1. University of Alberta, 3158, Renewable Resources, ESB 4-30, Edmonton, Alberta, Canada, T6G 2E3, , ;
2. University of Alberta, 3158, Renewable Resources, Edmonton, Alberta, Canada;
3. Université de Sherbrooke, Biologie, 2500 boul. de l'Université, Sherbrooke, Quebec, Canada, J1K 2R1, , ;
4. McGill University, Dept. Natural Resource Sciences, 21 111 Lakeshore Road, Ste-Anne-de-Bellevue, Quebec, Canada, H9X 3V9, , ;
5. Universite de Montreal, 5622, Jardin botanique de Montréal, Montreal, Quebec, Canada;
6. Université Laval, Horticultural Research Center, 2480bvd hochelaga, Quebec, Quebec, Canada, G1V 0A6;
7. Université Laval, Horticultural Research Center, 2480 Hochelaga Blv, Quebec, Quebec, Canada, G1V 0A6, ;
8. Université de Sherbrooke, Biologie, 2500, boulevard de l'université, Sherbrooke, Quebec, Canada, J1K 2R1, ;