1 Institute of Plant Genetics, Polish Academy of Sciences, ul. Strzeszynska, Poznan, Poland.
2 Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), OT Gatersleben, Corrensstrasse, Stadt Seeland, Germany.
3 Applied Bioinformatics, Bioscience, Plant Sciences Group, Wageningen University and Research Centre (WUR), Droevendaalsesteeg, PB Wageningen, The Netherlands.