Mondeuse noire 1937 and later developed a white-berried color mutation known as "Helena". Also in the late 20th and early 21st century, it was discovered that some of the plantings of Petite Sirah were actually field blends of true Petite Sirah (Durif) as well as several other varieties including Mondeuse noire. Though the exact relationship is not yet known, DNA analysis has also shown that Mondeuse noire has some relationship to the Savoie wine grape Douce noir which is known as "Charbono" in California and "Bonarda" in Argentina. While Mondeuse noire and Mondeuse blanche are not color mutations of one or the
Creston District AVA acres with 1,365 planted in vineyards. It lies on an old erosional plateau at the base of the La Panza Range with alluvial terraces and fans of Huerhuero Creek. The area is in elevation. Average annual rainfall is . The district's soils consist of old, well developed terrace and hillside soils; mix of granite and sedimentary rock. The most widely planted varieties in the Creston District AVA are Cabernet Sauvignon, Syrah, Zinfandel, Merlot, Petite Sirah. Creston District AVA Creston District AVA is an American Viticultural Area located in the south east portion of the Paso Robles AVA in San Luis