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Abstract Detail

Crops and Wild Relatives

Migicovsky, Zoe [1], Cousins, Peter [2], Jordan, Lindsay [2], Myles, Sean [1], Striegler, Richard Keith [2], Verdegaal, Paul [3], Chitwood, Daniel H. [4].

Grapevine rootstocks affect growth-related scion phenotypes.

Grapes are one of the world's most valuable fruit crops and most grapevines are grafted, providing an excellent model for rootstock-scion interactions. 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 varieties grafted to 15 different rootstocks and determined the effect of rootstocks on eight traits important to viticulture. Data collected across five years determined that 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). Our study provides evidence that it is possible to achieve an over 50% increase in yield, pruning weight, and Ravaz index by choosing the optimal rootstock, indicating that initial rootstock choice is a crucial for grape growers looking to improve vine performance.

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Preprint associated with the presentation

1 - Dalhousie University
2 - E. & J. Gallo Winery
3 - University of California Cooperative Extension
4 - Michigan State University


Presentation Type: Oral Paper
Session: CW2, Crops and Wild Relatives II
Location: /
Date: Wednesday, July 21st, 2021
Time: 3:30 PM(EDT)
Number: CW2003
Abstract ID:621
Candidate for Awards:None

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