The white grape variety is a new variety between Schiava Grossa (Trollinger) x Riesling, which was confirmed by DNA analyses carried out in 2012. Synonyms are Herold Triumpf, Kerner Bijeli, Kernerrebe, Weinsberg S 25 and (first name) Weißer Herold. The cross was made in 1929 at the State Teaching and Research Institute in Weinsberg (Württemberg) by August Herold (1902-1973). The plant variety protection was granted in 1969. The name was given after the Swabian doctor and wine writer Justinus Kerner (1786-1862), who lived in Weinsberg. Rotberger and Witberger were born from the same parents. Kerner was a crossing partner of the new breeds Juwel, Roter Milan and Silcher. One mutation is Kernling.
The medium to late ripening vine is susceptible to powdery mildew and tends to the so-called Kerner disease, but is resistant to frost. It produces a riesling white wine with a light note of candy and aromas of orange peel and good quality potential. Due to its special aromatic properties, it is also known as a so-called bouquet variety. In 2009, the cultivated area in Germany was 3,584 hectares, in 2000 it was twice as much. In 2010 there were also other stocks in England (6 ha), Japan (357 ha), California, Canada (11 ha), Austria, Switzerland (19 ha), Slovenia (2 ha) and South Africa. The total area under cultivation in 2010 was 3,994 hectares, ranking 126th in the global grape variety ranking.
Source: Wine Grapes / J. Robinson, J. Harding, J. Vouillamoz / Penguin Books Ltd. 2012
Pictures: Ursula Brühl, Doris Schneider, Julius Kühn Institute (JKI)