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/Jul/2001
Maria Norma Ribeiro, Edgard Cavalcanti Pimenta Filho, Gabrimar Araújo Martins, José Lindenberg Rocha Sarmento, Raimundo Martins Filho
DOI: 10.1590/S1516-35982001000500014
Weight records at 205 (205W), 365 (365W) and 550 (550W) days of age of three Nellore herds raised in Paraíba State from 1975 to 1990, were used in the analyses. Genetic and maternal effects were estimated with the restricted maximum likelihood method, assuming an animal model. There were included the fixed effects of year-month-sex and farm. The linear and quadratic effects of age of dam at calving were included in the model as covariables. The least squares means and respective […]
Keywords: genetic parameters; growth; Nellore cattle
01/Aug/1999
Stefano Biffani, Raimundo Martins Filho, Andrea Martini, Riccardo Bozzi, Francisco de Assis Melo Lima
DOI: 10.1590/S1516-35981999000400006
Growth records from Associação Brasileira de Criadores de Zebu (ABCZ), correspondent to a 2977 Nellore breed calves, born from 1976 to 1994 and raised on pasture in 11 herds from Piauí and Ceará states were analyzed to study the environmental factor effects and to estimate the heritability for the traits weight at 205 days of age (weaning weight). The mathematical model included the fixed effects of sex, year, season and herd of the birth, the covariant age of the dam […]
Keywords: corporal weight; heritability; Nellore cattle