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/Oct/2001
Marcos Vinícius Gualberto Barbosa da Silva, William José Ferreira, Jaime Araujo Cobuci, Guilherme Paes Guaragna, Paulo Rogério Palma de Oliveira
DOI: 10.1590/S1516-35982001000600013
The data used in this study are from the first five lactations of 1,406 cows of the Mantiqueira Ecotype, daughters of 113 sires, with calving from 1952 to 1997. The total milk yield (PL), fat production (PG), lactation period (DL), and days dry (PS) were obtained from NPZGJRA/IZ/APTA/SAA. Based on the genetic values predictions, for each studied feature selection differentials and genetic trends were estimated though four selection paths of selection: bulls to breed bulls (SB), cows to breed bulls […]
Keywords: animal model; dairy cattle; genetic trend; Mantiqueira ecotype; REML methodology; selection differential
01/Apr/2001
André Ribeiro Corrêa da Costa, Paulo Sávio Lopes, Robledo de Almeida Torres, Ricardo Frederico Euclydes, Adair José Regazzi, Martinho de Almeida e Silva, [...]
DOI: 10.1590/S1516-35982001000200008
Data of Large White (LW), Landrace (LD) and Duroc (DU) swine were used to estimate the genetic trends for adjusted weight at 70-days old (AW70) in kg, average daily gain (ADG) in g and backfat thickness (BT) in cm. The genetic trends were estimated by regression of the averages of trait genetic values in function of the animal birth year. The estimates of the genetic trend for AW70 (LW = -0.22; LD = -0.24; DU = -0.57) were negative, possibly […]
Keywords: BLUP; genetic trend; swine
Joslaine Noely dos Santos Gonçalves Cyrillo, Alexander George Razook, Leopoldo Andrade de Figueiredo, Luiz Martins Bonilha Neto, Maria Eugênia Zerlotti Mercadante, Humberto Tonhati
01/Feb/2001
Joslaine Noely dos Santos Gonçalves Cyrillo, Alexander George Razook, Leopoldo Andrade de Figueiredo, Luiz Martins Bonilha Neto, Maria Eugênia Zerlotti Mercadante, Humberto Tonhati
DOI: 10.1590/S1516-35982001000100010
The objectives of this study were to estimate the genetic trends and also the genetic and phenotypic parameters for body weight at 378 days (W378), body measurements and scrotal circumferences of Nellore males from selected and control populations of the Estação Experimental de Zootecnia de Sertãozinho (SP), Brazil. The heritability estimates, considering sire and animal model were, respectively, 0.53± 0.12 and 0.36 for W378 days; 0.38±0.11 and 0.58 for hip height; 0.31±0.10 and 0.10 for chest girth; 0.40± 0.11 and […]
Keywords: body measurements; genetic parameters; genetic trend; post-weaning weight; scrotal circumference