The two varieties are interspecific new varieties, the 1964 by the breeder Vilém crinkly (1924-2013) in the former Czechoslovakia were created. The white grape variety GM 6493 is a crossroads Zarya Severa x Muscat Ottonel, the red grape variety GM 6494 a cross between Zarya Severa x St. Laurent, By both hybrids are genes of Vitis amurensis and Vitis vinifera contain. Both varieties draw high resistance against both mildews and frost hardiness out. Kraus offered the then director of the vine institute Geisenheim (Rheingau) Helmut Becker (1927-1990) some Rebkerne, which recognized the importance of the breeding material and made selections. It was only here that they received their present name and also reached other institutes.
In later research, the head of the State Institute in Freiburg (Baden-Württemberg) Norbert Becker (1937-2012) for the varieties GM 6493 and GM 6494 as the parent variety by mistake Saperavi Severny (instead of rightly Zarya Severa ). Only in the year 2003 was succeeded by its successor Dr. Volker Joerger dioeser error clarified. From the type GM 6494 was due to the high performance of the seedling 6494-5 read and later under the name rondo multiplied as an independent grape variety. The variety GM 6493 was crossing partner in the new breed Solaris, the variety GM 6494 in the new breed Bronner,