1. Saskatoon Research Centre; Agriculture and Agri-Food Canada; Saskatoon SK Canada S7N 0X2
2. Department of Plant Science; University of Manitoba; Winnipeg MB Canada R3T 2N2
3. INRA-Bioger; 78850 Thiverval-Grignon France
4. Department of Computer Science; University of Saskatchewan; Saskatoon SK Canada S7N 5C9