What is "nobling"

Nobling is a white German wine grape variety that is a crossing between Silvaner and Chasselas. The variety was created in 1940 at the Staatliches Weinbauinstitut Freiburg in Baden-Württemberg by grape breeder Johannes Zimmermann. It is primarily found in the Baden wine region but its number have been declining for most of the late 20th and early 21st century from its high point of 100 hectares (250 acres) in the late 1970s.