terclim by ICS banner
IVES 9 IVES Conference Series 9 Genetic determinism of grapevine development stages as a tool for the adaptation to climate change

Genetic determinism of grapevine development stages as a tool for the adaptation to climate change

Abstract

A major goal of modern grapevine (Vitis vinifera L.) breeding programs is the introgression of resistance genes along with desirable traits for better adaptation to climate change. Developmental stages have an impact on yield components and berry composition and are expected to shift towards earlier dates in the future. We investigated the genetic determinism of phenological stages in the progeny of a cross between two grapevine hybrids, each carrying several quantitative trait loci (QTL) for downy mildew and powdery mildew resistance. The dates of three phenological stages, budbreak, flowering and veraison, were recorded during three consecutive seasons for 209 genotypes in the vineyard. The phenotypic data analysed were the duration of three periods expressed in thermal time (degree-days): 15 February to budbreak, budbreak to flowering and flowering to veraison. High density parental and consensus genetic maps were constructed and used for QTL detection. Several QTL were detected for each period and the corresponding allelic effects were quantified and expressed in degree.days. Two virtual early and late genotypes were created by combining the relevant alleles. Using a previously validated ecophysiological model with simulated climate data for the RCP8.5 IPCC scenario, budbreak, flowering and veraison dates were predicted for the parents, Chardonnay, and the two virtual genotypes for each year up to 2100. Mean temperatures during the ripening period were calculated. The interest of the virtual genotypes in compensating for the expected shift in veraison dates will be discussed.

Download the abstract

DOI:

Publication date: June 13, 2024

Issue: Open GPB 2024

Type: Poster

Authors

Elsa Chedid1, Vincent  Dumas1, Didier Merdinoglu1, Éric Duchêne1*

1 Affliliation SVQV, Université de Strasbourg, INRAE, Colmar, France

Contact the author*

Keywords

Grapevine, climate change, phenology, QTL, plant breeding

Tags

IVES Conference Series | Open GPB | Open GPB 2024

Citation

Related articles…

Grapevine rootstock field evaluation under drought and saline condition in California

Climate change impacts grape production worldwide and in California drought and salinity became increasingly challenging for grape growers to maintain sustainable production and fruit quality.

Read More

VOLATILE AND GLYCOSYLATED MARKERS OF SMOKE IMPACT: EVOLUTION IN BOTTLED WINE

Smoke impact in wines is caused by a wide range of volatile phenols found in wildfire smoke. These compounds are absorbed and accumulate in berries, where they may also become glycosylated. Both volatile and glycosylated forms eventually end up in wine where they can cause off-flavors. The impact on wine aroma is mainly attributed to volatile phenols, while in-mouth hydrolysis of glycosylated forms may be responsible for long-lasting “ashy” aftertastes (1).

Read More

Successful technology transfer of the early defoliation technique in cv. Mandó, an autochthon variety from south-east Spain

In the old-world viticulture autochthonous varieties are an important inheritance because they can provide wines with authenticity and distinction. Cultivar Mandó is an almost extinguished variety from the south-east

Read More

Physiological means to curb the enthusiasm of viruses from infecting grapevines  

The two most deadly viruses infecting and threatening the productivity of grapevines worldwide are leafroll and red blotch viruses. There is no cure for viral diseases other than roguing the symptomatic vines and replacing them with certified vines derived from clean, virus-tested stocks.
Given that phloem plays a central role in virus infection, this study aimed to purge the virus by girdling the phloem of leafroll-infected vines at different phenological stages of infected grapevines. Phloem-girdling was performed on canes at veraison to varying regions between the proximal and distal clusters.

Read More

Multi-mineral wine profiling and Artificial Intelligence: Implementing the signatures of each wine to train algorithms to meet the new challenges facing the wine industry

Multi-mineral wine profiling and artificial intelligence: implementing the signatures of each wine to train algorithms to meet the new challenges facing the wine industry. Although their quantity is minimal, minerals are essential elements in the composition of every wine. Their presence is the result of complex interactions between factors such as soil, vines, climate, topography, and viticultural practices, all influenced by the terroir. Each stage of the winemaking process also contributes to shaping the unique mineral and taste profile of each wine, giving each cuvée its distinctive characteristics.

Read More