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/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
01/May/1999
Stefano Biffani, Raimundo Martins Filho, Alessandro Giorgetti, Riccardo Bozzi, Francisco de Assis Melo Lima
DOI: 10.1590/S1516-35981999000300005
Data growth records relative to 2004 Nellore breed calves, from Ceará and Piauí states, were used to study the influence of environmental effects and to estimate the heritability of the weight traits at the 365 days (yearling) and 550 days (post-yearling) of age. The variance components were estimated by the restricted maximum likelihood method. In the analysis of variance a model that included the fixed effects of sex, year and season and herd of birth, and the age of dam […]
Keywords: corporal weight; genetic correlation; heritability