Barbera is the most widely planted grape in the region, but Nebbiolo and Dolcetto account for a significant portion of the area's red wine production as well. With white wines, Moscato is the most prominent with its sparkling and frizzante style wines. Other notable white wines include styles made from the Cortese grape in Gavi as well as blends of Cortese with Arneis and Favorita from Colli Tortonesi and Alto Monferrato. Since the 1980s there has been growing numbers of experimental plantings with the international varieties of Cabernet Sauvignon, Chardonnay, Merlot, Pinot noir, Sauvignon blanc and Syrah. Other local or indigenous grapes include Baratuciat, Bonarda, Croatina, Erbaluce, Freisa, Gamba di Pernice, Grignolino, Grisa nera, Malvasia nera, Pelaverga, Plassa, Rossese bianco, Timorasso, Uvalino, Uva Rara and Vespolina.J. Robinson Jancis Robinson's Guide to Wine Grapes pg 185 Oxford University Press 1996 J. Robinson, J. Harding and J. Vouillamoz Wine Grapes - A complete guide to 1,368 vine varieties, including their origins and flavours pgs 82, 910-911, 1106 Allen Lane 2012
