The white grape is an interspecific new breed between Riesling x Roucaneuf, Synonyms are Risus, Risys and Rysus. They are genes of Vitis berlandieri. Vitis labrusca. Vitis lincecumii. Vitis rupestris and Vitis vinifera contain. The intersection of hybrid took place in the Ukraine by the breeder P. Golodriga. The medium to late-ripening, high-yielding vine is resistant to frost to minus 26 degrees Celsius and fungal diseases, It produces Riesling - like white wines, which also for the distillation be used. The variety is in Russia grown in the areas of Rostov and Krasnador. In 2010, 115 hectares were designated here.
Source: Wine Grapes / J. Robinson, J. Harding, J. Vouillamoz / Penguin Books Ltd. 2012