Chilean wine and a minimum of six years for "gran vino." Over twenty grape varieties are grown in Chile, mainly a mixture of Spanish and French varieties, but many wineries are increasing experimentation in higher numbers. For most of Chile's history, Pais was the most widely planted grape only recently getting passed by Cabernet Sauvignon. Other red wine varieties include Merlot, Carménère, Zinfandel, Petite Sirah, Cabernet franc, Pinot noir, Syrah, Sangiovese, Barbera, Malbec, and Carignan. White wine varieties include Chardonnay, Sauvignon blanc, Sauvignon vert, Sémillon, Riesling, Viognier, Torontel, Pedro Ximénez, Gewürztraminer and Muscat of Alexandria. Chilean winemakers have been developing a distinct
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