Gamay Beaujolais Gamay Beaujolais Gamay Beaujolais is a varietal designation for a Californian grape variety, an early ripening clone of Pinot noir. In the late 1930s, an early pioneer of the American viticulture, Paul Masson, brought with him several Burgundian grapes for his winery in California. One of those grapes he believed to be the Gamay variety from the Beaujolais region in France, which in the 1940s University of California at Davis (UCD) researchers christened "Gamay Beaujolais". In the late 1960s, UCD scientists decided that Gamay Beaujolais was a clonal selection of Pinot noir, and that California's version of the true Gamay
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