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.
05/Jul/2019
André Rabelo Fernandes
, Lenira El Faro
, Anibal Eugênio Vercesi Filho, Carlos Henrique Cavallari Machado, Leandro Martins Barbero, Eustáquio Resende Bittar, [...]
ABSTRACT The objective of this study was to analyze the genetic evolution of milk production, udder morphology, and animal behavior of Gir dairy cattle. Data were obtained on the predicted breeding values for milk yield of 60,226 cows born from 1968 to 2015 and standardized predicted breeding values for udder conformation and milking behavior of 7,635 cows born from 1987 to 2015. The influence of tested bulls on genetic trends was discussed, with special focus on the period after 1993, […]
Keywords: linear traits; mammary system; reactivity; teat morphology; udder attachment
01/Jun/2008
Anita Schmidek, Maria Eugênia Zerlotti Mercadante, Mateus José Rodrigues Paranhos da Costa, Alexander George Razook, Leopoldo Andrade de Figueiredo
DOI: 10.1590/S1516-35982008000600007
This study aimed to evaluate the effects related to the high occurrence (18%) of Guzerá newborn calves that failed to suckle (FS) after birth. Data from 1527 births recorded from 1992 to 2004 were analyzed by a fixed effects model using the probit linking function with the GENMOD procedure of SAS®. An animal model including direct and maternal additive genetic and cow permanent environment effects was also used to estimate genetic parameters for FS by quasi-restricted maximum likelihood. Cows with […]
Keywords: beef calves; fail to suckle; heritability; mammary system