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IVES 9 IVES Conference Series 9 Exploring diversity of grapevine responses to Flavescence dorée infection

Exploring diversity of grapevine responses to Flavescence dorée infection

Abstract

Flavescence dorée, a serious threat to grapevine cultivation in several European Countries, is caused by phytoplasmas in the 16Sr-V ribosomal group, classified as quarantine organisms in the EU and transmitted mainly by the insect vector Scaphoideus titanus. The disease is controlled only by indirect and preventive measures, with important economic and environmental concerns. Genetic resources from the great variety of Vitis vinifera germplasm together with application of new genomic techniques could be applied to produce resistant/tolerant plants, once the genetic bases of susceptibility are elucidated. In a current Italian project (BIORES*) we are evaluating different international and local grapevine cvs. as well as microvine plants for their response to FD transmission and multiplication in controlled conditions. Infective vectors were caged onto potted plants of 8 varieties for 5 weeks. Insect survival and infectivity were monitored and plant infections were quantitatively tested 11 weeks post inoculation.
In parallel, previous data and materials generated by the Project Consortium are being mined to select putative resistance- or susceptibility-related genes, to be further validated in functional analyses, either on already produced transgenic plants or in future genome editing experiments to introduce precise targeted mutations in candidate genes of the highly susceptible cv. Chardonnay, with the final goal of reducing FD susceptibility without compromising other productive traits.

*Funded by the European Union – NextGenerationEU.

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DOI:

Publication date: June 13, 2024

Issue: Open GPB 2024

Type: Poster

Authors

Francesca Cavagna1, Enea Guerrieri1, Davide Danzi1, Sabrina Palmano2, Cristina Marzachì2, Nicola Mori1, Annalisa Polverari1*

1 Department of Biotechnology, University of Verona, via della Pieve 70, San Pietro in Cariano, Verona, Italy
2 Institute for Sustainable Plant Protection, CNR, Strada delle Cacce 73, 10135 Torino, Italy

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Keywords

Phytoplasma, Germplasm, Breeding, Genome editing, Sustainable viticulture

Tags

IVES Conference Series | Open GPB | Open GPB 2024

Citation

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