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Updated: Jul 7, 2026

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Published on: September 25, 2014
Multiple Geographic Breakdown Events of the Rpv1-Rpv3.1 Pyramided Resistance in Grapevine by Plasmopara viticola
Rémi Pelissier1, Francois Delmotte1, Laurent Delière2
1INRAE, Bordeaux Sciences Agro, SAVE, ISVV, Villenave d'Ornon F-33140, France.
Abstract:
In 2024, three vineyard sites located within a radius of 40 km in southeastern France, each planted with Artaban, a grapevine variety carrying pyramided resistance (Rpv1 and Rpv3.1), exhibited severe downy mildew symptoms following climatic conditions highly conducive to disease development. Twenty-one Plasmopara viticola isolates were collected from these vineyards and, after monosporangium isolation, tested under controlled conditions on a panel of susceptible and resistant grapevine varieties to assess their virulence. Among the 21 tested field strains, 19 overcame Rpv3.1 mediated resistance, 10 overcame Rpv1 alone, and 4 genetically distinct strains from two separate vineyards were overcoming the pyramided Rpv1-Rpv3.1 combination. The genetic characterization of the strains suggests that this adaptation likely resulted from convergent evolution. To our knowledge, these represent the first documented cases in Europe of a breakdown in resistance conferred by Rpv1, whether deployed alone or in combination with Rpv3.1.[Formula: see text] Copyright © 2026 The Author(s). This is an open access article distributed under the CC BY 4.0 International license.
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