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The red grape variety (also Klosterneuburg 1358-1-47) is an interspecific new variety between Zweigelt x Klosterneuburg 1189-9-77(Seyve-Villard 18-402 x Blaufränkisch). Genes of Vitis berlandieri, Vitis cinerea, Vitis lincecumii, Vitis rupestris and Vitis vinifera are included. The crossing of the hybrids was done in 1970 by Dr. Gertraud Mayer at the Klosterneuburger Weinbauinstitut (Langenzersdorf) in Lower Austria. A similar variety also created here is the new breed Rathay. The former director of the institute, Leonhard Roesler (1839-1910), was honoured with this name. In Austria it was approved as a quality wine grape variety in 2000. The medium-ripening vine is resistant to both types of mildew(PIWI variety) and frost down to minus 25 °Celsius. It produces a deep dark red wine, rich in tannins and extracts, which is well suited for barrique ageing. It occupies 216 hectares of vineyards in Austria with a strong upward trend, as well as 1 hectare in Hungary. In 2016, a total of 217 hectares of vineyard area were designated (statistics Kym Anderson).

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