They started with only two varietals, Cabernet Sauvignon and Sauvignon Blanc. Portugal has a large array of native varietals, producing an abundant variety of different wines. Using Phylloxera-resistant rootstock, the vineyards were replanted with quality vines of single varietals. These grape varietals are typical within the region. Colorado wines include award-winning varietals that have attracted favorable notice from outside the state. Merlot is also one of the most popular red wine varietals in many markets. In Oregon, the requirement is 90% for certain varietals, such as pinot noir. Amador County is renowned for its Zinfandel, but many other varietals are produced as well. Marsala is produced using the Grillo, Inzolia, Catarratto and Damaschino white grape varietals, among others. Historically cultivated local wine varietals include Malvasia (white) and Teran (red). Kieffer pears and apple varietals are used to make pear butter and apple butter. For a list of reported North American subspecies and varietals, see "USDA Plants Profile". The red varietals are the most common. Selective sweeps provide a baseline from which different varietals could have emerged. Roussanne, both of which are white varietals.