Gamay be an early ripening Californian clone of Pinot noir. Despite similar names the grapes "Gamay du Rhône" and "Gamay St-Laurent" are not the Beaujolais grape either but rather the southwestern France grape Abouriou. In 1929, Gamay was crossed with the table grape Seidentraube (also known as "Luglienga bianca") to produce the white wine grape Regner. Gamay Gamay is a purple-colored grape variety used to make red wines, most notably grown in Beaujolais and in the Loire Valley around Tours. Its full name is Gamay Noir à Jus Blanc. It is a very old cultivar, mentioned as long ago as 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