Which grape variety is NOT one of the key grapes of Vinho Verde DOC?

Vinho Verde DOC, located in the Minho region of Portugal, is known for its unique and refreshing wines primarily produced from specific grape varieties. The key white grape varieties used in Vinho Verde are indeed Loureiro, Arinto, and Alvarinho, which contribute to the region's distinctive flavor profiles, characterized by high acidity and freshness.

Loureiro adds floral and fruity aromas, while Arinto provides crispness and aging potential. Alvarinho is celebrated for its aromatic complexity and full-bodied character, often considered one of the finest varieties from the region.

Tinta Roriz, on the other hand, is a red grape variety more commonly associated with the Douro Valley and is known internationally as Tempranillo. It is not a key grape in the production of Vinho Verde, which predominantly focuses on white wine production. The absence of Tinta Roriz from the list of key grapes reinforces its unalignment with the traditional profile of Vinho Verde wines. This distinction underscores the region's emphasis on its native white varietals that are suited to its terroir and climate conditions.