Synonym or breeding number (also GM 8331-1) for the grape variety Allegro; see there.
The red grape variety (also Geisenheim 8331-1) is an interspecific new variety between Chancellor (Seibel 7053) x Rondo. It contains genes from Vitis aestivalis, Vitis amurensis, Vitis labrusca, Vitis rupestris and Vitis...
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Dr. Christa Hanten
Fachjournalistin, Lektorin und Verkosterin, Wien