1. Institute for Breeding Research on Agricultural Crops; Julius Kühn-Institut; Federal Research Centre for Cultivated Plants; Rudolf-Schick-Platz 3a OT Gross Lüsewitz D-18190 Sanitz Germany
2. Department of Molecular Biology and Genetics; Howard Hughes Medical Institute, Johns Hopkins University School of Medicine; Baltimore MD 21205 USA
3. Nordsaat Saatzucht GmbH, Saatzucht Granskevitz; Granskevitz 3, D-18569; Granskevitz/Rügen Germany
4. Institute of Agricultural and Nutritional Sciences; Martin-Luther-University Halle-Wittenberg; Julius-Kühn-Street 25 06099 Halle Germany