1. Department of Plant Sciences, College of Agriculture and Bioresources, 51 Campus Drive, University of Saskatchewan, Saskatoon, SK, S7N 5A8, Canada.
2. Crop Development Centre, College of Agriculture and Bioresources, 51 Campus Drive, University of Saskatchewan, Saskatoon, SK, S7N 5A8, Canada.
3. Corresponding author. Phone: (306) 966-4969. Fax: (306) 966-5015. E-mail: ravi.chibbar@usask.ca