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Research Article

Sensory Analysis of Riesling Wines from Different Sub-Appellations in the Niagara Peninsula in Ontario

James J. Willwerth, Andrew G. Reynolds, Isabelle Lesschaeve
Am J Enol Vitic. August 2015 66: 279-293; published ahead of print April 23, 2015 ; DOI: 10.5344/ajev.2015.14081
James J. Willwerth
1Senior Scientist in Viticulture and, Brock University, St. Catharines, ON, Canada L2S 3A1
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Andrew G. Reynolds
2Professor, Cool Climate Oenology and Viticulture Institute, Brock University, St. Catharines, ON, Canada L2S 3A1
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  • For correspondence: areynold@brocku.ca
Isabelle Lesschaeve
3Adjunct Professor, Department of Food Science, University of Guelph, Guelph, ON, Canada.
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Abstract

Potential terroir effects are described that might impact Riesling wine varietal character. In 2005, the Vintners Quality Alliance of Ontario created putative sub-appellations within the Niagara Peninsula based on soil and climate. The objective of this research was to determine differences that might validate sub-appellation designations. It was hypothesized that differences in fruit composition and wine sensory attributes would be found among these sub-appellations. This was tested in 10 commercial Riesling vineyards representative of each sub-appellation from which wines were made in 2005 and 2006. Vineyards were delineated using GPS and 75 to 80 sentinel vines were georeferenced within a sampling grid. An assumption was that vine water status would play a major role in the terroir effect; therefore, wines were made from vines of similar water status based on leaf water potential. A standard winemaking protocol was used to minimize enological effects. Descriptive analysis using a trained panel indicated that sub-appellation affected wine sensory profiles for both vintages. Thirteen aroma, flavor, and taste attributes differed among sub-appellations in 2005 and 11 aroma, flavor, and taste attributes differed in 2006. In both vintages, musts and wines also differed among sub-appellations in chemical composition (titratable acidity, pH, and free and potentially volatile terpenes). Through principal component analysis and partial least squares regression, specific sensory and chemical attributes and vineyard variables were associated with wines from the different sub-appellations. However, wines were grouped by their generalized regional designation (Lakeshore, Escarpment, or Lake Plain) within the Niagara Peninsula. Similar sensory profiles were found in these appellations, suggesting wines classified by their place of origin on the Niagara Peninsula should exhibit specific varietal characteristics regardless of growing season.

  • geographic origin
  • fruit composition
  • multivariate statistics
  • sensory analysis
  • terroir
  • ©2015 by the American Society for Enology and Viticulture
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Sensory Analysis of Riesling Wines from Different Sub-Appellations in the Niagara Peninsula in Ontario
James J. Willwerth, Andrew G. Reynolds, Isabelle Lesschaeve
Am J Enol Vitic.  August 2015  66: 279-293;  published ahead of print April 23, 2015 ; DOI: 10.5344/ajev.2015.14081

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Sensory Analysis of Riesling Wines from Different Sub-Appellations in the Niagara Peninsula in Ontario
James J. Willwerth, Andrew G. Reynolds, Isabelle Lesschaeve
Am J Enol Vitic.  August 2015  66: 279-293;  published ahead of print April 23, 2015 ; DOI: 10.5344/ajev.2015.14081
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