What is the primary grape variety used in Touraine?

The primary grape variety used in Touraine is Sauvignon Blanc. This region, located in the Loire Valley of France, is well known for producing high-quality wines, particularly those made from this varietal. While Vouvray is indeed a notable wine region within Touraine primarily associated with Chenin Blanc, it is important to recognize that the question specifically asks about grape variety rather than a wine appellation.

Sauvignon Blanc thrives in the clay and limestone soils of Touraine, producing wines that are fragrant, crisp, and refreshing, often with pronounced acidity and citrus flavors that the region is famous for. The context of Touraine's winemaking underscores the significance of Sauvignon Blanc as the dominant grape, especially regarding the overall wine profile of the region. Other varieties like Grenache Noir and Riesling are not typical of Touraine's production, which further highlights the essential role of Sauvignon Blanc in this area.