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Barbera bianca
Barbera bianca is a white Italian wine grape variety that is grown in the Piedmont wine region of northwest Italy. Despite being named ''Barbera bianca'', the grape is not a color mutation of the red Piedmontese wine grape Barbera that is the third most widely planted grape variety in Italy. In fact, DNA analysis conducted in the early 21st century shows no genetic relationship at all between the two grape varieties.〔J. Robinson, J. Harding and J. Vouillamoz ''Wine Grapes - A complete guide to 1,368 vine varieties, including their origins and flavours'' pgs 85–88, 187 Allen Lane 2012 ISBN 978-1-84614-446-2〕
Barbera bianca is noted for its high acidity levels, the vast majority of it tartaric rather than malic acid. This propensity for high acid lends the grape well to sparkling wine production. Barbera bianca is a permitted grape variety in the ''Denominazione di origine controllata'' (DOC) wines of Colli Tortonesi produced in the province of Alessandria.〔
==History==
The exact origins of Barbera bianca are not yet known but the grape has been growing in the Piedmont region of Italy since at least the early 19th century when it was described in an 1825 document. Ampelographers believe that the grape got its name due to morphological similarities with Barbera, particularly the size and shape of the berries and grape clusters of both vines. However, DNA profiling in the early 21st century showed that the two grapes are distinct varieties with no known genetic relationship between them.〔
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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