1. Department of Plant Production; Faculty of Bioscience Engineering; Ghent University; Ghent Belgium
2. PCS Ornamental Plant Research; Destelbergen Belgium
3. Plant Sciences Unit; Applied Genetics and Breeding; Institute for Agricultural and Fisheries Research (ILVO); Melle Belgium
4. Plant Sciences Unit; Growth and Development; Institute for Agricultural and Fisheries Research (ILVO); Melle Belgium