1. São Paulo State Univ. (USESP), College of Agricultural Science Dep. of Crop Science Lageado Experimental Farm, P.O. Box 237 18610‐307 Botucatu São Paulo Brasil
2. Brazilian Agricultural Research Corporation (EMBRAPA) Rice and Bean Research Center Rodovia GO‐462, km 12, P.O. Box 179 75375‐000 Santo Antônio de Goiás Goiás Brazil
3. São Paulo State Univ. (USESP), College of Engineering Dep. of Crop Science, Food Technology, and Social‐Economy P.O. Box 31 15385‐000 Ilha Solteira São Paulo‐Brazil