terclim by ICS banner
IVES 9 IVES Conference Series 9 Molecular characterization of a variegated grapevine mutant cv Bruce’s Sport

Molecular characterization of a variegated grapevine mutant cv Bruce’s Sport

Abstract

Variegation, a frequently observed trait in plants, is characterized by the occurrence of white or discoloured plant tissue. This phenomenon is attributed to genetic mosaicism or chimerism, potentially impacting the epidermal (L1) and subepidermal (L2) cell layers. In grapevine, variegation manifests as white or paler leaf, flower, or berry tissues, often leading to stunted growth and impeded development. Despite its prevalence, variegation in grapevines remains understudied. Notably, a natural mutant derived from Sultana, namely Bruce’s Sport, exhibits colour variegation in the leaves, although this occurrence only appears later in the growing season. Conversely, the flowers and berries are always variegated and are paler in colour. Furthermore, studies have observed that Bruce’s Sport displays a lower berry yield compared to the Sultana variety, along with reduced polyphenol oxidase (PPO) activity in the variegated tissues. This study aims to investigate the genetic basis of variegation in Bruce’s Sport and its effects on plant growth and development. To this extent, a transcriptomic analysis was employed comparing data obtained from flower tissue of Sultana and Bruce’s Sport. Additionally, differentially expressed genes were confirmed, aiding in the identification and characterization of genes associated with variegation in the Vitis genome, potentially uncovering candidates for future functional studies.

DOI:

Publication date: June 14, 2024

Issue: Open GPB 2024

Type: Poster

Authors

Clara Holm1*, Nina Wiese1, Manuela Campa1, Johan Burger1, Justin Lashbrooke1

1 Genetics Department, Stellenbosch University, South Africa

Contact the author*

Keywords

variegation, grapevine, polyphenol oxidase activity, gene expression

Tags

IVES Conference Series | Open GPB | Open GPB 2024

Citation

Related articles…

Chemical and sensory diversity of regional Cabernet-Sauvignon wines

AIM: To investigate chemical and sensory drivers of regional typicity of Cabernet Sauvignon from different geographical regions of Australia.

Targeted and untargeted 1H-NMR analysis for sparkling wine’s authenticity

Studies on wineomics (wine’s metabolome) have increased considerably over the last two decades. Wine results from many environmental, human and biological factors leading to a specific metabolome for each terroir. NMR metabolomics is a particularly effective tool for studying the metabolome since it allows the rapid and simultaneous detection of major compounds from several chemical families.1 Quantitative NMR has already proven its effectiveness in monitoring the authenticity of still wines.

Vertical cordon training system enhances yield and delays ripening in cv. Maturana Blanca

The growing interest in minority grape varieties is due to their potential for adaptation to global warming and their oenological capabilities. However, the cultivation of these varieties has often been limited due to their low economic efficiency. One such example is Maturana Blanca, a recently recovered and authorized minority grape variety in the DOCa Rioja region, known for its remarkable oenological potential but low productivity. This study aimed to increase the yield of Maturana Blanca by implementing the vertical cordon training system, which allowed for a higher number of buds per plant and an increased cluster count per vine.

From vineyard to a glass of wine: the effect of abscisic acid application on mouhtaro, a rare autochthonous variety of greece

In a context of a sustainable viticulture, a new uprising strategy to improve grape and wine composition (or quality) is the exogenous application of plant activators(Gil-Muñoz et al., 2017)

Influence of soil type on juice quality in a vineyard from DO Ca Rioja

Soil plays an important role in wine quality, especially its water holding capacity because it affects the balance between vigour and grape yield. The aim of this work was to study the influence of different soil types on the must quality in a vineyard at DO Ca Rioja