (2013), who pointed out in a study carried out in Nelore cattle, that the models that included the effect of the sex of the offspring as a random effect separated from the CG were much better. Further, in those that the CG was the concatenation of herd, year and time of birth, the best data fit was found.…”
Section: Resultssupporting
confidence: 88%