The red grape variety (also Weinsberg S 341) is a new cross between Helfensteiner x Heroldrebe (which was confirmed by DNA analyses published in 2012). The cross was made in 1955 by August Herold (1902-1973) at the Lehr- und Versuchsanstalt Weinsberg in Württemberg (Germany). Plant variety protection was granted in 1979. The name goes back to Immanuel A. L. Dornfeld (1796-1869), after whose initiative the viticultural school in Weinsberg was founded. The same parents also created the Hegel variety. Dornfelder was a crossing partner of the new varieties Acolon, Cabernet Dorio, Cabernet Dorsa and Monarch. Dornfelder is one of the most successful new German varieties.
For me, Lexicon from wein.plus is the most comprehensive and best source of information about wine currently available.Egon Mark
Diplom-Sommelier, Weinakademiker und Weinberater, Volders (Österreich)