terclim by ICS banner
IVES 9 IVES Conference Series 9 International Congress on Grapevine and Wine Sciences 9 2ICGWS-2023 9 Accumulation of deleterious mutations in grapevine and its relationship with traits of interest for wine production and resilience

Accumulation of deleterious mutations in grapevine and its relationship with traits of interest for wine production and resilience

Abstract

Deleterious mutations that severely reduce population fitness are rapidly removed from the gene pool by purifying selection. However, evolutionary drivers such as genetic drift brought about by demographic bottlenecks may comprise its efficacy by allowing deleterious mutations to accumulate, thereby limiting the adaptive potential of populations. Moreover, positive selection can hitchhike mildly deleterious mutations due to linkage caused by lack of recombination. Similarly, in the context of species domestication, artificial selection mimics these evolutionary processes, which can have undesirable consequences for production and resilience. In this study, we evaluated the extent of the accumulation of deleterious mutations and the magnitude of their effects (also known as genetic load) at the whole-genome scale for ca. 500 grapevines including both wild Vitis species originated in three geographical regions (North America, Asia and Europe), and commercial varieties of V. vinifera ssp. sativa (using Illumina paired-end sequencing 20x from the 4k project[1]). We comparatively estimated the overall efficacy of selection as the ratio of non-synonymous to synonymous mutations in protein coding regions. We also performed various functional prediction analyses on the genomic sequence data to identify deleterious alleles and their effect on gene expression to quantify genetic load. In addition, 40 of the sequenced grapevine varieties were evaluated in an experimental common garden in Bordeaux (VitAdapt[2]). We obtained phenotypic traits related to wine productivity and resilience (e.g., phenology, biomass growth, water use efficiency and grape production) which allowed to analyse the correlation between the estimated genetic load and phenotypes. The results obtained from this work will contribute to the understanding of how we can best account for deleterious alleles and genetic load in new-generation grapevine breeding.

Acknowledgements: This study received financial support from the French government in the framework of the IdEX Bordeaux University “Investments for the Future” program / GPR Bordeaux Plant Sciences, and from the University of Bordeaux (PurVitis project).

1)  Dong, Y.,et al. (2023). Dual domestications and origin of traits in grapevine evolution. Science, 379(6635), 892901.

2)  Destrac Irvine A. and van Leeuwen C. (2016) The VitAdapt project: extensive phenotyping of a wide range of varieties in order to optimize the use of genetic diversity within the Vitis vinifera species as a tool for adaptation to a changing environment. Climwine, sustainable grape and wine production in the context of climate change, 11-13 April 2016, Bordeaux. Full text proceedings paper, 165-171.

DOI:

Publication date: October 6, 2023

Issue: ICGWS 2023

Type: Poster

Authors

Enrique Sáez-Laguna 1*, Gaëtan Craye 1Agnes Destrac Irvine 2, Cornelis van Leeuwen 2, Nabil Girollet 2, Pierre-François Bert 2, Nathalie Ollat 2, Santiago González-Martínez 1, Marina de Miguel 2

1 BIOGECO, Univ. Bordeaux, INRAE, 33610 Cestas, France
2 EGFV, Univ. Bordeaux, Bordeaux Sciences Agro, INRAE, ISVV, 33882 Villenave d’Ornon, France

Contact the author*

Keywords

deleterious mutations, genetic load, fitness, grape, variety, production

Tags

2ICGWS | ICGWS | ICGWS 2023 | IVES Conference Series

Citation

Related articles…

Effects of progeny in the modulation of the response to water stress in isohydric and anisohydric varieties

Each grapevine variety has a specific water use regulation response under drought, and it is still unclear whether this regulation results from innate genotypic behavior (iso- and anisohydric), or is a response to environmental factors, namely recurrent water stress priming effects. In the present work, we explored the influence of the field-grown genotypes’ drought memory in the drought-response phenotype of their vegetative progenies, in Trincadeira (isohydric) and Castelão (anisohydric) varieties under a drought event followed by recovery in a glasshouse. Cuttings from both cultivars subjected to full irrigation (FI) and non-irrigation (NI) treatments for 5 consecutive years were used.

Metatranscriptomic analysis of “aszú” berries: the potential role of the most important species of the grape microbiota in the aroma of wines with noble rot

Botrytis cinerea has more than 1200 host plants and is one of the most important plant pathogens in viticulture. Under certain environmental conditions, it can lead to the development of a noble rot, which results in a specific metabolic profile, altering physical texture and chemical composition. The other microbes involved in this process and their functional genes are poorly characterised. We have generated metatranscriptomic [1,2] and DNA metabarcoding data from three months of the Furmint grape variety, representing the four phases of noble rot, from healthy berries to completely dried berries.

INTEGRAPE guidelines and tools: an effort of COST Action CA17111

INTEGRAPE was a European interdisciplinary network for “data integration to maximize the power of omics for grapevine improvement” (CA17111, https://integrape.eu/), funded by the European COST Association from September 2018 to 2022. This Action successfully developed guidelines and tools for data management and promoted the best practices in grapevine omics studies with a holistic future vision of: “Imagine having all data on grapevine accessible in a single place”.

is the overall ecological awarness among Spanish winemakers related to their attitudes towards natural wines?

The Agenda 2030 of the EU sets out the main guidelines for transitioning towards a resilient, green and safe economy. To this regard, the wine sector is experiencing an ecological transition in different ways such as increasing the production of ecological crops, or promoting the production of wines under more environmental-friendly and healthier (i.e., lower levels of SO2) products. These alternatives to conventional production are a smaller proportion of wines, in constant growth and demand, and follow alternative and minority practices, which range from sustainable to deeply philosophical thoughts. Among these methods there are organic, biodynamic and, more recently, natural wines.

Acceptability of canned wines: effect of the level of involvement of consumers and type of wine

In recent years there has been a growing demand for alternative packaging designs in the food industry focused on diminishing the carbon footprint. Despite the environmental advantages of cans versus bottles, the traditional environment of wine has hindered the establishment of less contaminant containers. In this context, the objective of this study was to understand and generate knowledge about consumers´ perception of canned wines in comparison to bottled wines.