The red grape variety is an interspecific new variety between Alicante Ganzin x Trousseau Noir. Synonyms are California S 26, Kek Royalti and Royalti. It contains genes from Vitis rupestris and Vitis vinifera. The hybrid was crossed in 1938 at the California Agricultural Experiment Station by Harold P. Olmo (1909-2006). At the same time, the quite similar Rubired with the same mother variety was also created here, both varieties were used in 1958. The late-maturing Royalty is moderately resistant to both powdery mildews. It produces dark-coloured wines that are very suitable as Teinturier (colouring grapes). The variety is also used as table grape. It is mainly grown in California's Central Valley. In 2016, a total of 93 hectares of vineyards were designated in the USA (Kym Anderson).
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