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.
27/Aug/2021
Rafael Nakamura Watanabe
, Guilherme Batista do Nascimento
, Priscila Arrigucci Bernardes
, Rebeka Magalhães da Costa
, Raysildo Barbosa Lôbo
, Fernando Baldi
, [...]
ABSTRACT The aim of this study was to evaluate genomic information inclusion in genetic parameter estimation of standardized body weight at birth and at 240, 365, and 450 days of age, and visual scores for body structure, precocity, and body muscularity, measured as yearlings in Nelore cattle. We compared genetic parameters, (co)variance components (estimated from Bayesian inference and Gibbs sampling), breeding value accuracies, genetic trends, and principal component analysis (PCA) obtained through traditional GBLUP and ssGBLUP methods. For all traits […]
Keywords: beef cattle; genetic parameters; genetic trends; growth traits; selection
22/Apr/2020
Ederson Gomes Camargo
, Daniele Botelho Diniz Marques
, Elsio Antonio Pereira de Figueiredo, Fabyano Fonseca e Silva
, Paulo Sávio Lopes
ABSTRACT We aimed to estimate litter size and litter uniformity genetic parameters and genetic trends of Landrace pigs at birth and at three weeks by using multitrait analyses for 2,787 litters. The following litter traits were evaluated: number of piglets born alive (NBA), within-litter weight mean at birth (MBW), within-litter weight standard deviation at birth (SDB), within-litter weight coefficient of variation at birth (CVB), number of piglets at three weeks (NT), within-litter weight mean at three weeks (MT), within-litter weight […]
Keywords: coefficient of variation; genetic parameters; genetic trends; piglet; variation
01/Nov/2008
Fernanda Fernandes Lourenço, Nelson José Laurino Dionello, Gil Carlos Rodrigo Medeiros, Valmir Costa da Rosa
DOI: 10.1590/S1516-35982008001100009
Data from 12.840 litters, recorded from 1989 to 2003, were used to evaluate genetic parameters and genetic trends of reproductive traits in Large White pigs. Data were provided by the Swine Breeders Brazilian Association – ABCS and included records on litter size at birth (NLN), litter size at 21 days (NLD), average litter weight at birth (PMNasc), litter weight at weaning adjusted to 21 days (PMD), average daily weight gain (GMD) and number of stillbirth (NatMort). Variance components were estimated […]
Keywords: direct and maternal genetic effects; genetic trends; litter size; litter weight; stillbirth
01/Dec/2000
Aldrin Vieira Pires, Paulo Sávio Lopes, Robledo de Almeida Torres, Ricardo Frederico Euclydes, Martinho de Almeida e Silva, André Ribeiro Corrêa da Costa
DOI: 10.1590/S1516-35982000000600014
Data of Duroc, Landrace and Large White swine were used to estimate genetic trends for maternal and direct genetic effects of litter size (TLN) and litter weight (PLN) born alive, litter size (TLD) and litter weight (PL21) at 21 days and mortality rate (TM). The genetic parameters were estimated by restricted maximum likelihood (REML) method. Estimated genetic direct and maternal trends were obtained by regressing genetic values averages on dam birth year. Estimated genetic direct trends showed no progress or […]
Keywords: BLUP; genetic trends; reproductive traits; swine