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Grapevine rootstocks affect growth-related scion phenotypes

View ORCID ProfileZoë Migicovsky, Peter Cousins, Lindsay M. Jordan, Sean Myles, Richard Keith Striegler, Paul Verdegaal, Daniel H. Chitwood
doi: https://doi.org/10.1101/864850
Zoë Migicovsky
1Department of Plant, Food and Environmental Sciences, Faculty of Agriculture, Dalhousie University, Truro, NS B2N 5E3, Canada
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  • ORCID record for Zoë Migicovsky
  • For correspondence: zoe.migicovsky@dal.ca dhchitwood@gmail.com
Peter Cousins
2E. & J. Gallo Winery, Modesto, CA, 95354, USA
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Lindsay M. Jordan
3E. & J. Gallo Winery, Acampo, CA 95220, USA
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Sean Myles
1Department of Plant, Food and Environmental Sciences, Faculty of Agriculture, Dalhousie University, Truro, NS B2N 5E3, Canada
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Richard Keith Striegler
3E. & J. Gallo Winery, Acampo, CA 95220, USA
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Paul Verdegaal
4University of California Cooperative Extension, San Joaquin Valley, Stockton, CA, 95206, USA
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Daniel H. Chitwood
5Department of Horticulture, Michigan State University, East Lansing, Michigan, 48824, USA
6Department of Computational Mathematics, Science and Engineering, Michigan State University, East Lansing, Michigan, 48824, USA
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  • For correspondence: zoe.migicovsky@dal.ca dhchitwood@gmail.com
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Abstract

Grape growers use rootstocks to provide protection against pests and pathogens and to modulate viticulture performance such as shoot growth. Our study examined two grapevine scion varieties (‘Chardonnay’ and ‘Cabernet Sauvignon’) grafted to 15 different rootstocks and determined the effect of rootstocks on eight traits important to viticulture. We assessed the vines across five years and identified both year and variety as contributing strongly to trait variation. The effect of rootstock was relatively consistent across years and varieties, explaining between 8.99% and 9.78% of the variation in growth-related traits including yield, pruning weight, berry weight, and Ravaz index (yield to pruning weight ratio). Increases in yield due to rootstock were generally the result of increases in berry weight, likely due to increased water uptake by vines grafted to a particular rootstock. We demonstrated a greater than 50% increase in yield, pruning weight, or Ravaz index by choosing the optimal rootstock, indicating that rootstock choice is crucial for grape growers looking to improve vine performance.

Competing Interest Statement

PC, LMJ, and RKS were employed by E. & J. Gallo Winery. The remaining authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.

Copyright 
The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under a CC-BY-NC-ND 4.0 International license.
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Posted February 22, 2021.
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Grapevine rootstocks affect growth-related scion phenotypes
Zoë Migicovsky, Peter Cousins, Lindsay M. Jordan, Sean Myles, Richard Keith Striegler, Paul Verdegaal, Daniel H. Chitwood
bioRxiv 864850; doi: https://doi.org/10.1101/864850
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Grapevine rootstocks affect growth-related scion phenotypes
Zoë Migicovsky, Peter Cousins, Lindsay M. Jordan, Sean Myles, Richard Keith Striegler, Paul Verdegaal, Daniel H. Chitwood
bioRxiv 864850; doi: https://doi.org/10.1101/864850

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