terclim by ICS banner
IVES 9 IVES Conference Series 9 Fruit set rate clonal variation explains yield differences at harvest in Malbec

Fruit set rate clonal variation explains yield differences at harvest in Malbec

Abstract

Malbec is Argentina’s flagship variety, and it is internationally recognized for producing high-quality red wines. Fruit set rate is a major component in grapevine yield determination, and it is the outcome of multiple genetic and environmental interacting variables. Here, we characterized the reproductive performance of 25 Malbec clones grown under homogeneous conditions in a 23-years old experimental plot. We measured traits near flowering (like the number of flowers per inflorescence) and at harvest (including the number of berries per cluster and berry weight), during two consecutive seasons (2022 and 2023). After combining image-based systems to assist in the phenotyping with univariate and multivariate approaches for statistical analyses, we identified a wide range of clonal variation. For example, fruit set rate varied from 13.1 to 65.8% (avg. 38.4%) and from 9.8 to 50.0% (avg. 32.1%) in 2022 and 2023, respectively. A hierarchical clustering on principal components analysis identified three clonal groups of phenotypic similarity, consistent between seasons. Interestingly, two of these groups presented a similar number of flowers per inflorescence but markedly different fruit set rates. Consequently, clones from these two groups produced a significantly different number of berries per cluster. The in-depth analysis of clones assigned to these contrasting groups, for traits like pollen viability and flower morphology, allowed exploring the potential causes of the observed differences. We found that fruit set rate variation has multiple causes in Malbec, associated to anomalous flower development and functionality, which could ultimately impact on clonal yield differences at harvest.

Download the abstract

DOI:

Publication date: June 13, 2024

Issue: Open GPB 2024

Type: Poster

Authors

Luciano Calderón1*, Javier Tello2*, Silvina van Houten1, Claudio Muñoz1,4, Tomas Oroño1, Laura Bree3, Daniel Bergamin3, Cristóbal Sola3, Natalia Carrillo4, José Miguel Martinez-Zapater2, Diego Lijavetzky1

1 Instituto de Biología Agrícola de Mendoza (CONICET-UNCuyo). Mendoza, Argentina
2 Instituto de las Ciencias de la Vid y del Vino (ICVV; CSIC, UR, Gobierno de La Rioja). Logroño, Spain
3 Vivero Mercier Argentina. Mendoza, Argentina
4 Facultad de Ciencias Agrarias (UNCuyo). Mendoza, Argentina

Contact the author*


Keywords

intra-varietal variation, reproductive performance, image-assisted phenotyping, flower development

Tags

IVES Conference Series | Open GPB | Open GPB 2024

Citation

Related articles…

The challenge of viticultural landscapes

Le monde vitivinicole est de plus en plus concerné par la question paysagère : l’enjeu est de taille puisqu’il s’agit de la survie de l’image positive dont bénéficient les Appellations d’Origine Contrôlée. Les paysages sont composés d’éléments qui renvoient à des références socioculturelles fortes, susceptibles de modeler l’image d’un produit et d’en déterminer à notoriété et le prix. Dans un monde médiatisé comme le nôtre, le visuel construit l’arrière-plan des représentations mentales associées à toute marchandise ; et pour les aliments, produits de la terre, ce visuel est forcément paysager.

Read More

Prevention of wine oxidation during barrel aging: an innovative method to measure antioxidant

Wine oxidation is a problem that affects the freshness, the aromatic profile, the colour and also the mouthfeel of the wine. It mainly concerns white wines. Oxygen interactions with wine compounds lead to the phenomena cited above that are responsible for the depreciation of these wines. Barrel aging is a crucial step in the wine process because it allows many modifications as wine enrichment, colour stabilization, clarification and also a slow oxygenation of the wine. Effects of the oak barrel have to be known to prevent oxidation of the wine. We have been interested in the main antioxidant compounds released by oak barrels to the wine and we have developed an innovative method to reach directly these antioxidant compounds at the oak stave surface.

Read More

TARTARIC STABILIZATION MAY AFFECT THE COLOR AND POLYPHENOLIC COMPOSITION OF TANNAT RED WINES FROM URUGUAY

Tartrate precipitation affects the properties of wines, due to the formation of crystals that cause turbidity, even after being bottled. The forced tartaric stabilization is carried out frequently for young wines, through various physicochemical procedures. The traditional treatment for tartaric stabilization is refrigeration, but it can have a negative effect on wine’s sensory properties, and particularly on the color of red wines. The aim of this study was to evaluate the effect of different tartaric stabilization options on the color and phenolic composition of Tannat red wines from Uruguay.

Read More

Influence of Potential Alcohol and pH Adjustment on Polyphenols and Sensory Characteristics of Red Wines Produced at Different Harvest Time Points

Wine quality is influenced by grape maturity, typically monitored by measuring sugar content and acidity.

Read More

Hyperspectral imaging for the appraisal of varietal aroma composition along maturation in intact Vitis vinifera L. Tempranillo Blanco berries

The knowledge of the grape aromatic composition during ripening provides very important information for winegrowers, who may carry out different viticultural practices, or determine the harvest date more accurately. However, there are currently no tools that allow this measurement to be carried out in a non-invasive and rapid way. For this reason, the aim of this work was to design a non-invasive methodology, based on hyperspectral imaging to estimate the aromatic composition and total soluble solids (TSS) of Tempranillo Blanco berries during ripening.

Read More