The white grape variety (also known as Hybernal, GM 322-58) is a new variety between (Seibel 7053 = Chancellor x Riesling) x (Seibel 7053 x Riesling). It contains genes from Vitis labrusca, Vitis lincecumii, Vitis rupestris and Vitis vinifera. The hybrid was crossed in 1944 by Heinrich Birk (1898-1973) in Geisenheim (Rheingau). Plant variety protection was granted in 1977. The late-maturing, frost-hardy vine is resistant to various fungal diseases such as powdery and downy mildew and botrytis and is therefore considered a PIWI variety. It produces fresh, fruity white wines that can have a subtle foxy flavour. The variety is cultivated in Germany (3 ha), Moldova (19 ha), the Czech Republic (407 ha) and Canada (1 ha).
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