1. Department of Plant Biology, Linnean Center for Plant Biology, Uppsala BioCentre Swedish University of Agricultural Sciences (SLU) SE‐750 07 Uppsala Sweden
2. Science for Life Laboratory, Department of Gene Technology KTH Royal Institute of Technology SE‐171 65 Solna Sweden
3. Skogforsk, Uppsala Science Park Uppsala SE‐751 83 Sweden
4. Department of Forest Genetics and Plant Physiology, Umeå Plant Science Centre Swedish University of Agricultural Sciences (SLU) SE‐901 83 Umeå Sweden
5. Department of Plant Physiology, Umeå Plant Science Centre Umeå University SE‐901 87 Umeå Sweden