Synonym (also Valentin Blattner 91-26-17) for the grape variety Cabertin; see there.
The red grape variety (also VB 91-26-17) is an interspecific new cross between Cabernet Sauvignon x unknown resistance partners. It is assumed to be a complex cross between Cabernet Sauvignon x (Silvaner x (Riesling x Vitis vinifera) x (JS 12417 x Chancellor)) as is the case with the new varieties Cabernet Blanc and...
Serious sources on the internet are rare - and Wine lexicon from wein.plus is one such source. When researching for my articles, I regularly consult the wein.plus encyclopaedia. There I get reliable and detailed information.
Thomas Götz
Weinberater, Weinblogger und Journalist; Schwendi