1 IBED, Population Biology, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, The Netherlands.
2 Wageningen UR Greenhouse Horticulture, PO Box 20, 2265 ZG, Bleiswijk, The Netherlands.
3 Department of Plant Physiology, Swammerdam Institute for Life Sciences, University of Amsterdam, P.O. Box 94215, 1090 GE, Amsterdam, The Netherlands.
4 IBED, Population Biology, University of Amsterdam, Science Park 904, 1098 XH, Amsterdam, The Netherlands. arne.janssen@uva.nl.
Unfortunately, the citation of one of the papers was published erroneously in the original version and corrected here by this Erratum. The original article was corrected.