The red grape variety is a new breed between Carignan Noir ( mazuelo ) x Cabernet Sauvignon, Synonyms are Cabernet Ruby, California 234 F2, Roubi Cabernet and Rubi Kaberne. The crossing took place in 1936 at the University of California in Davis by Dr. Harold P. Olmo (1909-2006). The breeding goal was to develop a variety suitable for the hot regions in California for Bordeaux-like wines. However, it later turned out that it is also suitable for much cooler areas. The variety was later named breeding number F2-7 for the less successful new breeds Carmine. Carnelian and Centurion used.
The medium to late ripening, productive vine is moderately susceptible to real ones mildew, but very resistant to Botrytis, It produces dark-colored, rustic red wines with aromas of red fruits. It is also called table grape used. The variety is in California mostly grown in the San Joaquin Valley. In 2010, 2,425 hectares were recorded with a downward trend. There are other stocks in the US North Carolina. Oklahoma. Texas. Virginia and Wisconsin, as in Australia (962 ha), Brazil (42 ha), Israel. South Africa (2,220 ha) and Uruguay, In 2010 the variety occupied 5,730 hectares of vines with a downward trend (in 2000 there were 7,419 hectares). It was in the worldwide varieties ranking at rank 105.
Source: Wine Grapes / J. Robinson, J. Harding, J. Vouillamoz / Penguin Books Ltd. 2012
Images: Ursula Brühl, Doris Schneider, Julius Kühn Institute (JKI)