1. Department of Agricultural, Food and Nutritional Science, University of Alberta, Lethbridge, AB T6G 2P5, Canada.
2. Lethbridge Research and Development Center, Agriculture and Agri-Food Canada, Lethbridge, AB T1J 4B1, Canada.
3. Lacombe Research and Development Centre, Agriculture and Agri-Food Canada, Lacombe, AB T4L 1W1, Canada.