The white grape variety originates from France. Synonyms are Bonne Roussette d'Ayze, Grosse Roussette, Maclon, Riusse, Riussette. It must not be confused with other grape varieties with the name part Roussette. Pierre Galet 's (1921-2019) assumption that it is an early-maturing mutation of the Mondeuse Blanche variety was refuted in 2009. There is possibly a parent-offspring relationship with the Ondenc variety. According to DNA analyses carried out in 2013, it is a presumably natural cross between Altesse x Gouais Blanc. However, this is based on only 20 DNA markers (see molecular genetics). The early ripening vine is susceptible to fungal diseases such as downy mildew and botrytis. It produces white wines with high acidity, which are mainly used in sparkling wine production. The variety, which is threatened with extinction, is cultivated in the Savoie region, where it is permitted in the two areas of Bugey and Vin de Savoie. In 2016, only one hectare of vines was still designated (Kym Anderson statistics).
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