The white grape variety (also Geisenheim 3-48, Wittberger) is a new variety between Schiava Grossa (Trollinger) x Riesling, which was confirmed by DNA analyses published in 2012. Incidentally, the two new varieties Kerner and Rotberger were created from the same parents. The cross was made in 1928 by Heinrich Birk (1898-1973) at the Geisenheim Research Institute in the Rheingau. The vine is susceptible to Botrytis. It produces acid-accentuated white wines, which are particularly suitable for sparkling wine production. However, the variety has not become established; in 2010, no stock was recorded in Germany.