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Earlier, Riesling was sometimes claimed to have originated from wild vines of the Rhine region, without much support to back up that claim. More recently, [[DNA fingerprinting]] by Ferdinand Regner indicated that one parent of Riesling is [[Gouais Blanc]], known to the Germans as ''Weißer Heunisch'', a variety that, while rare today, was widely grown by the French and German peasantry of the Middle Ages. The other parent is a cross between a wild vine and [[Traminer]]. It is presumed that the Riesling was born somewhere in the valley of the Rhine, since both Heunisch and Traminer have a long documented history in Germany, but with parents from either side of the [[Adriatic]] the cross could have happened anywhere on the way.
It has also been suggested, but not proved, that the [[#Red Riesling|red-skinned version]] of Riesling is the forerunner of the common, "white" Riesling.<ref name="WP Roter Riesling">[http://www.wein-plus.
==Longevity==
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