Objective 1: Document cold climate varietal performance in the variable climates and understand the resulting sensory characteristics of the fruit and wines.
Evaluate cold-climate cultivar performance throughout the upper Midwest and Northeast
Performed with conjunction with the USDA NE-1020 coordinated variety trial, detailed data on weather and vine phenology, bud mortality, disease, and yield were collected across ND, SD, IA, CT, VT, NY, and MA. Fruit samples were collected from Frontenac, Frontenac gris, Marquette, La Crescent, and St. Croix at veraison and harvest and analyzed for fruit chemistry.
Evaluate cold-climate cultivar performance under a wide range of climates throughout the upper Midwest and Northeast. Performed with conjunction with the USDA NE-1020 coordinated variety trial, detailed data on weather and vine phenology, bud mortality, disease, and yield were collected across ND, SD, IA, CT, VT, NY, and MA. Fruit samples were collected from Frontenac, Frontenac gris, Marquette, La Crescent, and St. Croix at veraison and harvest and analyzed for fruit chemistry.
Combined analysis of NE-1020 variety trials in ND, SD, NE, IA, MI, NY, VT and CT. Tim Martinson
Resources
- Appellation Cornell #29. May 2017.Wallis, Anna and Tim Martinson. Wine Grapes for New York’s North Country: The Willsboro Cold Climate Variety Trial
- Introducing Itasca – Minnesota’s New Cold-Hardy White Wine Grape, by Matthew Clark, John Thull, and Jennifer Thull PDF of Clark and Thull Slides Link to Itasca paper
- Tales from the NE1020 Coordinated Variety Trials, by Tim Martinson and NGP team leaders PDF of Martinson slides Summary yield data (PDF)
February 2015. Research vineyard at the Cornell Willsboro Research Farm during dormant pruning. Photo by Anna Wallis. - Terroir and Typicity in Cold Hardy Wines, by Anna Katharine Mansfield PDF of slides
- How grape ripening follows growing degree days and Managing vineyards for high quality, Luke Haggerty and John Thull PDF of Haggerty’s slides PDF of Thull’s slides
- Emerging Cold Hardy Wine Grape Cultivars, by Mark Hart and Tom Plocher PDF of slides
- The Big Chill: Cold Acclimation and Recovery from Spring Frost in Grapes in New York, by Jason Londo and Tim Martinson PDF of Londo slides PDF of Martinson slides
- Developing Cold-Hardy Grapes: The Trials and Tribulations of Breeding Grapes for the Northern Continental U.S., by Matt Clark and Harlene Hatterman-Valenti PDF of slides
Characterize changes in fruit composition during the ripening phase and how they influence grape chemistry/quality at harvest.
Researchers characterized northern grape cultivars ripening from gene expression, to metabolites, to fruit and wine sensory characteristics. The goal was to understand ripening dynamics and use this information to develop novel maturity indices that guide cultural practices and harvest timing.
Phenolic compound profiles of cold climate wine grape cultivars.
SL Teh, J Luby, A Hegeman
Frontenac gris and Brianna berry ripening. Grapes were sampled and measured for fruit chemistry, aroma and flavor components, and associated gene expression in berry pulp and skins and wines of Frontenac gris and Brianna. Early results for Brianna indicated that it should be picked between 3.2 to 3.4 pH, and aromas in both varieties are more intense at lower pH.
Anne Fennell
Pre-fermentation skin contact temperatures and their impact on aroma compounds in white wines made from La Crescent grapes using aroma dilution analysis and simultaneous multidimensional gas chromatography – mass spectrometry – olfactometry. The goal of this study was to determine if pre-fermentation skin contact temperatures impacted aroma compounds in La Crescent wines.
Somchai Rice, Jacek Koziel, Jennie Savits, Murli Dharmadhikari
Determination of aroma compounds in red wines made from early and late harvest Frontenac and Marquette grapes using aroma dilution analysis and simultaneous multidimensional gas chromatography – mass spectrometry – olfactometry. This study determined which aromas are dominant in wines made from Frontenac and Marquette grapes harvested at 22 and 24 Brix.
Somchai Rice, Jacek Koziel, Anne Fennell
Resource
- From Vine to Glass: Understanding the Flavors and Aromas of Cold-Hardy Grapes and Wine, with Anne Fennell, Somchai Rice, and Adrian Hegeman. PDF of slides