Tempranillo the Spanish Conquistadors in the 17th century, as certain Criolla varieties in Argentina have a closer genetic relationship to Tempranillo than to a small handful of other European varieties against which the Criolla varieties were tested. Despite its apparent fragility, Tempranillo travelled widely during the 20th century and, following much trial and error, has become established throughout the world. In 1905, Frederic Bioletti brought Tempranillo to California where it received a cool reception not only due to the encroaching era of Prohibition, but also because of the grape's dislike of hot, dry climates. It was much later, during the 1980s,
Peloursin California vineyards that thought they were planted with Durif/Petite Sirah were found to be field blends that contain some plantings of Peloursin. In addition to being a parent of Durif, Peloursin was also crossed with Persan to create Joubertin. DNA testing also suggest a relationship between Peloursin and Bia blanc which share some morphological similarities but the exact nature of that relationship is not yet known. Plantings of Peloursin are often confused with its offspring Durif and this was particularly the case in California where many plantings of Petite Sirah/Durif were discovered to actually be Peloursin. In the Jura region,