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.
This trial was conducted to study the effects of daily milking frequency on milk yield, duration of lactation, incidence of mastitis, and calves body weight gain. Sixty-three crossbred Holstein-Zebu cows were equally and randomly assigned to three experimental groups according to the frequency of daily milkings as follows: once a day milking, twice a day milking, or alternating once or twice a day milking every 14 days. The duration of lactation, mammary gland health, and calf production did not differ among treatments in this study. However, cows milked twice a day yielded 24.54% more milk per lactation (699.9 kg) compared to the other milking regimes.
Effect of milking frequency on production of crossbred holstein-zebu cows
Ruas,José Reinaldo Mendes and Brandão,Felipe Zandonadi and Filho,José Monteiro da Silva and Borges,Álan Maia and Carvalho,Bruno Campos de and Menezes,Arismar de Castro and Amaral,Reginaldo and Neto,Alberto Marcatti. Effect of milking frequency on production of crossbred holstein-zebu cows. R. Bras. Zootec. [online]. 2006, vol.35, 2, [cited 2026-05-14], pp.428-434. Available from: <https://rbz.org.br/article/effect-of-milking-frequency-on-production-of-crossbred-holstein-zebu-cows/>. ISSN 1516-3598. http://doi.org/10.1590/S1516-35982006000200013.
Ruas,José Reinaldo Mendes; Brandão,Felipe Zandonadi; Filho,José Monteiro da Silva; Borges,Álan Maia; Carvalho,Bruno Campos de; Menezes,Arismar de Castro; Amaral,Reginaldo; Neto,Alberto Marcatti. Effect of milking frequency on production of crossbred holstein-zebu cows. R. Bras. Zootec., v.35, 2, p. 428-434. Apr. 2006. Available from: <https://rbz.org.br/article/effect-of-milking-frequency-on-production-of-crossbred-holstein-zebu-cows/>. acess on 14 May. 2026. http://doi.org/10.1590/S1516-35982006000200013.
Ruas,José Reinaldo Mendes, & Brandão,Felipe Zandonadi, & Filho,José Monteiro da Silva, & Borges,Álan Maia, & Carvalho,Bruno Campos de, & Menezes,Arismar de Castro, & Amaral,Reginaldo, & Neto,Alberto Marcatti. (2006). Effect of milking frequency on production of crossbred holstein-zebu cows. R. Bras. Zootec., 35(2) , 428-434. http://doi.org/10.1590/S1516-35982006000200013.
RuasJosé Reinaldo Mendes, BrandãoFelipe Zandonadi, FilhoJosé Monteiro da Silva, BorgesÁlan Maia, CarvalhoBruno Campos de, MenezesArismar de Castro, AmaralReginaldo, NetoAlberto Marcatti. Effect of milking frequency on production of crossbred holstein-zebu cows. R. Bras. Zootec. [Internet]. 2006 Apr [cited 2026 May 14]; 35(2): 428-434. Available from: https://rbz.org.br/article/effect-of-milking-frequency-on-production-of-crossbred-holstein-zebu-cows/. http://doi.org/10.1590/S1516-35982006000200013.
Figure 5
Dendrogram constructed using the UPGMA algorithm based on allele distances of each of the 74 individuals analyzed with five microsatellite markers.
The individuals belong to four sampling zones: (1) dam zone, (2) Huaynamota River zone, (3) central reservoir zone, and (4) southern reservoir zone.
