1. Centre for Forest Biology, University of Victoria, PO Box 1700 STN CSC, Victoria, BC V8W 2Y2, Canada
2. Department of Forest and Conservation Sciences, University of British Columbia, 2424 Main Mall, Vancouver, BC V6T 1Z4, Canada
3. British Columbia Ministry of Forests, Lands and Natural Resource Operations and Rural Development, Tree Improvement Branch, PO Box 9518 Stn Prov Govt, Victoria BC V8W 9C2, Canada