The red grape variety comes from Italy. Synonyms are Brunetta, Nerét, Nerét Gros, Neretto, Neretto di San Giorgio and Neretto Nero. It must not be confused with the varieties Neret di Saint-Vincent, Neretto Duro, Neretto Gentile or Neretto Nostrano, despite the fact that synonyms or morphological similarities seem to indicate this. According to DNA analyses carried out in 2004, it probably originated from a cross between Nebbiolo x unknown (extinct) variety). A presumed relationship with Sciaccarello(Mammolo) is doubtful according to the biologist Dr. José Vouillamoz. The variety is named after the municipality of Bairo in the province of Torino in Piedmont. It is authorised there in the DOC wines Canavese and Pinerolese. The area under cultivation in 2010 was 34 hectares, with a sharp downward trend (Kym Anderson).
Source: Wine Grapes / J. Robinson, J. Harding, J. Vouillamoz / Penguin Books Ltd. 2012
Pictures: M.I.P.A.A.F - National Vine Certification Service