1. Department of Plant and Environmental Sciences; University of Copenhagen; Thorvaldsensvej 40 DK-1871 Frederiksberg C Denmark
2. Carlsberg Laboratory; Gamle Carlsberg Vej 10 DK-1799 Copenhagen V Denmark
3. Nordic Seed; Højbygårdvej 14 4960 Holeby Denmark
4. Nordic Genetic Resource Center; Smedjevägen 3 SE-23053 Alnarp Sweden
5. Department of Molecular Biology and Genetics; Aarhus University; Forsøgsvej 1 DK-4200 Slagelse Denmark
6. Department of Biology; Lund University; Sölvegatan 35 SE-22362 Lund Sweden