Gamay Blanc Gloriod Gamay Blanc Gloriod Gamay Blanc Gloriod is an obscure French variety of white wine grape. Very little of it is grown commercially. It is named after Émile Gloriod, who discovered it as a seedling; it was originally thought to be a white version of the Gamay grape. "Gamay Blanc" was already used as an alternative name for Chardonnay, which is another white grape that looks like Gamay. The gardener Émile Gloriod, from Gy in Haute-Saône, discovered Gamay Blanc Gloriod in 1895. At first it was thought to be a seedling of Gamay, and conventional ampelography linked it to the Melon
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