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The white grape variety (also Geisenheim 4984) is an interspecific new variety between (Riesling x Silvaner) x Seibel 7053 (Chancellor). The parent variety, however, has nothing to do with Müller-Thurgau, which is wrongly named 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 the breeder 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 viticulture pioneer Hans Breidecker, who successfully introduced the variety in New Zealand. The vine is resistant to both powdery mildew and botrytis. It produces white wines with pronounced aromas of pears and apples. The variety is cultivated on 0.5 hectares in New Zealand. In Austria (Burgenland), the variety has been approved for the local speciality Uhudler since 2016, but no stocks were reported this year (Kym Anderson statistics).

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