Prosecco sparkling wine made from Glera
|Color of berry skin||Blanc|
|Also called||Prosecco and other synonyms|
Glera, also known as Prosecco, is a white variety of grape of Slovenian origin, which was brought to the village of Prosecco (Slovene: Prosek) from Slovenia's Karst region. The variety was formerly mostly referred to as Prosecco, but in the EU was renamed "Glera" in 2009 to make room for the protection of "Prosecco" as the name of a geographically-protected wine.
Glera is a rather neutral grape variety which is mainly cultivated for use in sparkling Italian wine styles, frizzante or spumante, from the various Prosecco DOCG and DOC areas, although still wines also exist. It is grown mainly in the Veneto region of Italy, traditionally in an area near Conegliano and Valdobbiadene, in the hills north of Treviso.
Glera is believed to be an old variety, and the name Prosecco was derived from the village Prosecco near Trieste, where the grape may have originated. It has been proposed that it was cultivated already in Roman times, possibly as the vinum pucinum praised by Pliny the Elder, although that is not known with any certainty. It ranks about thirtieth in importance among the country's some 2,000 grape varieties.
Prosecco was traditionally used as the name for both the grape variety and the sparkling wine produced primarily from it. Prosecco di Conegliano-Valdobbiadene, Prosecco di Conegliano and Prosecco di Valdobbiadene all had DOC status, and there was also an IGT zone surrounding it. When the higher DOCG status was sought for Prosecco di Conegliano e Valdobbiadene, it became a complication that the grape (which had become cultivated over a larger area) and the protected designation of origin had the same name. To resolve the issue, within the EU the old synonym Glera was officially adopted for the variety at the same time as the DOCG was approved in 2009. The change was also made to reduce the possibility of sparkling wines of other origin being labelled "Prosecco" by using the grape variety's name.
The name change was rejected by Australian wine producers, and leading wine experts including Jancis Robinson MW, Julia Harding MW and José Vouillamoz, who continue to refer to the grape variety as 'Prosecco'. 
Relationship to other grapes
Glera is a parent variety of two Manzoni grapes, the red wine grape variety Incrocio Manzoni 2.15 (a crossing with Cabernet Sauvignon) and another red skinned variety known as Incrocio Manzoni 2.14 (a crossing with Cabernet Franc).
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