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.
31/Jan/2024
Juliana Salies Souza
, Daniel Duarte da Silveira
, Bruno Borges Machado Teixeira
, Arione Augusti Boligon
ABSTRACT Data from 83,088 Hereford and Braford cattle were used to compare parameters and breeding values obtained using linear and threshold models for visual scores of limb conformation (LCW and LCY), breed traits (BTW and BTY), sexual traits (STW and STY), eye pigmentation (EPW and EPY), and navel size (NSW and NSY) at weaning and yearling, respectively. Additionally, principal component analysis was applied to investigate the relationship among the estimated breeding values. Higher direct heritability were estimated using the threshold […]
Keywords: heritability; linear model; morphological traits; principal components; rank correlation; threshold model
01/Apr/2004
Maria Eugênia Zerlotti Mercadante, Alexander George Razook, Joslaine Noely dos Santos Gonçalves Cyrillo, Leopoldo Andrade de Figueiredo
DOI: 10.1590/S1516-35982004000200010
Records of 1021 Nelore cows were analyzed in order to evaluate the effect of selection for growth on their stayability in the herd up to five years, considering that they were selected (P5|S). The coded variable (0=culled and 1=not culled) was analyzed with a threshold model. The Nelore cows were born from 1981 to 1997 within the selected (NeS and NeT) and control (NeC) lines of the Experimental Station of Sertãozinho (SP-Brazil). In NeS and NeT the selected (replacement) animals […]
Keywords: beef cattle; body weight; selection experiment; stayability of cows; threshold model
01/Jun/2003
Josineudson Augusto II de Vasconcelos Silva, Joanir Pereira Eler, José Bento Sterman Ferraz, Henrique Nunes de Oliveira
DOI: 10.1590/S1516-35982003000300011
The purpose of this study was to analyse of the stayability trait (STAY) of Nelore cows. Stayability was defined as the probability of calving at a specific age, or after that age, given that the cow calved at least one time prior to that age. The study focused specifically on six year old groups, and the information corresponding to 55,682 animals were analysed. The data were analysed based on an a posteriori maximum threshold model to predict the genetic values, […]
Keywords: bayesian inference; reproductive trait; threshold model