1. USDA-ARS, Southern Regional Research Center, New Orleans, LA.
2. Corresponding author. Fax: 504-286-4430; E-mail: etchamp@nola.srrc.usda.gov
3. USDA-ARS, Biometrical Consulting Service, Beltsville, MD.
4. USDA-ARS, Rice Quality Laboratory, Beaumont, TX.
5. USDA-ARS, Richard B. Russell Research Center, Athens, GA.
6. University of Arkansas Rice Research and Extension Center, Stuttgart.
7. Louisiana State University Rice Research Station, Crowley.
8. California Cooperative Rice Research Foundation, Biggs.