Riesling x Sylvaner

Müller-Thurgau is a white grape variety (sp. Vitis vinifera) which was created by Hermann Müller from the Swiss Canton of Thurgau in 1882 at the Geisenheim Grape Breeding Institute in Germany. It is a crossing of Riesling with Madeleine Royale. It is used to make white wine in Germany, Austria, Northern Italy, Hungary, England, Australia, the Czech Republic, Slovakia, Slovenia, New Zealand, Canada, the United States, Belgium and Japan. There are around 22,201 hectares (54,860 acres)) cultivated worldwide, which makes Müller-Thurgau the most widely planted of the so-called "new breeds" of grape varieties created since the late 19th century. Although plantings have decreased significantly since the 1980s, as of 2019 it was still Germany's second most planted variety at 11,400 hectares and 11.4% of the total vineyard surface. In 2007, the 125th anniversary was celebrated at the Geisenheim Grape Breeding Institute. Müller-Thurgau is also known as Rivaner (Austria, Germany, Luxembourg, and especially for dry wines), Riesling x Sylvaner, Riesling-Sylvaner, Rizvanec (Slovenia) and Rizlingszilváni (Hungary). Most grapes have been created from a desire to harness qualities in two separate grapes and to generate a new vine that combines the qualities of both. When Dr. Müller created the grape in the Geisenheim Grape Breeding Institute in the late 19th century, his intention was to combine the intensity and complexity of the Riesling grape with the ability to ripen earlier in the season that the Silvaner grape possesses. Although the resulting grape did not entirely attain these two qualities, it nonetheless became widely planted across many of the German wine-producing regions.

Source: Wikipedia