grape variety that was discovered in Switzerland in the late 20th century. In 1977 a vine producing 'bronze' grapes was found in the vineyards of Cleggett Wines in Australia. They propagated this mutant, registered it under the name of Malian, and sold pale red wines under that name. In 1991 one of the Bronze Cabernet vines started producing white grapes. Cleggett registered this "White Cabernet" under the name of Shalistin. Compared to its Cabernet parent, Malian appears to lack anthocyanins in the subepidermal cells but retains them in the epidermis, whereas Shalistin has no anthocyanins in either layer. The team that went on to discover the VvMYBA1 and VvMYBA2 genes that control grape colour have suggested that a gene involved in anthocyanin production has been deleted in the subepidermis of Malian, and then subepidermal cells invaded the epidermis to produce Shalistin. During a series of trials between 1924 and 1930, the pollen of Cabernet Sauvignon was used to fertilize Glera vines (the white wine grape used to make the sparkling wine Prosecco) to create the red Italian wine grape Incrocio Manzoni 2.15. In 1972, the Australian agency CSIRO crossed Cabernet Sauvignon grapes with the Spanish Sumoll variety to create three new varieties: Cienna, Tyrian and Rubienne. In 1983, Cabernet Sauvignon was crossed with the white German wine grape Bronner to create the white wine grape Souvignier gris. Viticulture While Cabernet Sauvignon can grow in a variety of climates, its suitability as a varietal wine or as a blend component is strongly influenced by the warmth of the climate. The vine is one of the last major grape varieties to bud and ripen (typically 1–2 weeks after Merlot and Cabernet franc), and the climate of the growing season affects how early the grapes will be harvested. Many wine regions in California give the vine an abundance of sunshine with few problems in ripening fully, which increases the likelihood of producing varietal Cabernet wines. In regions like Bordeaux, under the threat of inclement harvest season weather, Cabernet Sauvignon is often harvested a little earlier than ideal and blended with other grapes to fill in the gaps. In some regions, the climate will be more important than the soil. In regions that are too cool, there is a potential for more herbaceous and green bell pepper flavours from less than ideally ripened grapes. In regions where the grape is exposed to excess warmth