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Malvasia Preta 01 was imported to Davis in 1981 by Dr. Harold Olmo from Cockburn Co., Tua (Douro) Oporto, Portugal. The original material underwent heat treatment for 62 days but eventually tested positive for leafroll and Rupestris stem pitting viruses. New plants were then created in 2007 using microshoot tip tissue culture disease elimination therapy. Malvasia Preta 01 successfully completed testing in 2011 and was planted in the Classic Foundation Vineyard. Malvasia Preta 01 successfully completed testing under the 2010 Protocol in 2011 and was planted in the Russell Ranch Foundation Vineyard as Malvasia Preta 01.1.
Malvasia Preta is a black Portuguese grape cultivar. The name Malvasia has been used as a varietal name for many cultivars, as a reference to a special taste or aromatic flavor for a grape cultivar. Lacombe T. et al. 2007. Relationships and Genetic Diversity within the Accessions Related to Malvasia Held in the Domaine de Vassal Grape Germplasm Repository, Am.J.Enol.Vitic. 58:1. The Vitis International Variety Catalogue at Geilweilerhof, Germany, shows an entry for a cultivar with the prime name Mureto (synonym Malvasia Preta), as well as a separate entry for Malvasia Preta as the prime name (synonym Moreto). The cultivar with prime name Mureto (syn. Malvasia Preta) is a product of a cross between Alfrocheiro and Jaén blanco (Cayetana blanca). The DNA profile for the Malvasia Preta FPS 01/01.1 is consistent with the profile of the Mureto accession (synonym Malvasia Preta) in the collection at Domaine de Vassal Grape Germplasm Repository in France. |
