 IVES 9 IVES Conference Series 9 Macrowine 9 Macrowine 2021 9 Grapevine diversity and viticultural practices for sustainable grape growing 9 Grape texture characteristics are linked to one major qtl

Grape texture characteristics are linked to one major qtl

Abstract

AIM: Berry texture and berry skin mechanical properties have high agronomic importance, related to quality and marketing requirements of wine, table and raisin grapes. Despite the efforts already made to detect molecular markers and candidate genes associated with berry texture, different QTLs were proposed until now, showing low contribution rates to the trait, likely due to difficulty in phenotyping. Searching for QTLs linked to berry texture, an F1 population of 154 individuals and their parents (‘Raboso Veronese’ and ‘Sultanina’) were used in this study.

METHODS: Density sorting by flotation was applied to reduce sample variability. One density class was selected achieving berries with a similar ripening stage. Mechanical properties were measured and normalized on berry diameter, surface, and volume. Hundred and ninety SSR molecular markers were used to produce a genetic map using JoinMap. MapQTL was applied searching for QTLs associated with berry texture traits. VviAGL11 expression profiling and co-expression analysis during grape ripening was evaluated using available transcriptomic datasets.

RESULTS: A major QTL was found on LG 18, with high LOD scores (from 25.07 to 31.92) and high phenotypic variance explained (from 53.2 to 63.5%) for all measured texture traits. Surprisingly, this major QTL showed association with SSR markers linked to VviAGL11, the main gene leading to stenospermocarpy. Data available on VviAGL11 expression and co-expression profiling during grape ripening strongly suggested that this gene may act on the traits of a ripe berry through the activation of some target genes involved in lipid and hormone metabolism, transport and in gene expression regulation.

CONCLUSIONS

Previous studies showed how difficult is determining the genetic control of berry texture. Our results clearly underline the major role played by a QTL located on LG18 and characterized by the presence of the well-known MADS-box gene VviAGL11.

DOI:

Publication date: September 2, 2021

Issue: Macrowine 2021

Type: Article

Authors

Manna Crespan

CREA Research Centre of Viticulture and Enology, Conegliano, Italy,Daniele Migliaro, CREA Research Centre of Viticulture and Enology, Conegliano, Italy Silvia Vezzulli, Fondazione Edmund Mach, S. Michele a/Adige, Trento, Italy Sara Zenoni, University of Verona, Italy Giovanni Battista Tornielli, University of Verona, Italy Simone Giacosa, University of Torino, Italy Maria Alessandra Paissoni, University of Torino, Italy Susana Río Segade, University of Torino, Italy Luca Rolle, University of Torino, Italy

Contact the author

Keywords

Vitis vinifera L., fruit quality, flotation, lg18, vviagl11, mads box genes

Citation

Molecular binding mechanisms between grape seed polypeptides and wine anthocyanins by fluorescence spectroscopy and computational techniques

In recent years, proteins endogenous to grape have become of great interest to the wine industry because they represent a new alternative to other biopolymers subjected to more legal restrictions (i.e. animal origin and synthetics) that can be used in technological applications to modulate sensory attributes such as wine color and have a positive impact on wine quality.

Terroir et marché : exemples de stratégie pour les vins d’une petite région (Muscadet – Anjou – Touraine)

The designations of origin of the Loire Valley wine have been recognized according to customs and notoriety established over the centuries since the Middle Ages. There are four main production basins going up the Loire, from Nantes to the Sancerrois region: Nantes, Anjou-Saumur, Touraine and the vineyards of the Centre. In each of these basins, there is a wide range of appellations of origin which has been established according to a logic which may not seem obvious to the uninformed.

Comportement hydrique des sols viticoles et leur influence sur le terroir

L’étude des relations Terroir – Vigne – Raisin est complexe. La recherche et le développement des facteurs qualitatifs qui influencent le caractère des vins sont multiples. Divers travaux mettent en évidence la relation entre l’alimentation en eau de la plante, son développement végétatif et les caractéristiques de ses raisins.

Effects of different crop load and pruning aplications on vi̇ne growing, grape yi̇eld and quality parameters of early sweet (Vitis vinifera L.) grape variety

It is important to examine the yield quality elements of table grape varieties. There are great differences in winter and summer pruning of the early sweet grape variety. For this reason, in the study, the effects of different crop loads and pruning processes on grape yield, quality characteristics and vine development in the early sweet (vitis vinifera L.) Grape variety were investigated.

Les motivations du vigneron en quête de l’expression “terroir”

During the 1985 harvest, I was able to notice in the taste perception a break in the harmony of the wine during even partial blends of grapes from different plots. At the same time, I noted a good reaction from customers for greater product customization. As a result, I was led to seek the objective limits of the terroir of a cuvée and by a constant and permanent refinement of the parameters specific to each of the terroirs.