1. Departament of Animal Science, São Paulo State University, Jaboticabal 14884-900, SP, Brazil
2. Agência Paulista de Tecnologia dos Agronegócios, Colina 14770-000, SP, Brazil
3. Range Cattle Research and Education Center, University of Florida, Ona, FL 33865, USA
4. Departament of Animal Science and Food Engineering, São Paulo University, Pirassununga 13635-900, SP, Brazil