Athena D. McKown^1*, Jaroslav Kla´psˇteˇ^1,2*, Robert D. Guy¹, Armando Geraldes³, Ilga Porth^1,4, Jan Hannemann⁵, Michael Friedmann³, Wellington Muchero⁶, Gerald A. Tuskan⁶, J€urgen Ehlting⁵, Quentin C. B. Cronk³, Yousry A. El-Kassaby¹, Shawn D. Mansfield⁴ and Carl J. Douglas³

¹Department of Forest and Conservation Sciences, Faculty of Forestry, University of British Columbia, Forest Sciences Centre, 2424 Main Mall, Vancouver, BC, V6T 1Z4, Canada; ²Department of Dendrology and Forest Tree Breeding, Faculty of Forestry and Wood Sciences, Czech University of Life Sciences, Prague 165 21, Czech Republic; ³Department of Botany, University of British Columbia, Vancouver, BC, V6T 1Z4, Canada; ⁴Department of Wood Science, Faculty of Forestry, University of British Columbia, Forest Sciences Centre, 2424 Main Mall, Vancouver, BC, V6T 1Z4, Canada; ⁵Department of Biology and Centre for Forest Biology, University of Victoria, Victoria, BC, V8W 3N5, Canada; ⁶BioSciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA