The white grape variety comes from Portugal
, Synonyms are Alvadurão Portalegre, Alvaraça Branco, Alvarça, Alvaroço, Asal Espanhol, Batoco, Blanca Mar, Espadeiro Branco (but there is no connection to the red one Espadeiro
), Sa Douro and Sedouro. The parentage is unknown. The late-ripening, low-yielding vine is very susceptible to fungal diseases
, It produces neutral white wines, mainly used as blends. According to in 2009 DNA analysis
it is identical to the Spanish Blanca Mar. The variety is used in the fields Rios do Minho
and Vinho Verde
grown. In 2010, 11 hectares of vineyards were shown with a strongly falling trend (ten years earlier, there were 80 hectares).