The white grape variety is a new cross between Tramín Cervený(Gewürztraminer) x Veltlínske Červené Biele (red-white Veltliner). Incidentally, the same parents also gave rise to the new variety Hetera. Synonyms are Ryvola (was the first name) and TCVCB 15/4. The cross was made in 1958 in Slovakia (then Czechoslovakia) by Dorata Pospisilova and Ondrej Korpas. Variety protection was granted in 1998. The medium to late-maturing, high-yielding vine is resistant to frost and downy mildew, but susceptible to botrytis. It produces full-bodied, alcohol-rich, aromatic white wines with floral aromas. In 2010, it still occupied 152 hectares of vineyards; however, no more were designated in 2022.
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