Biological Origin of Riesling

One likely parent of Riesling is Gouais Blanc, known to the Germans as Weißer Heunisch, which originated in Croatia and was brought to central Europe by the Romans. The other parent is probably a cross between a wild vine and Traminer. It is presumed that Riesling was born somewhere in the valley of the Rhine, since both Heunisch and Traminer have a long-documented history in Germany.