The white grape comes from Portugal
, Synonyms are Alvadurão Portalegre, Alvaraça Branco, Alvarça, Alvaroço, Asal Espanhol, Batoco, Blanca Mar, Espadeiro Branco (but there is no link to the red 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 used mainly as blends. According to done in 2009 DNA analysis
it is identical to the Spanish Blanca Mar. The variety is in the ranges Rios do Minho
and Vinho Verde
grown. In 2010, 11 hectares of vineyards were reported with sharply falling tendency (ten years earlier, there were still 80 hectares).