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/2001
Cláudio Vieira de Araújo, Robledo de Almeida Torres, Cláudio Nápolis Costa, Paulo Sávio Lopes, Carmen Silva Pereira, Ricardo Frederico Euclydes, [...]
DOI: 10.1590/S1516-35982001000400012
Milk yield adjusted for 305 days and for age of Holtein cows were used to verify the effectiveness of including sire-by-herd interaction in the model of analysis as an adjustment factor for heterogeneous variances between herds. The herds were classified in three classes of phenotypic standard deviation: high, medium and low. Variance component estimates were obtained by Restricted Maximum Likelihood methodology, for classes of phenotypic standard deviation, considering each one as a different trait, using a multiple trait analysis. Two […]
Keywords: milk yield; sire by herd interaction; variance components
01/Feb/2000
DOI: 10.1590/S1516-35982000000100013
ABSTRACT – Estimates of variance, covariance and heritabilities (h2) for body weights at birth (y1), weaning (y2), 12 (y3), 18 (y4) and 24 (y5) months of age, and scrotal circumference at 12 months of age (y6) were obtained from three data sets of purebreed Canchim males and females, born from 1961 to 1969 in São Carlos, São Paulo State. The genetic parameters were obtained by means of univariate analysis by Henderson Method 3, Maximum Likelihood (ML), Restricted ML (REML), Iterative […]
Keywords: beef cattle; estimation methods; variance components