Merlot ('MERL-oh' in British English, mer-LOH in American English and standard French) is a red wine grape that is used as both a blending grape and for varietal wines. Merlot-based wines usually have medium body with hints of berry, plum, and currant. Its softness and "fleshiness", combined with its earlier ripening, makes Merlot a popular grape for blending with the sterner, later-ripening Cabernet Sauvignon, which tends to be higher in tannin. Merlot is also one of the most popular red wine varietals in many markets. This flexibility has helped to make it one of the world's most planted grape varieties. As of 2004, Merlot was estimated to be the third most grown variety at globally, with an increasing trend.J. Robinson (ed) The Oxford Companion to Wine Third Edition, Oxford University Press 2006, pg. 746: "Vine varieties", ISBN 0-19-860990-6 This put Merlot just behind Cabernet Sauvignon's .

Origins and genetics

The earliest recorded mention of Merlot was in the notes of a local Bordeaux official who in 1784 labeled wine made from the grape in the Libournais region as one of the area's best. The name comes from the French regional patois word "merlot", which means "young blackbird" ("merle" is the French word for several kinds of thrushes, including blackbirds); the naming came either because of the grape's beautiful dark-blue color, or due to blackbirds' fondness for grapes. By the 19th century it was being regularly planted in the Médoc on the "Left Bank" of the Gironde. Oz Clarke Encyclopedia of Grapes pg 129 Harcourt Books 2001 ISBN 0151007144

It was first recorded in Italy around Venice under the synonym Bordò in 1855. The grape was introduced to the Swiss, from Bordeaux, sometime in the 19th century and was recorded in the Swiss canton of Ticino between 1905 and 1910.

Researchers at University of California, Davis believe that the grape is an offspring of Cabernet Franc and is a sibling of Carménère.

Until 1993, the Chilean wine industry mistakenly sold a large quantity of wine made from the Carmenere grape as Merlot. In that year, genetic studies discovered that much of what had been grown as Merlot was actually Carmenere, an old French variety that had gone largely extinct in France due to its poor resistance to phylloxera, which as of 2006 does not exist in Chile.

The labeling Chilean Merlot is a catch-all to include wine that is made from a blend of indiscriminate amounts of Merlot and Carmenere. With Merlot ripening 3 weeks earlier than Carmenere, these wines differ greatly in quality depending on harvesting. Oz Clarke Encyclopedia of Grapes pg 134 Harcourt Books 2001 ISBN 0151007144