1. U.S. Department of Agriculture, Agricultural Research Service, Hard Red Spring and Durum Wheat Quality Laboratory, Harris Hall, North Dakota State University, Dept. 7640, P.O. Box 6050, Fargo, ND 58108-6050. Mention of trade names or commercial products in this publication is solely for the purpose of providing specific information and does not imply recommendation or endorsement by the U.S. Department of Agriculture.
2. Corresponding author. Phone: (701) 239-1413. Fax: (701) 239-1377. E-mail: douglas.doehlert@ndsu.edu
3. Department of Plant Sciences, North Dakota State University, Dept. 7650, P.O. Box 6050, Fargo, ND 58108-6050.