1. Swift Current Research and Development Centre, Agriculture and Agri-Food Canada, P.O. Box 1030, Swift Current, SK S9H 3X2, Canada.
2. Advancing Wheat Technology, 870 Field Drive, Swift Current, SK S9H 4N5, Canada.
3. Department of Agronomy, Iowa State University, Ames, IA 50011, USA.
4. Morden Research and Development Centre, Agriculture and Agri-Food Canada, 101 Route 100, Morden, MB R6M 1Y5, Canada.