1. MATFORSK, Norwegian Food Research Institute, Osloveien 1, N -1430 Ås, Norway.
2. Corresponding author. Phone: + 47 64 97 01 06. Fax: + 47 64 97 03 33. E-mail: stefan.sahlstrom@matforsk.no
3. University of Nebraska, Department of Agronomy, Institute of Agriculture and Natural Resources, Lincoln, NE 68583-0915.
4. Present address: Room 303, Leema Bldg. #146 Soosong dong Chong ku, Seoul 110-140, Korea.
5. Present address: Wheat Marketing Center, 1200 N.W. Naito Parkway, Suite 230, Portland, OR 97209-2800.