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Bianchetta Trevigiana
Bianchetta Trevigiana is a white Italian wine grape variety that is grown in the Trentino-Alto Adige/Südtirol and Veneto wine regions of northeast Italy. Here the grape is rarely used a varietal but, instead, is a permitted blending grape adding acidity to the wines of several ''Denominazione di Origine Controllata'' (DOC) zones including the sparkling wine Prosecco and has also been used for vermouth production. The name ''Trevigiana'' is derived from the province of Treviso where the grape is believed to have originated from.〔J. Robinson, J. Harding and J. Vouillamoz ''Wine Grapes - A complete guide to 1,368 vine varieties, including their origins and flavours'' pgs 102-103, 1130 Allen Lane 2012 ISBN 978-1-846-14446-2〕
While there are several grape varieties that variously share the synonym ''Bianchetta'', most notably the Sicilian wine grape Albarola, DNA analysis has shown no direct genetic relationship between Bianchetta Trevigiana and any of the other Bianchetta varieties. Likewise, despite sharing the synonym ''Vernaccia'' (the root of which translate to "vernacular" or "local"〔Oz Clarke ''Encyclopedia of Grapes'' pg 273 Harcourt Books 2001 ISBN 0-15-100714-4〕) with the notable Tuscan and Sardinian wine grapes, Biancheta Trevigiana appears to have no close relationship with any of those varieties. Instead, ampelographers believe that the grape is the result of a natural crossing between the white Veneto wine grape Durella and the nearly extinct red wine grape Brambana.〔
==History==
Ampelographers believe that first written account of Bianchetta Trevigiana was in the late 17th century under the synonym of ''Bianchetta Gentile''. The name ''Bianchetta'' means "little white" with Gentile coming from the Latin term for "family" so this reference could be about several vines of "little white berries" that shared similar characteristics in the vineyard. The 1679 account from Italian writer Agostinetto di Cimadolmo described Bianchetta Gentile as growing in the Treviso region.〔 The first detailed account of Bianchetta Trevigiana was in 1937 by grape-breeder Giovanni Dalmasso at the Istituto Sperimentale per la Viticoltura in Conegliano.〔Wein-Plus ''"(Bianchetta Treviso )"'' Glossary. Accessed: April 18th, 2014〕
In 2003, isoenzymatic analysis revealed that several grape varieties growing in northeast Italy under the synonyms of ''Senese'', ''Vernanzina'' and ''Vernassina'' were, in fact, Bianchetta Trevigiana while other grape varieties variously known as ''Bianchetta'', such as the Albarola grape of Sicily, were distinct and not closely related. In 2010, further DNA analysis suggested that Bianchetta Trevigiana was probably the result of a natural crossing between the white Durella grape of the Veneto region and the nearly extinct red-berried Brambana grape.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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