1. USDA-ARS-RRVARC Wheat Quality Laboratory, Harris Hall, North Dakota State University, Fargo, ND 58105.
2. Corresponding author. Phone: 701-239-1414. Fax: 701-239-1377. E-mail address: Jae.Ohm@ars.usda.gov
3. Dept. of Crop and Soil Science, Room 107 Crop Science Building, Oregon State University, Corvallis, OR 97331-3002.