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.
09/Sep/2019
Mário Henrique Magalhães Araújo da Silva
, Carlos Henrique Mendes Malhado
, Elisandra Lurdes Kern
, Darlene dos Santos Daltro
, Jaime Araujo Cobuci
, Paulo Luiz Souza Carneiro
ABSTRACT The objective of this study was to evaluate inbreeding depression in Holstein cows in Brazil, considering their 305-day milk production (MP), age of first calving (AFC), and calving interval (CI). The effects of inbreeding depression on the traits were determined using four regression models (linear, quadratic, exponential, and Michaelis-Menten) about the errors generated by the animal model. The linear model was significant for CI, and the quadratic model was significant for CI and AFC. The Michaelis-Menten and exponential models […]
Keywords: calving interval; inbreeding coefficient; linear models; non linear models
01/Dec/2005
Márcio Cinachi Pereira, Maria Eugênia Zerlotti Mercadante, Lucia Galvão de Albuquerque, Alexander George Razook
DOI: 10.1590/S1516-35982005000700011
Data from the Caracu herd of Sertãozinho Experimental Station, selected for post weaning weight between 1979 and 2002, was analyzed to describe effective size, generation coefficient, generation interval, selection differentials and genetic gain in this population. Genetic gain was estimated by the product of the average weighted standardized differential (kg) and heritability divided by the average generation interval. Averages of sire and dam weighted selection differentials for post weaning weights were 1.10 and 0.28 standard deviations units (s.d.u). Sire and […]
Keywords: effective size; generation coefficient; generation interval; inbreeding coefficient; post-weaning weight; selection