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IVES 9 IVES Conference Series 9 GiESCO 9 Category: GiESCO 2023

Proceedings of GiESCO 2023

The 22nd GIESCO meeting is held by Cornell University in Ithaca, NY, July 17-21, 2023.

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GiESCO 2023IVES Conference SeriesSession 4: New disease tolerant varieties

How to deal with the Green Deal – Resistant grapevine varieties to reduce the use of pesticides in the EU

With its Farm-to-Fork Strategy, which is a part of the European Green Deal, the European Union aims at reducing the amount of pesticides used in agriculture by 50% until 2030. As viticulture uses around 70% of the fungicides in the EU, there is substantial pressure on winemakers to reduce their pesticide input. On top of the political goal, winegrowers face increased pressure from the public demanding a more sustainable production of wine.

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GiESCO 2023IVES Conference SeriesSession 4: New disease tolerant varieties

Breeding grapevines for disease and low temperature tolerance: the U.S. perspective

Most grape scion cultivars grown around the world are derived from a single species, Vitis vinifera. Yet, the proportion of interspecific hybrids is increasing for a variety of reasons, including resistance to abiotic stresses such as low temperatures; societal, economic and environmental pressures to reduce pesticide usage; and to add a greater range of flavors to new table grape cultivars.

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GiESCO 2023iAVW session: The GiESCO ecometaethical charterIVES Conference Series

Try the GiESCO EcoMetaEthical Charter !

The sustainability of vineyards is a major issue. The choices proposed to date have major flaws such as the lack of scientific bases or the use of dangerous products such as copper. GiESCO has published a charter of best practices for the environment and for people adapted to various environments. The use of sustainably resistant grape varieties that produce quality wines plays a central role here. Often innovative cultivation systems associated with new technologies and based on scientific bases, guarantee respect for people and the environment. These proposals are brought together in a charter which is part of a meta-ethical approach to seeking consensual measures to ensure the sustainability of vineyards.

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GiESCO 2023IVES Conference SeriesSessions 1, 2 and 3: Adaptation to climate change

Clustering wine aromatic composition of Vitis vinifera grapevine varieties

Climate change is likely to impact wine typicity across the globe, raising concerns in wine regions historically renowned for the quality of their terroir. Amongst several changes in viticultural practices, replacing some of the planting material (i.e clones, rootstocks and cultivars) is thought to be one of the most promising potential levers to be used for adapting to climate change. But the change of cultivars also involves the issue of protecting the region’s wine typicity.

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GiESCO 2023IVES Conference SeriesSessions 1, 2 and 3: Adaptation to climate change

Exploring the mechanisms of grapevine single berry development and ripening

The strategy of single berry phenotyping is a recently rediscovered research tool that has gained great attention. The latest studies have indicated that previous physiological models based on pooling asynchronous populations of berries provided biased or blurred information on berry development key players. The possibility of monitoring and sampling single synchronized berries to study their development sequentially has opened new lines of research aimed at unraveling the genes that regulate grapevine fruit development. This study aimed to decipher the gene pathways responsible for the activation/deactivation of physiological processes involved in the green phase of growth, the onset of ripening, and the second growth phase.

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GiESCO 2023IVES Conference SeriesSessions 1, 2 and 3: Adaptation to climate change

First insights on the intra-species diversity in V. berlandieri: environmental adaptation and agronomic performances when used as rootstock

In grafted plants, such as grapevine, increasing the diversity of rootstocks available to growers is an ideal strategy to get adaptation to climate change. The rootstocks used for grapevine are hybrids of various American Vitis, including V. berlandieri. The rootstocks currently used in vineyards are derived from breeding programs involving very small numbers of parental individuals.

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GiESCO 2023IVES Conference SeriesSessions 1, 2 and 3: Adaptation to climate change

Viticultural parameters and enological performance of six Merlot clones in two contrasting vintages

Vitis vinifera L. and other Vitis have high genetic variations for cultivars or varieties. Many countries carried out strong efforts creating new clones of varieties, mainly focusing on plants free of viruses and other grapevine diseases, but also on different agronomical and enological characteristics of the plants. The aim of this study was to evaluate six clones of Merlot in the traditional viticulture of southeastern Brazil, focusing on distinct characteristics of yield, enological potential of grapes and wine typicality, in order to improve wine quality.

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GiESCO 2023IVES Conference SeriesSessions 1, 2 and 3: Adaptation to climate change

Identifying best parameters to characterize genotypes capability of retaining adequate malic acid at harvest and in final wines

Under current climate change pressures, obtaining grapes with adequate acidity at harvest is one of the main challenges for growers, especially if the goal is producing sparkling wines. This issue arises from two main occurrences: i) higher temperatures enhance degradation of malic acid; ii) grape maturity may occur under suboptimal climatic conditions due to an advanced phenology.

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GiESCOIVES Conference SeriesSessions 1, 2 and 3: Adaptation to climate change

Intravarietal diversity: an opportunity for climate change adaptation

Merlot grapevine is the second wine cultivar most planted in the world and especially in the Bordeaux wine region. This cultivar has many advantages in producing high quality wine; however, in the last decade, climate change has increased the sugar concentration in berries at harvest and shortened the maturation cycle. If this has been up to now a great opportunity to improve wine quality profile, we are touching the tipping point. High sugar concentration at harvest induces high alcool content in wine which can negatively impact wine quality. There are many viticultural and oenological practices possible to limit this effect. In this study we focus on plant material through intra-varietal diversity of Merlot cultivar.

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GiESCO 2023IVES Conference SeriesSessions 1, 2 and 3: Adaptation to climate change

Drought tolerance of varieties in semi-arid areas: can the behavior of Tempranillo be improved by varieties of its own lineage?

Tempranillo is the most widely grown red grapevine variety in Spain, currently representing 42% of the total number of red varieties and 21% of the total vineyard area. Due to the economic importance that this variety represents in Spanish viticulture, in some areas where it is traditionally grown, there is a special concern about the viability of the future growing of this variety is being compromised by the climate change effects.

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