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Clone and Rootstock Interactions Influence the Cold Hardiness of Vitis vinifera cvs. Riesling and Sauvignon blanc

Andréanne Hébert-Haché, Debra Inglis, Belinda Kemp, James J. Willwerth
Am J Enol Vitic. December 2020 : ajev.2020.20025; published ahead of print December 29, 2020 ; DOI: 10.5344/ajev.2020.20025
Andréanne Hébert-Haché
1Department of Biological Sciences, Brock University, 1812 Sir Isaac Brock Way, Ontario, Canada, L2S 3A1; and
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Debra Inglis
1Department of Biological Sciences, Brock University, 1812 Sir Isaac Brock Way, Ontario, Canada, L2S 3A1; and
2Cool Climate Oenology and Viticulture Institute, Brock University, 1812 Sir Isaac Brock Way, Ontario, Canada, L2S 3A1.
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Belinda Kemp
2Cool Climate Oenology and Viticulture Institute, Brock University, 1812 Sir Isaac Brock Way, Ontario, Canada, L2S 3A1.
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James J. Willwerth
1Department of Biological Sciences, Brock University, 1812 Sir Isaac Brock Way, Ontario, Canada, L2S 3A1; and
2Cool Climate Oenology and Viticulture Institute, Brock University, 1812 Sir Isaac Brock Way, Ontario, Canada, L2S 3A1.
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  • For correspondence: jwillwerth@brocku.ca
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Abstract

Cold damage is a threat to grapegrowers worldwide. Cold hardiness varies across Vitis vinifera cultivars, but the influence of clone and rootstock selection on this trait is unclear. Five clone x rootstock combinations of Riesling (clone 49 x Riparia Gloire (RG); 49 x SO4 Teleki; clone 239 x RG; 239 x SO4; 239 x Couderc 3309) and four clones of Sauvignon blanc (clone 242, 297, 376, and 530 on SO4 Teleki rootstock) were evaluated over three dormant seasons (2016/17, 2017/18, and 2018/19). Bud cold hardiness was quantified every two to four weeks by differential thermal analysis (DTA) and reported as low temperature exotherms (LTE). Yield and pruning weights were recorded every year. Rootstock did not consistently influence the cold hardiness of Riesling buds, although clone 239 was generally hardier than clone 49. Significant clone*rootstock interactions were observed more frequently in the first year of the study. No consistent differences were observed between Sauvignon blanc clones, although clone 242 and 297 were often amongst the least hardy clones. Differences in hardiness were not consistently related to yield, pruning weight or crop load in the prior growing season. This study demonstrates the importance of both clone and rootstock selection in cool climate regions where freeze injury may occur. Future research should consider the clone identity and the possibility of a clone x rootstock interaction when comparing the cold hardiness of different cultivars.

  • clone
  • cold hardiness
  • cool climate
  • differential thermal analysis
  • rootstock
  • Vitis vinifera
  • Received April 2020.
  • Revision received September 2020.
  • Revision received October 2020.
  • Accepted November 2020.
  • © 2020 by the American Society for Enology and Viticulture.

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Clone and Rootstock Interactions Influence the Cold Hardiness of Vitis vinifera cvs. Riesling and Sauvignon blanc
Andréanne Hébert-Haché, Debra Inglis, Belinda Kemp, James J. Willwerth
Am J Enol Vitic.  December 2020  ajev.2020.20025;  published ahead of print December 29, 2020 ; DOI: 10.5344/ajev.2020.20025

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Clone and Rootstock Interactions Influence the Cold Hardiness of Vitis vinifera cvs. Riesling and Sauvignon blanc
Andréanne Hébert-Haché, Debra Inglis, Belinda Kemp, James J. Willwerth
Am J Enol Vitic.  December 2020  ajev.2020.20025;  published ahead of print December 29, 2020 ; DOI: 10.5344/ajev.2020.20025
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