The white grape variety (also Freiburg 250-75) is a new breeding between Merzling x GM 6494 (see there the history of origin). It contains genes from Vitis amurensis, Vitis lincecumii, Vitis rupestris and Vitis vinifera. The crossing of the hybrids was done in 1975 by Norbert Becker (1937-2012) at the State Viticulture Institute in Freiburg. The name was given in honour of the German viticultural pioneer Johann Philipp Bronner (1792-1864). It must not be confused with the variety Weiße Bronnertraube. Bronner or the original population was a cross-breeding partner of the new varieties Baron, Cabernet Carbon, Divico, Divona and Prior.
The medium to late ripening vine is resistant to both types of mildew and botrytis. It produces full-bodied, fruity white wines with aromas of ripe apples and a slightly bitter aftertaste. It is cultivated in Belgium, Germany (3 ha), Italy (6 ha), Austria and Switzerland. In 2010, a total of nine hectares of vineyard area were designated (statistics Kym Anderson).
Pictures: Ursula Brühl, Doris Schneider, Julius Kühn Institute (JKI)