1. Department of Terrestrial Ecology, Netherlands Institute of Ecology (NIOO‐KNAW), Boterhoeksestraat 48, NL‐6666 GA Heteren, The Netherlands
2. Laboratory of Plant Physiology, Wageningen University, Droevendaalsesteeg 1, NL‐6708 PB Wageningen, The Netherlands
3. Laboratory of Genetics, Wageningen University, Droevendaalsesteeg 1, NL‐6708 PB Wageningen, The Netherlands
4. Centre for Biosystems Genomics, Droevendaalsesteeg 1, NL‐6708 PB Wageningen, The Netherlands