Synonym or breeding number (also GM 7116-26) for the grape variety Prinzipal; see there.
The white grape variety (also Geisenheim 7116-26) is a new breeding between Geisenheim 323-58 (Seibel 7053 = Chancellor x Riesling) x Ehrenfelser. It contains genes from Vitis labrusca, Vitis lincecumii, Vitis rupestrisVitis...
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Roman Horvath MW
Domäne Wachau (Wachau)