1. Department of Forest Botany, Dendrology and Geobiocenology, Mendel University in Brno, Czech Republic
2. Siberian Federal University, Krasnoyarsk, Russia
3. Institute of Plant Breeding, Genetics and Genomics, University of Georgia, Athens, GA, USA
4. Daniel B. Warnell School of Forestry and Natural Resources, University of Georgia, Athens, Georgia, USA