terclim by ICS banner
IVES 9 IVES Conference Series 9 Characterization of bunch compactness and identification of associated genes in a diverse collection of cultivars of Vitis vinifera L.

Characterization of bunch compactness and identification of associated genes in a diverse collection of cultivars of Vitis vinifera L.

Abstract

Compactness is a complex trait of V. vinifera L. and is defined ultimately by the portion of free space within the bunch which is not occupied by the berries. A high degree of compactness results in poor ventilation and consequently a higher susceptibility to fungal diseases, diminishing the quality of the fruit. The easiness to conceptualize the trait and its importance arguably contrasts with the difficulty to measure and quantify it. However, recent technical advancements have allowed to study this attribute more accurately over the last decade. Our main objective was to explore the underlying genetics determining bunch compactness by applying updated phenotyping methods in a collection of V. vinifera L. cultivars with a wide genetic diversity.
A collection of 116 genotypes composed by 24 wine, 56 table and 26 mixed usage varieties was characterized over two seasons measuring several traits determining Compactness Indexes (CI), as proposed in literature. CI-18 performed the best on this collection and genotypes with extreme values with loose and dense bunches were further studied (n = 10 each group). RNA of these samples was collected at key developmental stages to study the expression of VvUCC1, VvGRF4 and other genes associated to this trait. We also evaluated the performance of automated phenotyping for this wide collection of varieties by applying precision phenotyping through 3D scan and point cloud library-based methods. Combining this data with 127,631 informative SNPs identified by genotyping-by-sequencing could lead to identify further loci associated with this attribute through GWAS.

Download the abstract

DOI:

Publication date: June 14, 2024

Issue: Open GPB 2024

Type: Poster

Authors

Marco Meneses1, Renato Fuentes1, Ignacia Fuentes1, Claudia Muñoz-Espinoza2, Carolina Araya1, Juan Iribarra1, Erika Salazar1, Claudio Meneses3, Katja Herzog4, Patricio Hinrichsen1*

1 Instituto de Investigaciones Agropecuarias, INIA La Platina. Santiago, Chile.
2 Agronomy Faculty, Universidad de Concepción. Chillán, Chile.
3 Agronomy Faculty, P. Universidad Católica de Chile. Santiago, Chile.
4 Julius Kühn-Institut. Institute for Grapevine Breeding. Geilweilerhof, Germany.

Contact the author*

Keywords

Bunch compactness, qPCR, GBS, automated phenotyping

Tags

IVES Conference Series | Open GPB | Open GPB 2024

Citation

Related articles…

Exploring relationships among grapevine chemical and physiological parameters and mycobiome composition under drought stress

Improving our knowledge on biotic and abiotic factors that influence the composition of the grapevine mycobiome is of great agricultural significance, due to potential effects on plant health, productivity, and wine characteristics. Among the various environmental factors affecting the morphological, physiological, biochemical and molecular attributes of grapevine, drought stress is one of the most severe, becoming increasingly an issue worldwide.

Read More

Correlation between grape and wine quality, landscape diversity, on-field biodiversity, in doc gioia del colle, italy

Analysis of aerial photos by using GIS tools and on-field surveys of flora are used to characterize territories from an agro-ecological point of view and to assess the level of diversity of given agro-ecosystems. More and more correlations between landscape characteristics, sustainability and quality of agriculture production were speculated. In last three years a study was carried out in the area of DOC “Gioia del Colle” in Apulia, South Italy, in order to characterize and investigate different vineyards and sites and find out possible interactions and correlations between the landscape diversity, the biodiversity of fields and the quality of grapes and wines.

Read More

Use of the soils information system for detailed vineyard soil surveys and as a component of precision viticulture

Vineyard soil surveys can be costly and time consuming. The Soils Information System (SIS) provides a set of tools to do a quick evaluation of soil physical properties in the vineyard. First, a system equipped with GPS and EM38 equipment, provides a very precise DEM and a soil electrical conductivity map. Specific sampling points are located for a tractor-mounted geotechnical probe to make soil physical measurements.

Read More

Ampelograpic and genetic characterisation of grapevine genetic resources from Ozalj-Vivodina region (Croatia)

Ozalj- vivodina region is small vine growing area (only about 100 hectares of vineyards), but with significant number of old, ancient vineyards planted between 50 and 100 years ago. Trend of abandoning or replanting ancient vineyards takes place for the last 30 years. This trend results in grapevine germplasm erosion because traditional varieties are replaced with well known international varieties.Few known traditional varieties are dominantly present in ancient vineyards together with many others of unknown identity. Historical data about prevalence and characteristic of varieties on this area are very poor.

Read More

Function, barriers, and the environmental benefits of reuse bottle system for wine

With 0.3 to 0.7 kg CO2eq per 0.75 L wine, the glass bottle is the main contributor to the carbon footprint of a bottle of wine.

Read More