Tempranillo blanco region came to an agreement that would allow the planting and use of Tempranillo blanco in white Rioja wines produced under the DOC labels. Tempranillo blanco was one of three native white varieties added to permitted list of Rioja grapes--Maturana Blanca and Turruntes being the others. Additionally, Maturana Tinta, Maturano, Monastel, Chardonnay, Sauvignon blanc and Verdejo were added with Tempranillo blanco in the first major change of the Rioja wine laws involving grape varieties since the wine region was officially established in 1925. Under the DOC rules, in order to have new plantings of Tempranillo blanco vineyards must pull up
Petite mutation and exhibit Mendelian 1:1 segregation. Neutral petites (rho–N): Neutral petite when crossed to wild-type, all offspring are wild-type. It has inherited normal mitochondrial DNA from wild-type parent, which is replicated in the offspring. Suppressive petites (rho–S): crosses between petite and wild-type, all offspring are petite, showing "dominant" behavior to suppress wild-type mitochondrial function. Most petite mutants of "S. cerevisiae" are of a suppressive type, and they differ from neutral petite by affecting the wild-type, although both are a mutation in mitochondrial DNA. Mitochondrial genome of yeast will be the first eukaryotic genome to be understood in terms of both structure