The white grape variety originates from Spain. Synonyms are Aidén, Blanc du Zerhoun, Blancón, Burra Blanca, Colgadera, El Biod, El Biodh, El Karim, Forcallada, Forcallat, Forcallat Blanca, Forcallat Blanco, Forcellat Bianca, Laeren de Rey, Manchega, Mantuo Laeren, Valdepeñera Blanca, Valdepeñas and Zerhouni. The exact origin is the Cuenca area in the Castilla-La Mancha region, where it is known as Manchega. It should not be confused with the Forcallat Blanca or Lairén varieties due to apparent synonyms or morphological similarities. The close relationship between Airén, Clairette and Roditis established by analyses carried out in Italy in 1999 is doubted by Swiss biologist Dr José Vouillamoz. According to the latest DNA analyses carried out in 2018, Airén is a direct descendant of Hebén; the second parent is unknown. The Parreira Matias variety was created through presumably natural crossbreeding with Alfrocheiro.
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