1. CEITEC - Central European Institute of Technology; Masaryk University; Brno CZ-62500 Czech Republic
2. Plant Systematics Group; Wageningen University (WU); Droevendaalsesteeg 1 Wageningen 6708 PB The Netherlands
3. Apomixis Research Group; Leibniz Institute of Plant Genetics and Crop Plant Research (IPK); Gatersleben D-06466 Germany
4. Laboratory of Genetics; Wageningen UR PSG; P.O. Box 16 Wageningen 6700 AA The Netherlands