Merlot is one of the core red wine grapes,
and one with an ancient heritage. Geneticists at the University of California at Davis believe that Merlot is a descendant of Cabernet Franc, which makes it a sibling of Carménère and Cabernet Sauvignon. It's one of the core wines traditionally used in a Bordeaux blend. In fact, Merlot is one of the most popular wines for not only various table red blends, but specifically, as a blended wine bottled as Cabernet Sauvignon-Merlot, since the typically softer, more fruit-forward Merlot works well as a balance to the more tannic Cabernet Sauvignon. Moreover, if the early ripening Merlot is damaged by frosts, then the vintner can turn to Cabernet Sauvignon.
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