Dão is a Portuguese wine region situated in the Região Demarcada do Dão with the Dão-Lafões sub region of the Centro, Portugal. It is one of the oldest established wine regions in Portugal. The Dão region is the origin of the Touriga Nacional vine that is the principal component of Port wine.
The area is home to several dozen varieties of indigenous grapes with the majority of wine production being made from the Touriga Nacional, Tinta Roriz, Jaen, Alfrocheiro Preto and Encruzado. 80% of the region's production is in red wines with DOC regulations stipulating that at least 20% of the production must be from Touriga Nacional. Some of the top reserve wine may carry the designation Dão nobre (meaning noble Dão). Another reserve designation Garrafeira requires wines to be 0.5% higher in alcohol content then the 12.5% minimum and to spend at least 2 years in aging in oak. The maximum yield for red wine grapes is 70 hl/ha.
The red wines tend to be very tannic due to prolong periods of maceration during winemaking. Many producers make liberal use of French and Portuguese oak. The style has been improving with some producers concentrating on make more fruit-forward styles with smoother tannins. Historically the white wines were known for being over oxidized and full bodied but more modern winemaking has been producing white wines that are fresh, fruity and fragrant. The Encruzado is the principal grape of the area's whites with some blend of Malvasia Fina and Bical. Garrafeira white wines require at least 0.5% more alcohol by volume then the 11.5% DOC minimum and at least 6 months aging in oak. The maximum allowable yields for white wine grapes is 80 hl/ha.
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Dão DOC, en.wikipedia.org
Spotlight on Portugal's Dão region, www.wineanorak.com
Portugal's Dão Wine Region: There and Back Again, www.intowine.com