The white grape variety is a new breed Malvasia Aromatica di Parma (Muscadelle du Bordelais) x Garnacha according to in 2013 DNA analysis, The parentage Muscadelle x Riesling turned out to be wrong. The identity of the Muscadelle (Muscadelle of California or Muscadelle Bordelais) designated variety that is not with the French Muscadelle (Muscadelle Bordelais) can be confused. Synonyms are California 1139 E 29, Emerald Rizling, Esmerald Riesling, Riesling Izumrudnii and Rizling Izumrudnii. The cross was made in 1936 by Dr. Harold P. Olmo (1909-2006) at the University of California, The productive vine is particularly suitable for warm coastal areas. It produces fine-acidic white wines that are used for blends. The variety was in until the 1970s California widespread in the San Joaquin Valley, today it is cultivated on 60 hectares. There are further stocks in Israel (344 ha) and South Africa (104 ha). In 2010 a total of 508 hectares of vineyards were reported.
Images: Ursula Brühl, Julius Kühn Institute (JKI), Federal Research Center for Cultivated Plants,
Institute for Grapevine Breeding Geilweilerhof - 76833 Siebeldingen, GERMANY