Tempranillo blanco Tempranillo blanco Tempranillo blanco is a white Spanish wine grape variety that is grown in the Rioja "Denominación de Origen" (DOC). It is a mutation of the red Tempranillo grape variety that is planted in Rioja. The white grape variety was discovered in a Tempranillo vineyard in the Rioja region by a wine grower in the late 20th century. In 2007, the "Consejo Regulador" of Rioja officially sanctioned the use of Tempranillo blanco in the DOC wines of Rioja. Tempranillo blanco was discovered in 1988 by a wine grower in a Tempranillo vineyard near Murillo de Río Leza in the
Peloursin Rif" (later Durif) by ampelographer Victor Pulliat in 1868. Durif later made its way to California where it was eventually named Petite Sirah. In the late 20th century University of California, Davis researchers led by Dr. Carole Meredith discovered that some of the California plantings of Petite Sirah were, in fact Peloursin, and that Peloursin had a parent-offspring relationship with Durif that likely sprung from a crossing with Syrah. Peloursin is a vigorous grapevine capable of producing high yields and excessive foliage if not kept in check with winter pruning and summertime leaf pulling. The variety tends to be a