Ruby Cabernet is a red winegrape created in 1936 by Dr Harold Olmo at UC Davis in California. It is a cross of Cabernet Sauvignon and Carignan and the intention was to combine Carignan's heat tolerance with Cabernet Sauvignon's quality.
Ruby Cabernet produces a medium bodied red wine with good colour and a pleasant cherry flavour, but has not yet demonstrated it can produce a quality wine.
It is popular with growers because it can withstand high winds and can be planted in areas that other vines cannot.
Much Ruby Cabernet goes into ordinary blends, but increasingly varietal wines are being released.
Cabernet Sauvignon is a variety of red grape mainly used for wine production, and is, along with Chardonnay, one of the most widely-planted of the world's noble grape varieties.
Cabernet Franc is often used in blends with Cabernet Sauvignon to add aromatics.
Cabernet Sauvignon, like all noble winegrape varieties, is of the species Vitis vinifera, and genetic studies in the 1990s indicated it is the result of a cross between Cabernet Franc and Sauvignon Blanc.
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