In 2004, DNA profiling conducted at University of California, Davis showed the grape to be closely related to the Piedmont grape Freisa, and to be a genetic cousin of Nebbiolo.
Countries grown:
Argentina,
Australia,
Brazil,
Canada,
Chile,
Dagestan (Daghestan),
France,
Hungary,
Mexico,
New Zealand,
Portugal,
Romania,
South Africa,
Spain,
Switzerland,
Thailand,
Turkey,
United States,
Uruguay