Tempranillo shown no genetic connection between the cultivars. Spanish cultivation of "Vitis vinifera", the common ancestor of almost all vines in existence today, began in earnest with Phoenician settlement in the southern provinces. Later, according to the Roman writer Columella, wines were grown all over Spain; yet there are only scattered references to the name "Tempranillo". Ribera del Duero wine making extends back over 2,000 years, as evidenced by the 66-metre mosaic of Bacchus, the Roman god of wine, that was unearthed in 1972, at Baños de Valdearados. It is possible that this grape was introduced to the Western Hemisphere by
Petite mutation be induced using a variety of mutagens, including DNA intercalating agents, as well as chemicals that can interfere with DNA synthesis in growing cells. Mutagens that create Petites are implicated in increased rates of degenerative diseases and in the aging process. A mutation that produces small (petite" > petite) anaerobic-like colonies had shown first in Yeast Saccharomyces cerevisiae and described by Boris Ephrussi and his co-workers in 1949 in Gif-sur-Yvette, France. The cells of petite colonies were smaller than those of wild-type colonies, but the term “petite” refers only to colony size and not the individual cell size. Over 50