Figure 1

Relationship among samples based on Nei's [40]unbiased genetic distance and UPGMA clustering [43]. FP = feral populations, CV = commercial varieties; variety type: OP = open pollinated, cHy = composite hybrid, rHy = restored hybrid. Seed company: NPZ = Norddeutsche Pflanzenzucht, PS = Probstdorfer Saatzucht, RWA = Raiffeisen Ware Austria, SL = Saatbau Linz. The year of approval for each variety is also indicated.