The red grape variety comes from Germany, The parenthood Bicane x Schiava Grossa was only done by in 2013 DNA analysis clarified. However, this is based on only 20 DNA markers (see under molecular Genetics ). It remains open whether it is a conscious crossing ( new breed ) or one openly bloomed Seedling (random product) acts. In any case, it was done by Johann Philipp Bronner (1792-1864) the selection of the vine. No stocks were shown in 2010 (Kym Anderson ).
Images: Ursula Brühl, Doris Schneider, Julius Kühn Institute (JKI)