Mass selection. The Colli di Luni DOC allows the farmer to produce a 100% Vermentino. Many DOC producers turn to a well-known nurseryman from Udine, who sells Vermentino Sardo to them, which will therefore be planted in Liguria. Alternative? Mass selection: that is, biotypes of Vermentino (in this case) which over the years have better adapted to the territory, and by the winemaker is multiplied in the vineyard.