The white grape variety is a new variety between Saperavi Severny x (Foster's White Seedling x Prachttraube). Snonyms are Ambros Weiß, Geisenheim 6495-3 and Sibera Blanca. It contains genes from Vitis amurensis and Vitis vinifera. The hybrid was crossed in 1964 by a team led by Vilém Kraus (1924-2103) in Lednice in the former Czechoslovakia. The breeding and selection of the seedlings was then carried out at the Geisenheim Research Institute (Rheingau) under Dr Helmut Becker (1927-1990). Incidentally, the same parents also produced the Serena variety. Sibera was a crossing partner in the new Calastra variety.
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