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Interspecific crossing

interspécifique croisement (F)
interspecific crossing, interspecific variety (GB)

Designation for one crossing between two grape varieties of different species. These are combinations between the European Vitis vinifera and an American or an Asian species. But also crossings between two different ones American (eg Vitis labrusca x Vitis rupestris ) or Asian (for example Vitis amurensis x Vitis coignetiae ) or between American and Asian species (for example Vitis amurensis x Vitis riparia) are interspecific crosses (inter = between). As a rule, only interspecific cross products are used in general parlance hybrids designated.

interspecific crossing - Seyval Blanc x Chardonnay = Chardonel

The crossover result of different grape varieties of the same species among themselves, for example of two varieties of the only European species Vitis vinifera, is called intraspecific crossing (intra = within). For example, the intraspecific junction has Riesling x Madeleine Royale the variety Müller-Thurgau result. Strictly speaking, these intersections are also hybrids although they are hardly so called.

On the other hand, a cross between genera is called an intergeneric crossing ; for example between the two Vitis subgenera Vitis subg. Vitis and Vitis subg. Muscadinia (see below Muscadinia ). However, this is relatively rare because crosses due to different numbers of chromosomes are very difficult. An example is the new breeding of the Unterlagsrebe Nemadex Alain Bouquet,

For interspecific intersections must be in accordance with EU Regulation Vitis vinifera shares may be included. Whether such varieties also for quality wine or country wine are the responsibility of the member states. See under Quality wine-grape varieties; such as Vines systematics and breeding,

Pictures: Ursula Bruehl, Doris Schneider, Julius Kühn Institute (JKI)

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