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…

Application of remote sensing by unmanned aerial vehicles to map variability in Ontario Riesling and Cabernet Franc vineyards

The objective of this investigation was to verify usefulness of proximal sensing technology and unmanned aerial vehicles (UAVs) for mapping variables e.g., vine size (potential vigor), soil and vine water status, yield, fruit composition, and virus incidence in vineyards.

Re-examination and meta-analysis of previous research as a tool to evaluate the suitability of rootstocks in adaptation to global change. A study case from Spanish viticulture

Meta-analysis (MA) is a method that allows statistical synthesis of the results of several similar individual studies (Figure 1). This term was introduced by Glass in 1976 as a useful tool for the scientific community to pool and summarise the enormous amount of information collected in the literature.

The ability of wine yeasts fermenting by the addition of exogenous biotin

Research is focused on the increase of the field of obtaining the wine yeast, under physical and chemical conditions. Study of different influences on yeast production is very important for the promotion

Pierce’s disease of grapevines, a new threat to the wine industry in Southern Europe

Pierce’s disease (PD) is considered a potential threat to european viticulture (EPPO a2 list of pathogens since 1981). In the usa, infections caused by the vector-borne bacterium xylella fastidiosa have caused recurrent damage to vineyards in California and the southeastern states. However, vineyards in Europe have remained free of PD until recently, when it was first detected on the island of Mallorca in 2017. The reasons for the absence of PD in continental Europe have not been convincingly explained.

Aspect juridiques des terroirs

Le “terroir” est dans tous les discours, les articles, les étiquettes et les publicités. Le voca­ble est en situation d’utilisation euphorique. Indiscutablement l’emploi historique est agri­cole, puis viticole, mais il n’est jamais juridique.