Joao M.B. Vendramini1, Lynn E. Sollenberger2, Vinicius C. Gomes1, Frank A. Kuhawara3, Joao M.D. Dalmazo Sanchez1, Fabio A.A. Oliveira4, Jorge C.D. Ralston5 and Danieli P. da Silva6, (1)Range Cattle Research and Education Center, University of Florida, Ona, FL, (2)3105 McCarty Hall B, PO Box 110500, University of Florida, Gainesville, FL, US, (3)Department of Animal Sciences, Sao Paulo State University, Botucatu, Brazil, (4)Department of Agricultural and Biological Engineering, University of Florida, Gainesville, FL, (5)Department of Animal Sciences, University of Sao Paulo, Piracicaba, Brazil, (6)Department of Animal Sciences, University of Sao Paulo, Pirassununga, Brazil