Hybrid grapes are grape varieties that are the product of a crossing of two or more Vitis species. This is in contrast to crossings between grape varieties of the same species, typically Vitis vinifera , the European grapevine. Hybrid grapes are also referred to as inter-species crossings or "Modern Varieties." Due to their often excellent tolerance to powdery mildew, other fungal diseases, nematodes, and phylloxera, hybrid varieties have, to some extent, become a renewed focus for European breeding programs. The recently developed varieties (Rondo and Regent) are examples of newer hybrid grape varieties for European viticulturalists. Several North American breeding programs, such as those at Cornell and the University of Minnesota, focus exclusively on hybrid grapes, with active and successful programs, having created hundreds if not thousands of new varieties.
Hybrid varieties exhibit a mix of traits from their European, Asiatic, and North American parentage. Those varieties which derive from Vitis labrusca parentage (such as those still used in the production of Austrian Uhudler) have a strong "candied" or "wild strawberry" aroma, while those that derive from Vitis riparia often have a herbaceous nose with flavours reminiscent of black currants. Most hybrid grape varieties struggle to produce adequate tannin for red wine production, and usually display a level of acidity that exceeds what consumers of wines produced from Vitis vinifera are accustomed to. These attributes proved unpopular in Europe, and were among the factors that led to the prohibition of the commercial growth of hybrid vines in many countries in Europe.
During the first half of the 20th century, various breeding programs were developed in an attempt to deal with the consequences of the Phylloxera louse, which was responsible for the destruction of European vineyards from 1863 onwards. After extensive attempts, grafting European varieties onto North American rootstock proved to be the most successful method of dealing with the problem.
However, hybrid grape varieties were introduced as a solution to many of the viticulture problems of shorter-season, cooler and more humid wine regions, such as those in the northeast and Pacific Northwest of North America. From the 1950s onwards, grape varieties such as De Chaunac, Baco noir, Marechal Foch, Vidal, etc. have been a staple of the wine industries in Ontario, New York, Pennsylvania, etc. Only since the 1970s and 1980s have vinifera varieties begun to displace hybrid grapes in this area. Even in those areas where Vitis vinifera now predominates, hybrid varieties still have "cult following" with some wine consumers. Furthermore, in some cases hybrid grapes are used to produce unique and exceptional products; for example, ice wine produced from Vidal blanc or Vignoles in Ontario and New York. Hybrid grapes are expanding in traditional vinifera wine regions, because they can be easier to grow and can ripen earlier than vinifera (which reduces bird predation and reduces the risk of fruit hanging into the Fall rains), and because they typically have much more disease resistance (thereby requiring less spraying, which lessens tractor fuel usage and the volume of spray applications). Therefore, hybrid grapes are considered a "Green" alternative to vinifera grapes.
The best-known grape species in reference to viticulture include:
While rare, interspecific hybrid vines can result in the wild from cross-pollination. Due to the abundance of American Vitis species one finds such natural hybrid vines on the American continent. The majority of the well-known hybrid vines however, have been artificially created. The earliest named hybrid in America was the Alexander grape, discovered around 1740 near a vineyard planted for William Penn along the Schuylkill.
Aurore is a white complex hybrid grape variety produced by French viticulturist Albert Seibel and used for wine production mostly in the United States and Canada. Over a long lifetime, Seibel produced many complex hybrid crosses of Vitis vinifera to American grapes. The Aurore grape is a cross of Seibel 788 and Seibel 29.
Baco noir is a hybrid red wine grape variety produced by Francois Baco from a cross of Vitis vinifera var. Folle blanche, a French wine grape, and an unknown variety of Vitis riparia indigenous to North America.
Seyval blanc is a hybrid wine grape variety used to make white wines. Its vines ripen early, are productive and are suited to fairly cool climates. Seyval blanc is grown mainly in England, the United States east coast, in the Pacific Northwest (Oregon), as well as to a lesser extent in Canada. Seyval blanc was created either by Bertille Seyve, or his son-in-law Villard, as a cross of Seibel 5656 and Rayon d'Or, and was used to create the hybrid grape St. Pepin. Seyve and Villard used the same Rayon d'Or x Seibel 5656 crossing to produce the red wine grape Seyval noir.
Seibel grapes are a group of wine grape varieties which originated with the work of French viticulturist Albert Seibel crossing European wine grape with American grape species to increase disease resistance. They were planted widely in France during the 1950s but have seen decline in recent years because French wine law prohibits hybrid grapes in appellation wine. The grapes are still commonly used as blending grapes in table wine and mass commercial wines. New Zealand, England, and Canada also have plantings of Seibel grapes.
Baco blanc or Baco 22A is a French-American hybrid grape variety. It is a cross of Folle blanche and the Noah grape, created in 1898 by the grape breeder François Baco. Folle blanche is its Vitis vinifera parent. Noah, its other parent, is itself a cross of Vitis labrusca and Vitis riparia.
Vitis labrusca, the fox grape, is a species of grapevines belonging to the Vitis genus in the flowering plant family Vitaceae. The vines are native to eastern North America and are the source of many grape cultivars, including Catawba, Concord, Delaware, Isabella, Niagara, and many hybrid grape varieties such as Agawam, Alexander and Onaka. Among the characteristics of this vine species in contrast to the European wine grape Vitis vinifera are its "slip-skin" that allows the skin of the grape berries to easily slip off when squeezed, instead of crushing the pulp, and the presence of tendrils on every node of the cane. Another contrast with European vinifera is the characteristic "foxy" musk of V. labrusca, best known to most people through the Concord grape. This musk is not related to the mammalian fox, but rather to the strong, earthy aromas characteristic of the grapes that were known by early European-American settlers in the New World. The term "foxy" became a sort of catchall for the wine tasting descriptors used for these American wines that were distinct from the familiar flavors of the European viniferous wines.
