Tempranillo grown to be considered the state's signature grape. In Oregon, the grape was introduced by Earl Jones of Abacela Vineyards and Winery, in the Umpqua Valley AVA. Their climate (hot during the summer day, and cool overnight) seems to be perfect for the Tempranillo grape. In Australia Tempranillo is grown in the McLaren Vale region, and also North East Victoria. Tempranillo has also been introduced by some wine producers in Thailand. The varietal is extensively grown in Argentina, Chile, and Mexico. In Washington state, Tempranillo was one of the varieties pioneered in the state by Red Willow Vineyard in the
Petite mutation Petite mutation petite (ρ–) is a mutant first discovered in the yeast "Saccharomyces cerevisiae". Due to the defect in the respiratory chain, 'petite' yeast are unable to grow on media containing only non-fermentable carbon sources (such as glycerol or ethanol) and form small colonies when grown in the presence of fermentable carbon sources (such as glucose). The petite phenotype can be caused by the absence of, or mutations in, mitochondrial DNA (termed "cytoplasmic Petites"), or by mutations in nuclear-encoded genes involved in oxidative phosphorylation. A neutral petite produces all wild type progeny when crossed with wild type. petite mutations can