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/S1516-35982005000300013
Two different preweaning selection criteria in Gyr cattle: average daily gain from birth to weaning (ADG) and number of days to gain 160 kg from birth to weaning (D160) were evaluated in this study. Records from the Brazilian Zebu Breeders Association obtained from 1978 to 1994, were studied. (Co)variance components and heritabilities were estimated by restricted maximum likelihood derivative free method, and expected breeding values (EBV) were predicted using an single trait animal model. In the model, contemporary group was […]
Keywords: average daily gain; days to gain 160 kg; genetic parameters; harmonic mean
Dionéia Magda Everling, Gilka Berenice Barbosa Ferreira, Paulo Roberto Nogara Rorato, Vanerlei Mosaquatro Roso, Angelo Elias Marion, Henrique Dornelles Fernandes
01/Dec/2001
Dionéia Magda Everling, Gilka Berenice Barbosa Ferreira, Paulo Roberto Nogara Rorato, Vanerlei Mosaquatro Roso, Angelo Elias Marion, Henrique Dornelles Fernandes
DOI: 10.1590/S1516-35982001000800007
The data utilized in this work were originated from 53.938 pure and crossbred (Angus x Nelore), collected in different regions of Brazil and Argentina born from 1987 to 1998 were analyzed. The objectives of this work were to verity the heritabilities and correlation among the growing and scrotal circumference traits. The variables analyzed were the average daily gain from birth to weaning (ADGBW), days to reach 160 kg from birth to weaning (D160), weaning weight (WW) and scrotal circumference at […]
Keywords: animal model; average daily gain; days to gain 160 kg; maximum likelihood; weaning weight