California wine Department of Viticulture and Enology. The seven leading grape varieties are: Other important red wine grapes include Barbera, Cabernet Franc, Carignan, Grenache, Malbec, Mourvèdre, Petite Sirah, Petit Verdot, Sangiovese, and Tannat. Important white wine varietals include Chenin blanc, French Colombard, Gewürztraminer, Marsanne, Muscat Canelli, Pinot blanc, Pinot gris, Riesling, Roussane, Sémillon, Trousseau gris, and Viognier. Up until the late 1980s, the Californian wine industry was dominated by the Bordeaux varietals and Chardonnay. Sales began to drop as wine drinkers grew bored with the familiarity of these wines. Groups of winemakers like Rhône Rangers and a new wave of Italian winemakers
Petite mutation petite negative mutants. Potentially, these yeasts have a different inheritance system in place for their mitchondrial genome than "S. cerevisiae" does. The frequency at which "S. castellii" spontaneously produces petites is similar to that of "S. cerevisiae", with the mitochondrial DNA of those petites being highly altered via deletion and rearrangement. Suppressive petites of "S. cerevisiae" are the most commonly observed spontaneously created mutants, whereas in "S. castellii," the most commonly observed spontaneous mutant is the neutral petite, further leading to speculation that the transference of this mutation differs between species. Petite mutation petite (ρ–) is a mutant first discovered