Wine is prepared from more than one varieties

Wine is prepared from more than one varieties of Vitis vinifera like Pinot Noir, Chardonnay, Cabernet Sauvignon, Gamay and Merlot. When one of these varieties is used the resultant is termed as varietal. The world's most expensive wines come from the regions like Bordeaux and Rhone Valley are blended from different varieties of the same vintage. Wine can also be prepared from the hybrid varieties of grapes obtained by genetic cross breeding. Vitis labrusca, Vitis aestivalis, Vitis rupestris, Vitis rotundifolia and Vitis riparia are native North American varieties of grapes grown for the production of jams, jellies or sometimes wine.

Hybridization is a different process so cannot be confused with grafting. Most of the world's grape vineyards are planted with the European variety of grapevine Vitis vinifera grafted with the North American species rootstock. This is basically done because the North American species are resistant to Phyllosera a root louse that damages the roots of grapevines resulting in death. In the late 19th century most of the vineyards of Europe were destroyed by a bug leading to deaths of grapevines and heavy economic loss. Grafting is a common practice in all wine producing nations except Argentina, Chile and Canary Islands and only these areas include vineyards free from any devastating pests. Associated with wine production terroir is an important concept that includes variety of grapevine to be used, elevation and shape of vineyard, type and chemistry of soil, climate and seasonal conditions and the local yeast cultures to be used. The fermentation, ageing and processing of wine in terroir may result in good wine production.

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