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.
21/Jul/2023
Isabella Silva de Carvalho
, Sirlene Fernandes Lázaro
, Gabriela Stefani
, Alessandra Alves Silva
, Karina Rosa da Silveira
, Daiane Cristina Becker Scalez
, [...]
ABSTRACT The objectives of this work were to estimate the genetic parameters for the traits longevity (LG) and accumulated milk yield at 305 days (MY305) using a bitrait animal model and the single-step GBLUP method and estimate the genetic gain for LG through direct and indirect selection for MY305. We used 4,057 records of first lactations of Murrah dairy buffaloes, collected between 1987 and 2020, belonging to six Brazilian herds located in the states Ceará, Rio Grande do Norte, and […]
Keywords: correlated response; genetic gain; genetic trend; genomic prediction; Murrah
01/Jul/2001
Marcos Vinícius Gualberto Barbosa da Silva, Jaime Araujo Cobuci, William José Ferreira, Guilherme Paes Guaragna, Paulo Rogério Palma de Oliveira
DOI: 10.1590/S1516-35982001000500015
The objective of this work was to estimate the genetic parameters, product-moment and rank correlations between breeding values, and also correlated responses for reproductive traits using bivariate analysis of total milk production (PL) and the age at the first calving (IPP), or calving intervals (IDP), or days open (PSERV). Records from the NPZGJRA/IZ/APTA/SAA-SSP breeding program of the first five lactations of 1406 cows of Mantiqueira ecotype; daughters of 113 sires, with calvings from 1952 to 1997 were used. The MTDFREML […]
Keywords: animal model; correlated response; dairy cattle; Mantiqueira ecotype; rank correlation; REML methodology