terclim by ICS banner
IVES 9 IVES Conference Series 9 International Congress on Grapevine and Wine Sciences 9 2ICGWS-2023 9 Pre-breeding for developing heat stress resilient grape varieties to ensure yield 

Pre-breeding for developing heat stress resilient grape varieties to ensure yield 

Abstract

Climate change has numerous detrimental consequences and creates new challenges for viticulture around the world. Transitory or constant high temperatures frequently associated with an excess of sunlight (UV) can cause a variety of physiological disorders, such as sunburn. Diverse environmental factors and the plant’s response mechanisms to stress determine the symptoms. Grapevine berry sunburn leads to a drastic reduction in yield, and may eventually decline berry quality. Consequently, this poses a significant risk to the winegrowers. Therefore, the development of sunburn-resilient grape varieties is one of the imperative and effective strategies for sustainable viticulture in the future. The biodiversity of the genus Vitis provides a wide range of opportunities for developing sunburn-resilient grape varieties. In this perspective, the primary aim is to establish a laboratory-based phenotyping pipeline to monitor heat stress damage, thereby obviating the requirement for the ideal heat stress conditions in the field. Subsequently, using this tool we aim to determine the genomic area(s) responsible for heat stress resilience. The study utilizes a standard quantitative trait locus (QTL) mapping and genome-wide association studies strategy, followed by identifying and characterizing the genes. The findings of such genetic variation facilitate an improved understanding of the mechanisms underlying heat stress resilience. Additionally, molecular markers will eventually enable screening for heat stress resilience using marker-assisted selection (MAS) and extend options for early selection considerably. Thus, this opens up new strategies for the efficient breeding of novel grapevine varieties better adapted to climate change.

Acknowledgements: We gratefully appreciate the Interreg for funding the project KliWiReSSE

DOI:

Publication date: October 6, 2023

Issue: ICGWS 2023

Type: Poster

Authors

Malagol, Nagarjun; Herzog, Katja; Schwander, Florian; Töpfer, Reinhard; Trapp, Oliver

Julius Kühn-Institut, Institute for Grapevine Breeding Geilweilerhof, Siebeldingen, Germany

Contact the author*

Keywords

Vitis vinifera, heat stress, climate resilience, sunburn, QTL, MAS

Tags

2ICGWS | ICGWS | ICGWS 2023 | IVES Conference Series

Citation

Related articles…

The colour pattern of flower arrangements influence wine tasters’ sensory description

The arrangements of flowers and wine counterparts are inextricably linked. Whether a fundamental aspect of tablescaping or acolytes to broader entertainment rituals, they have an entangled history since ancient times. The aim of this contribution is to verify the influence of visually delicate and robust flower arrangements on individual description of wines. Changes in the sensory description of wines were investigated during subjects’ (thirty-two participants) exposure to three different conditions: the presence of delicate, robust, or totally absent flower arrangements.

Effect of ultraviolet B radiation on pathogenic molds of grapes

The fungicidal effect of UV-C radiation (100-280 nm wavelength) is well known, but its applicability for the control of pathogenic molds of grapes is conditioned by its effect on the host and by the risks inherent in its handling[1].
As an alternative, the effect in vitro of UV-B radiation (280-315 nm) on the main pathogenic molds of grapes has been studied: Botrytis cinerea, Aspergillus niger, Penicillium expansum and Rhizopus stolonifer.

Mycorrhizal symbiosis modulates flavonoid and amino acid profiles in grapes of Tempranillo and Cabernet Sauvignon 

Arbuscular mycorrhizal fungi (AMF) symbiosis is probably the most widespread beneficial interaction between plants and microorganisms. AMF has been widely reported to promote grapevine growth, water and nutrient uptake as well as both biotic and abiotic stress tolerance[1]. However, the impact of AMF on grape composition has been less studied. The aim of this work was to evaluate the effects of the association between two commercial grapevine cultivars (Tempranillo and Cabernet Sauvignon grafted onto 110 rootstock) and AMF on the anthocyanin, flavonol and amino acid concentrations and profiles of grapes.

Exploring relationships among grapevine chemical and physiological parameters and mycobiome composition under drought stress

Improving our knowledge on biotic and abiotic factors that influence the composition of the grapevine mycobiome is of great agricultural significance, due to potential effects on plant health, productivity, and wine characteristics. Among the various environmental factors affecting the morphological, physiological, biochemical and molecular attributes of grapevine, drought stress is one of the most severe, becoming increasingly an issue worldwide.

Sparkling wines and atypical aging: investigating the risk of refermentation

Sparkling wine (SW) production entails a two-steps process where grape must undergoes a primary fermentation to produce a base wine (BW) which is then refermented to become a SW. This process allows for the development of a new physicochemical profile characterized by the presence of foam and a different organoleptic profile.