terclim by ICS banner
IVES 9 IVES Conference Series 9 Functional characterisation of genetic elements regulating bunch morphology in grapevine

Functional characterisation of genetic elements regulating bunch morphology in grapevine

Abstract

Vitis vinifera L., is considered one of the world’s most important cultivated fruit crops. In agriculture, bunch morphology is a grapevine-specific trait, which directly impacts fruit quality and health.
Bunch size, shape, and compactness are major aspects of bunch morphology, with the degree of compactness emerging as an important trait for grapevine genetic enhancement and vineyard management. The importance of this trait stems from its impact on disease susceptibility, berry ripening, and other grape quality properties. However, current knowledge of the genes controlling it remains limited.
This study aims to identify and characterise genetic elements regulating grapevine bunch formation, while also providing valuable understanding of molecular and cellular regulation of this important process. This will be done by carrying out three planned objectives, summarised as: identification of candidate genes, overexpression of candidates in model plants, and genetically engineering grapevine for selected genes.
Ten candidate genes were identified based on their presence in loci associated with bunch architecture traits, expression patterns during flower development, and sequence homology with genes regulating plant architecture in other species. These genes were cloned into plant expression vectors that were used to transform tomato and Arabidopsis thaliana plants. The research anticipates observing phenotypic evidence in the transformed model plants, which may suggest a potential role in grapevine bunch architecture regulation. The identification and characterisation of genes controlling bunch morphology offer promising avenues for advancing grapevine breeding and cultivation practices, benefiting the viticulture industry and consumers alike, by improving growth, health, and fruit production.

Download the abstract

DOI:

Publication date: June 13, 2024

Issue: Open GPB 2024

Type: Poster

Authors

Kerry-Ann Jordaan1*, Manuela Campa1, Luca Nerva2, Johan Burger1, Justin Lashbrooke1

1Department of Genetics, Stellenbosch University, P/Bag X1, Matieland, 7602, South Africa
2Research Centre for Viticulture and Oenology, Council for Agricultural Research and Economics (CREA-VE), Via XXVIII Aprile, 31015 Conegliano (TV), Italy

Contact the author*

Keywords

bunch morphology, overexpression, grapevine, compactness, transformation

Tags

IVES Conference Series | Open GPB | Open GPB 2024

Citation

Related articles…

La protection des terroirs viticoles dans l’AOC Côtes du Rhône (France)

[English version below]

Les terroirs viticoles, et plus particulièrement ceux des vignobles AOC, sont aujourd’hui menacés par de multiples agressions. Ces territoires sont non seulement l’outil de production

Read More

Impact of mycorrhizal inoculation of ‘Monastrell’ grapevines grafted onto different conventional vs. newly breed rootstocks 

Grafting Vitis vinifera L. (wine traditional cultivars) onto North American grapevine species or hybrids is a common practice in viticulture given their tolerance against phylloxera (Daktulosphaira vitifoliae). However, rootstock genetic background affects the response of grapevines to environmental stresses and their ability for establishing a symbiotic relationship with the microbial communities, and more specifically with arbuscular mycorrhizal fungi (AMF).
The aim of this study was to evaluate Monastrell variety (clone ENTAV 369) grafted onto three rootstocks (140Ru, 110R and RG8) characterized by a different genetic background, in combination with AMF inoculation (Rhizophagus irregularis) vs. a non-inoculated control with regards to vegetative growth, leaf gas exchange parameters, and mycorrhization.

Read More

Grape seed powder as an alternative to bentonite for wine fining

PR proteins can cause haze in wines, and the risk is to keep the wine unsold. Generally, in winemaking bentonite solves this problem by removing proteins, but it is not a renewable resource, has poor settling, which means difficulty in filtering after use and a considerable loss of wine, it is not a specific adsorbent and may reduce aromas and flavor compounds

Read More

Improvement of the red wine AOC Grignolino d’Asti typicality using some technological innovations

L’AOC Grignolino d’Asti (20000 hl environ de production) est un vin de la province de Asti, produit avec le raisin rouge du cépage de même nom originaire du Piémont (Nord-Ouest d’Italie).

Read More

Comparison of aroma-related compounds of carbonic maceration and traditional young red winemaking in case of Merlot by means of targeted metabolomic approach

Winemaking decisions and techniques are known to affect the final aromatic composition of red wines. Winemakers put a constant effort into the improved controlling of vinification procedures to achieve better quality. Anyway an increased customer’s demand for uniqueness is often forcing them to adjust and offer new and new interesting products. To support the producers, an improved knowledge on aromatic potential as affected by classical and alternative strategies is needed.

Read More