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.
01/Dec/2001
Angelo Elias Marion, Paulo Roberto Nogara Rorato, Gilka Barbosa Ferreira, Dionéia Magda F. Everling, Henrique Dorneles Fernandes
DOI: 10.1590/S1516-35982001000800006
To study heterogeneity of variances and to estimate the heritability coefficients at different levels of herd milk production and at different levels of standard deviation records on 13,053 lactations of 6,828 Holstein cows, sired by 811 bulls and distributed in 78 herds in the State of Rio Grande do Sul from 1988 a 1997 were analyzed. The herds were grouped by milk production and were stratified by the standard deviation of milk production (305 days) in three levels (low, medium […]
Keywords: heterogeneity of variance; Holstein breed; production level