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IVES 9 IVES Conference Series 9 International Congress on Grapevine and Wine Sciences 9 2ICGWS-2023 9 Retrospective analysis of our knowledge regarding the genetics of relevant traits for rootstock breeding 

Retrospective analysis of our knowledge regarding the genetics of relevant traits for rootstock breeding 

Abstract

Rootstocks were the first sustainable and environmentally friendly strategy to cope with a major threat for Vitis vinifera cultivation. In addition to providing Phylloxera resistance, they play an important role in protecting against other soil-borne pests, such as nematodes, and in adapting V. vinifera to limiting abiotic conditions. Today viticulture has to adapt to ongoing climate change whilst simultaneously reducing its environmental impact. In this context, rootstocks are a central element in the development of agro-ecological practices that increase adaptive potential with low external inputs. Despite the apparent diversity of the Vitis genus, only few rootstock varieties are used worldwide and most of them have a very narrow genetic background. This means that there is considerable scope to breed new, improved rootstocks to adapt viticulture for the future.

However, in comparison to the extensive research effort devoted to fruit varieties, there is little scientific knowledge to support grapevine rootstock breeding. Since grafting became widespread in viticulture, very few studies have been done on the genetic architecture of the relevant traits in rootstocks, even for resistance to Phylloxera or grafting ability. The current presentation will provide an overview of our knowledge on the genetics of specific rootstock traits, covering resistance to Phylloxera and nematodes, rooting and grafting abilities, and adaptation to drought and salinity. An attempt to list the resources and initiatives at the international level will be made.   

Acknowledgements: The research for rootstock breeding in Bordeaux has been supported over the years by numerous funding agencies and has benefited from the support of the wine industry. Louis Bordenave, Bernard Douens, Jean-Pierre Petit, Cyril Hévin and Nicolas Hocquard are to be acknowledged for their great involvement in the management of genetic resources  and the monitoring of plant material.

DOI:

Publication date: October 19, 2023

Issue: ICGWS 2023

Type: Article

Authors

Nathalie Ollat1, Jean-Pascal Tandonnet1, Marina de Miguel, Clément Saint-Cast1, Virginie Lauvergeat1, Joseph Tran1, Bernadette Rubio1, Nabil Girollet1, Pierre-François Bert1, Maria Lafargue1, Philippe Vivin1, Sarah J. Cookson1, Daniel Esmenjaud2, Elisa Marguerit1

1 EGFV, Univ. Bordeaux, Bordeaux Sciences Agro, INRAE, ISVV, 33882 Villenave d’Ornon, France
2 INRAE, Université Côte d’Azur, CNRS, ISA, 06903 Sophia Antipolis, France

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Keywords

diversity, biotic stress, abiotic stress, roots, genes, resistance

Tags

2ICGWS | ICGWS | ICGWS 2023 | IVES Conference Series

Citation

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