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Frontenac (grape)
Frontenac is an interspecific hybrid grapevine that is a result of research and cross-breeding by the University of Minnesota. It was grown from a crossing of the complex interspecific hybrid Landot 4511 and a very cold hardy selection of Vitis riparia. It was released in 1996.
Frontenac gris is a white wine version of Frontenac, introduced in 2003. It started as a single bud mutation of Frontenac, yielding gray (thus named gris) fruit and amber-colored juice.〔(Frontenac Gris : Grapes: University of Minnesota )〕 Frontenac blanc will be introduced in 2012 from white fruited mutations found in both Frontenac and Frontenac gris vines in Minnesota and Canada.〔(Frontenac blanc : Grapes : University of Minnesota )〕
== Vine and viticulture ==
The vines produce loose clusters of dark, highly acidic, high sugar berries. Frontenac is quite vigorous, extremely cold hardy (below -30C), highly resistant to downy mildew, and resistant to powdery mildew and botrytis. Frontenac grapes are much smaller than traditional grapes and grow in tight clusters. Frontenac grapes produce a mild grape flavor.
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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