Joao M.B. Vendramini1, Lynn E. Sollenberger2, Vinicius C. Gomes3, Frank A. Kuhawara4, Joao M.D. Dalmazo Sanchez3, Fabio A.A. Oliveira5, Jorge C.D. Ralston6 and Danieli P. da Silva7, (1)3401 Experiment Station, University of Florida, Ona, FL, US, (2)3105 McCarty Hall B, PO Box 110500, University of Florida, Gainesville, FL, US, (3)Range Cattle Research and Education Center, University of Florida, Ona, FL, (4)Department of Animal Sciences, Sao Paulo State University, Botucatu, Brazil, (5)Agricultural and Biological Engineering, University of Florida, Gainesville, FL, (6)Department of Animal Sciences, University of Sao Paulo, Piracicaba, Brazil, (7)Department of Animal Sciences, University of Sao Paulo, Pirassununga, Brazil