Frontenac Gris
Frontenac Gris is a white wine variety . Although the skin of the berries is reddish to red in color, it is assigned to the white varieties similar to the Pinot Gris . Frontenac emerged from a spontaneous mutation of the Frontenac grape variety and was first observed in 1992. The original variety Frontenac was crossed in 1989 by Peter Hemstad, Jim Luby and PR Pierquet from the grape varieties Vitis riparia clone 89 x Landot 4511 . Hemstad, Pierquet and Luby are employees of the University of Minnesota , where Elmer Swenson previously worked. The variety has been approved for commercial cultivation since 2003.
With the clone 89 of the American grape variety Vitis riparia, the vine growers selected a very frost-hardy variety, which they crossed with the French hybrid grape Landot 4511 (also called Landot Noir ). During the trial phase, the new breed had the breeding line number MN 1187.
Frontenac Gris, with the grape varieties Marquette , Frontenac and La Crescent , is now one of four varieties from the University of Minnesota that are used in the cold wine-growing climate of the US Northeast and Canada. Frontenac Gris has been applied for a patent.
Plantations are in the American states of New York ( viticulture in New York ), Connecticut ( viticulture in Connecticut ), Montana ( viticulture in Montana ), South Dakota ( viticulture in South Dakota ), Vermont ( viticulture in Vermont ) and Minnesota ( viticulture in Minnesota ) known. In Canada , the variety is found near Quebec. Even in cold wine-growing climates, the variety develops high must weights of up to 25 degrees Brix , which corresponds to around 100 degrees Oechsle . In warm years this value increases to up to 28 degrees Brix. The alcohol-rich wines are acid-rich and are therefore suitable for the production of residual sweet white wines .
University staff were looking for early maturing and hardy varieties suitable for the northern United States. Frontenac Gris is hardy to at least -35 degrees Fahrenheit (-34 degrees Celsius). Since the roots are less hardy, the variety should be protected by a sufficiently high layer of snow on the ground.
See also the articles Viticulture in Canada and Viticulture in the United States and the list of grape varieties .
Individual evidence
- ↑ Grape plant named 'Frontenac gris' , in English