The red grape variety originates from Portugal. Synonyms are Arruya, Casculo, Moreto (see there), Moreto d'Alenteijo, Moreto d'Alentejo, Morito, Mureto, Mureto do Alentejo and Tinta de Alter. According to DNA analyses carried out in 2013, it is a presumably natural cross between Jaén Blanco (Cayetana Blanca) x Alfrocheiro....
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