1. São Paulo Agency of Agribusiness Technology (APTA) Andradina SPBrazil
2. São Paulo State Univ. (UNESP) College of Agricultural Science, Dep. of Crop Science Botucatu SPBrazil
3. UNESP, School of Veterinary Medicine and Animal Science Dep. of Animal Nutrition and Breeding Botucatu SPBrazil
4. Formerly UNESP College of Agricultural Science Botucatu SP Brazil
5. Brazilian Agricultural Research Corporation (EMBRAPA) Corn and Sorghum Research Center Sete Lagoas MGBrazil
6. USDA–ARS 3218 Williams Hall, Campus Box 7619, North Carolina State Univ. RaleighNC27695‐7619