Joao M.D. Dalmazo Sanchez1, Joao M.B. Vendramini2, Lynn E. Sollenberger3, Maria Lucia A. Silveira1, Jose C.B. Dubeux Jr.4, Frank Kuwahara5, Ulysses Cecato6, James K. Yarborough1, Fabio Cortez Leite de Oliveira7 and Cecílio Viega Soares Filho8, (1)Range Cattle Research and Education Center, University of Florida, Ona, FL, (2)Texas A&M university, Stephenville, TX, (3)Agronomy Department, University of Florida, Gainesville, FL, US, (4)North Florida Research and Education Center, University of Florida, Marianna, FL, (5)Department of Animal Sciences, Sao Paulo State University, Botucatu, Brazil, (6)Department of Animal Sciences, State University of Maringa, Maringa, Brazil, (7)Departamento de Zootecnia, Universidade Estadual de Maringa, Maringa, Brazil, (8)Veterinary Medicine, Sao Paulo State University, Aracatuba, Brazil