terclim by ICS banner
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

Contact the author*

Keywords

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

Tags

2ICGWS | ICGWS | ICGWS 2023 | IVES Conference Series

Citation

Related articles…

REGAVID a decision tool to deficit irrigation in a temperate climate (DO Monterrei – Spain)

In temperate climates, such as in the North of Spain, the use of irrigation in the vineyard has not been required, due to the usual rainfall from June to August. In some large vineyards, irrigation management has been carried out, based on occasional support irrigation, or for the application of nutrients (fertigation). Currently it is necessary to implement decision support models to manage irrigation water in real time and avoid misuse of a scarce resource. Moreover, quality standards must be achieved, as in the previous rainfed viticulture.

The surprising role of VvLYK6 in grapevine immune responses triggered by chitin oligomers

For sustainable viticulture, the substitution of chemical inputs with biocontrol products has become one of the most considered strategies. This strategy is based on elicitor-triggered immunity that requires a deep understanding of the molecular mechanisms involved in plant defense activation. Plant immune responses are triggered through the perception of conserved microbe-associated molecular patterns (MAMPs) which are recognized by pattern recognition receptors (PRRs) at the plasma membrane.

Selecting green cover species in the under-trellis zone of Lower Austrian vineyards

The under-trellis zone of vineyards is a sensitive area through which vines cover a significant portion of their nutrient and water needs. Mechanical and chemical methods are applied to suppress competing and tall-growing weeds to ensure optimal vine growth conditions. In addition to higher operating costs and depending on the soil conditions, these practices might lead to a long-term reduction in soil fertility and biodiversity. The presented study aims to analyse the suitability and interspecies competition of a selected green cover mixture of five local herbaceous species as potential green cover mixture in the under-trellis area of Lower Austrian vineyards.

Molecularly imprinted polymers: an innovative strategy for harvesting polyphenoles from grape seed extracts

Multiple sclerosis (MS) is a multifactorial autoimmune disease associating demyelination and axonal degeneration developing in young adults and affecting 2–3 million people worldwide. Plant polyphenols endowed with many therapeutic benefits associated with anti-inflammatory and antioxidant properties represent highly interesting new potential therapeutic strategies. We recently showed the safety and high efficiency of grape seed extract (GSE), a complex mixture of polyphenolics compounds comprising notably flavonoids and proanthocyanidins, in an experimental autoimmune encephalomyelitis (EAE) mouse model of MS.

Control of bacterial growth in carbonic maceration winemaking through yeast inoculation

Controlling the development of the bacterial population during the winemaking process is essential for obtaining correct wines[1]. Carbonic Maceration (CM) wines are recognised as high-quality young wines. However, due to its particularities, CM winemaking implies a higher risk of bacterial growth: lower SO2 levels, enrichment of the must in nutrients, oxygen trapped between the clusters… Therefore, wines produced by CM have slightly higher volatile acidity values than those produced by the destemming/crushing method[2].