1. Department Plants and Crops, Faculty of Bioscience Engineering Ghent University Coupure links 653 Ghent B‐9000 Belgium
2. Flanders research institute for agriculture, fisheries and food (ILVO) Plant Sciences Unit Burg. Van Gansberghelaan 96 Merelbeke B‐9820 Belgium
3. Department Pomology Proefcentrum Fruitteelt (pcfruit npo) Fruittuinweg 1 Sint‐Truiden B‐3800 Belgium