The Revista Brasileira de Zootecnia (RBZ) is a publication dedicated to the broad field of Animal Science. We publish high-quality, original scientific research that spans across diverse areas within the discipline. The scope of RBZ encompasses a wide range of topics, including aquaculture, biometeorology and animal welfare, forage crops and grasslands, animal and forage plants breeding and genetics, animal reproduction, ruminant and non-ruminant nutrition, meat science and muscle biology, precision livestock, and animal production systems and agribusiness.
The Revista Brasileira de Zootecnia (RBZ) is a publication dedicated to the broad field of Animal Science. We publish high-quality, original scientific research that spans across diverse areas within the discipline. The scope of RBZ encompasses a wide range of topics, including aquaculture, biometeorology and animal welfare, forage crops and grasslands, animal and forage plants breeding and genetics, animal reproduction, ruminant and non-ruminant nutrition, meat science and muscle biology, precision livestock, and animal production systems and agribusiness.
The Revista Brasileira de Zootecnia (RBZ) is a publication dedicated to the broad field of Animal Science. We publish high-quality, original scientific research that spans across diverse areas within the discipline. The scope of RBZ encompasses a wide range of topics, including aquaculture, biometeorology and animal welfare, forage crops and grasslands, animal and forage plants breeding and genetics, animal reproduction, ruminant and non-ruminant nutrition, meat science and muscle biology, precision livestock, and animal production systems and agribusiness.
01/Jun/2005
Carolina Amália de Souza Dantas Muniz, Roberto Carvalheiro, Luiz Alberto Fries, Sandra Aidar de Queiroz
DOI: 10.1590/S1516-35982005000300012
A data set with 16,592 records from the Brazilian Zebu Breeders Association obtained from 1978 to 1994, was used to estimate genetic parameters for preweaning average daily gain (ADG) and number of days to gain 160 kg (D160) in Gyr cattle. The (co)variance components and heritabilities were estimated by the restricted maximum likelihood derivative free method. Two models were used: the first one considered contemporary group (CG) as fixed effect and additive direct and maternal genetic effects, maternal permanent environment […]
Keywords: average daily gain from birth to weaning; days to gain 160 kg from birth to weaning; direct heritability; direct- maternal genetic correlation; maternal heritability