Vitis riparia Michx, with common names riverbank grape or frost grape, is a vine indigenous to North America. As a climbing or trailing vine, it is widely distributed across central and eastern Canada and the central and northeastern parts of the United States, from Quebec to Texas, and eastern Montana to Nova Scotia. There are reports of isolated populations in the northwestern USA, but these are probably naturalized. It is long-lived and capable of reaching into the upper canopy of the tallest trees. It produces dark fruit that are appealing to both birds and people, and has been used extensively in commercial viticulture as grafted rootstock and in hybrid grape breeding programs.
Vidal blanc is a white hybrid grape variety produced from the Vitis vinifera variety Ugni blanc and another hybrid variety, Rayon d'Or. It is a very winter-hardy variety that manages to produce high sugar levels in cold climates with moderate to high acidity.
New York wine refers to wine made from grapes grown in the U.S. state of New York. New York ranks third in grape production by volume after California and Washington. 83% of New York's grape area is Vitis labrusca varieties. The rest is split almost equally between Vitis vinifera and French hybrids.
Vicomte Fernand Adhémar Ferdinand Antoine de Chaunac de Lanzac was a French-born Canadian wine pioneer who helped lay the groundwork for a successful wine industry in Ontario and other eastern North American wine regions.
Villard grapes are French wine hybrid grape created by French horticulturist Bertille Seyve and his father-in-law Victor Villard. They include the dark-skinned Villard noir and the white-wine variety Villard blanc with both being members of the Seyve-Villard grape family. Villard noir is a cross of two other French hybrids, Siebel 6905 and Seibel 7053 created by physician and viticulturist Albert Seibel. Like Villard noir, Villard blanc was produced as a crossing of two Seibel grapes, in this case, Le Subereux and Seibel 6468.
Couderc noir is a red wine hybrid grape that was formerly grown primarily in the South West France wine region and around the Gard département in the Languedoc-Roussillon region. The vine produces high yields and ripens late, creating a wine that is deeply colored with a distinct, earthy flavor. Couderc noir is normally used for mass commercial and table wines.
Cascade is a red complex hybrid grape variety that was created by French viticulturist Albert Seibel in the early 20th century in Aubenas, Ardèche, in the Rhône Valley. It has been commercially available in North America since 1938 and has since been planted in Canada and the United States. However, in warmer climates, the grape is highly susceptible to a number of grapevine viruses, which has discouraged plantings of the variety.
Landot noir is a red hybrid grape variety that is a crossing of Landal and Villard blanc. Created after a series of trials between 1929-1949, the grape was introduced to Canada and the United States in the 1950s and today can be found in Quebec as well as New Hampshire where a varietal is produced by Jewell Towne Vineyards.
Ravat blanc is a white hybrid grape variety that is a crossing of Chardonnay and a Seibel grape. While the Vitis International Variety Catalogue (VIVC) maintained by the Geilweilerhof Institute for Grape Breeding list Seibel 5474 as the second parent, Master of Wine Jancis Robinson notes that other authors list Seibel 8724 as the parent. The grape is often confused with the white hybrid grape Vignoles that is often called just Ravat.
Seyval noir is a red hybrid grape variety that was created in the late 19th century by French horticulturalist Bertille Seyve and his father-in-law Victor Villard from a crossing of two Seibel grapes. The pair used the same two variety to create the white wine grape Seyval blanc making the two siblings rather than color mutations of one or the other. The name Seyval comes from a combination of the two men's names.
Muscat bleu is a red Swiss wine and table grape variety that is a hybrid of Garnier 15-6 and Perle noire. The grape was developed in Peissy in the Canton of Geneva by Swiss grape breeder Charles Garnier in the 1930s. Today the grape is used as both a table grape and for winemaking, producing wines that Master of Wine Jancis Robinson describe as "soft and grapey". Outside Switzerland some plantings of Muscat bleu can also be found in Belgium.
L'Acadie blanc is a white Canadian wine grape variety that is a hybrid crossing of Cascade and Seyve-Villard 14-287. The grape was created in 1953 by grape breeder Ollie A. Bradt in Niagara, Ontario at the Vineland Horticultural Research Station which is now the Vineland Research and Innovation Centre. Today the grape is widely planted in Nova Scotia with some plantings in Quebec and Ontario. Some wine writers, including those at Appellation America, consider L'Acadie blanc as "Nova Scotia’s equivalent to Chardonnay".
The propagation of grapevines is an important consideration in commercial viticulture and winemaking. Grapevines, most of which belong to the Vitis vinifera family, produce one crop of fruit each growing season with a limited life span for individual vines. While some centenarian old vine examples of grape varieties exist, most grapevines are between the ages of 10 and 30 years. As vineyard owners seek to replant their vines, a number of techniques are available which may include planting a new cutting that has been selected by either clonal or mass (massal) selection. Vines can also be propagated by grafting a new plant vine upon existing rootstock or by layering one of the canes of an existing vine into the ground next to the vine and severing the connection when the new vine develops its own root system.