The white grape variety (also Geisenheim 4984) is an interspecific new variety between(Riesling x Silvaner) x Seibel 7053(Chancellor). The mother variety has nothing to do with Müller-Thurgau, which is wrongly mentioned in some sources (apart from the fact that Silvaner was not involved in Müller-Thurgau). It contains genes from Vitis labrusca, Vitis lincecumii, Vitis rupestris and Vitis vinifera. The hybrid was crossed by Dr. Heinrich Birk (1898-1973) in 1962 at the Geisenheim Research Institute in the Rheingau. The name was given in honour of the German-born viticultural pioneer Hans Breidecker, who successfully introduced the variety in New Zealand. The vine is resistant to both mildew and botrytis. It produces white wines with pronounced aromas of pears and apples. The variety is cultivated in New Zealand on seven hectares of vineyards. In Austria (Burgenland) the variety has been used for the local speciality Uhudler since 2016.
Source: Wine Grapes / J. Robinson, J. Harding, J. Vouillamoz / Penguin Books Ltd. 2012
Pictures: Ursula Brühl, Doris Schneider, Julius Kühn Institute (JKI)