There are Cabernets and there are Cabernets. Subtle mutations can occur in grapes and their offspring. In California, much is made of the source of the vines planted in a vineyard. Were the cuttings for those Pinot Noir vines taken from Clos Veugeot or Romanee Conti? Are those Chardonnay from Montrachet or top-rated Chablis vineyards?
In California's Napa Valley, for example, Beaulieu Vineyard, Rutherford, is in the third year of an experiment to determine which clone of Cabernet Sauvignon will do best in one of its most highly regarded plots - B.V. No. 2 - which is the source of the winery's Georges de Latour Private Reserve, considered among the half-dozen or so consistently finest Cabernet Sauvignons produced in this country in the past three decades.
Next year, [Beaulieu] may know whether it can improve on the Georges de??? Latour Private Reserve Cabernet Sauvignon, and other vineyardists in the Napa Valley and elsewhere may end up with a specific favorite clone of the grape.