History
Alvarelhão must have originated in northern Portugal, but little is known of its ancestry. DNA studies have shown some similarity to Esgana Cão.Distribution and Wines
Portugal
In Portugal there are 470 hectares of either Alvarelhão or the grape called Brancelho. It is blended into red wine in the Dão region. It is said to be part of the port wine blend in the Douro, although it is not mentioned on the IVDP website as one of the main 11 red grapes of the Douro.Spain
In Spain Alvarelhão is grown as Brancellao, where they also use the synonym of Albarello.J. Robinson, J. Harding and J. Vouillamoz ''Wine Grapes - A complete guide to 1,368 vine varieties, including their origins and flavours'' It is one of the authorised varieties in the Galician wine regions of Rías Baixas DOP andUnited States
There have been some experiments with the port grapes in California. It is possible that some vines have been misidentified, as the University of California, Davis clone Alvarelhão FPMS 02 has now been confirmed as a Touriga Nacional.Vine and Viticulture
Having evolved in the Dão, the vine is both rough and hardy, having strong defenses against temperature extremes and inclement weather.Synonyms
Alvarelhao, Alvarello, Locaia, Pilongo and Varancelha. German sources, including :de:Brancelho, refer to a Brancelho grape used in Vinho Verde whose synonyms include Alvarelhão Ceitão, Varancelho and Verancelha. It is not certain that this is the same grape as Alvarelhão. Spanish synonyms include Brancellao and Albarello.See also
* Portuguese wine * List of Portuguese wine grape varietiesNotes and references
Further reading
* Robinson, Jancis ''Vines, Grapes & Wines'' Mitchell Beazley 1986External links