1. Dept. of Grain Science and Industry, Kansas State University, Manhattan, KS 66506.
2. Dept. of Human Nutrition, Kansas State University, Manhattan, KS 66506.
3. Corresponding author. Phone: 785/537-9449. Fax: 785/532-3132. E-mail: setser@ksu.edu
4. Dept. of Statistics, Kansas State University, Manhattan, KS 66506.
5. Dept. of Agronomy, Kansas State University, Manhattan, KS 66506.