 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

Reconnaissance des vins de terroir par les consommateurs

Approaching the notion of terroir wines at the level of consumption poses a problem due to the absence of a regulatory definition of the term terroir, which is not taken up either at Community level or at national level (the Consumer Code in particular does not define not the land). However, whatever definition is adopted for the terroir, we can retain at the consumer level an identification of the terroir through the different geographical mentions appearing on the labels or on the shelves of the wine shelf.

Vineyard’s ozone application to induce secondary metabolites accumulation in grapes and wine

In viticulture sector to find new tools for pest management has become an urgent necessity. Hence, grapevines cultivation has high production rate demand and to meet the intensive market request, a massive use of pesticides is often required. In addition to the environmental problems associated with large use of chemicals, there is an increasing number of consumers which are asking for

Settling precocity and growth kinetics of the primary leaf area: two indicative parameters of grapevine behaviour

Le comportement de la vigne en terme de fonctionnement thermique et hydrique, influe de manière directe sur la qualité des baies de raisin. L’effet du terroir peut être perçu à travers l’étude de paramètres tels que la précocité, la mise en place de la surface foliaire ou la vigueur. Une expérimentation a été conduite en Val de Loire sur le cépage chenin dans le but de mieux comprendre le rôle des variables liées au terroir sur la croissance et le développement de la vigne et in fine sur la qualité des baies.

Impact of oenological tannins on microvinifications affected by downy mildew

AIM: Vine diseases are still responsible for economic losses. Previous study in our laboratory, have shown effects of oenological tannins against Botrytis cinerea1,2. According to this, the aim was to evaluate the wine protection by oenological tannins against an another disease, the downy mildew. METHODS: During the 2020 vintage, infected grapes by downy mildew (Vitis vinifera cv. Merlot) were collected from the dispositive ResIntBio. The 100 kg were crushed, destemmed and dispatch into 10 aluminium tanks. SO2 was added at 3 g/hL. Oenological tannins (grape, quebracho, ellagitannin or gallotannin) were added at 100 g/hL into eight different tanks (4×2 tanks). The two last tanks were considered as control without addition of oenological tannins. Alcoholic fermentation was achieved with Actiflore 33® at 20 g/hL. Malolactic fermentation was achieved with Lactoenos B7at 1 g/hL. Finished wines were sulfited to obtain 45 mg/L of total SO2.

How do we describe wine imagery? Expertise shapes language usage and multimodal imagery for wine

The acquisition of wine expertise is a multi-faceted and multisensory process with implications for sensory perception, attention, memory, and language production. With the prevalence of the predictive model of brain functioning, one area of burgeoning research interest involves wine mental imagery, since the brain relies on imagined experiences to build predictions for the future. Recent evidence has shown that, for instance, those with higher imagery vividness are more susceptible to wine advertising. However, little is known about the association between mental imagery and other associated cognitive processes, such as the ability to produce words that describe such imagery.