The white grape variety originates from the border region Italy/Switzerland. Synonyms are Blanc de Maurienne (Savoy), Petit Prié Tardif, Regis, Resi, Rèze Blanc, Rèze Blanche, Rèze Jaune, Rèze Vert, Rèze Verte and Rèzi. According to several DNA analyses, a parent-offspring relationship was established with the varieties Arvine, Arvine Grande, Diolle (all three Valais), Cascarolo Bianco (Piedmont), Groppello di Revò and Nosiola (both Trentino). According to DNA analyses carried out in 2009, the Blanc de Maurienne variety grown in Savoy is identical. It is also likely to be related to the Piedmontese variety Freisa. This is also proven by the earlier wide distribution and the high age of the vine. In 2008 a colour mutation with red berries was found.
This is one of the oldest varieties in the Alps; it is also counted in the Swiss Valais in the Old Growths grape variety group. As early as 1313, it was mentioned in the "Verzeichnis von Anniviers" under the name "Regy" together with the varieties Neyrun (?) and Humagne Blanche. According to an unverifiable hypothesis, it is said to be a descendant of the Uva raetica mentioned by Pliny the Elder (23-79), from which the famous ancient wine Raeticum was made. The medium to late ripening vine is susceptible to botrytis. It produces an acidic white wine with aromas of gooseberries and green apple. In Valais, the variety was still very common in the 19th century before the phylloxera. It is used here in Vin des Glaciers (glacier wine). However, no stocks were recorded in 2010 (Kym Anderson).
Source: Wine Grapes / J. Robinson, J. Harding, J. Vouillamoz / Penguin Books Ltd. 2012
Pictures: Ursula Brühl, Doris Schneider, Julius Kühn Institute (JKI)