Affiliation: | 1.Petawawa National Forestry Institute, KOJ 1JO, Chalk River, Ontario, Canada ;2.Department of Genetics, University of Alberta, T6G 2E9, Edmonton, Alberta, Canada ;3.Research Branch, British Columbia, Ministry of Forests, V8W 3E7, Victoria, British Columbia, Canada ;4.Department of Forest Science, University of Alberta, T6G 2H1, Edmonton, Alberta, Canada ; |