1. USDA-ARS, University of Nebraska, Lincoln, NE 68583.
2. Corresponding author. E-mail: agro100@unlvm.unl.edu Fax: 402-472-4020.
3. USDA-ARS, North Dakota State University, Fargo, ND.
4. Department of Agronomy, University of Nebraska, Lincoln, NE.
5. American Institute of Baking, Manhattan, KS.
6. Anheuser-Busch, St. Louis, MO.
7. The Earthgrains Co, St. Louis, MO. Present address: Interstate Brands, Kansas City, MO.