Plant Disease (2020) 104, 2074-2081

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Andrea Patocchi, Andreas Wehrli, Pierre-Henri Dubuis, Annemarie Auwerkerken, Carmen Leida, Guido Cipriani, Tom Passey, Martina Staples, Frédérique Didelot, Vincent Philion, Andreas Peil, Hannes Laszakovits, Thomas Rühmer, Klemens Boeck, Danas Baniulis, Klaus Strasser, Radek Vávra, Walter Guerra, Sylwester Masny, Franz Ruess, Fanny Le Berre, Hilde Nybom, Stefano Tartarini, Andreas Spornberger, Anna Pikunova and Vincent G.M. Bus (2020)
Ten years of VINQUEST: First insight for breeding new apple cultivars with durable apple scab resistance
Plant Disease 104 (8), 2074-2081
Abstract: Apple scab, caused by Venturia inaequalis, is a major fungal disease worldwide. Cultivation of scab-resistant cultivars would reduce the chemical footprint of apple production. However, new apple cultivars carrying durable resistances should be developed to prevent or at least slow the breakdown of resistance against races of V. inaequalis. One way to achieve durable resistance is to pyramid multiple scab resistance genes in a cultivar. The choice of the resistance genes to be combined in the pyramids should take into account the frequency of resistance breakdown and the geographical distribution of apple scab isolates able to cause such breakdowns. In order to acquire this information and to make it available to apple breeders, the VINQUEST project was initiated in 2009. Ten years after launching this project, 24 partners from 14 countries regularly contribute data. From 2009 to 2018, nearly 9,000 data points have been collected. This information has been used to identify the most promising apple scab resistance genes for developing cultivars with durable resistance, which to date are: Rvi5, Rvi11, Rvi12, Rvi14, and Rvi15. As expected, Rvi1, together with Rvi3 and Rvi8, were often overcome, and have little value for scab resistance breeding. Rvi10 may also belong to this group. On the other hand, Rvi2, Rvi4, Rvi6, Rvi7, Rvi9, and Rvi13 are still useful for breeding, but their use is recommended only in extended pyramids of >3 resistance genes.
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Database assignments for author(s): Andrea Patocchi, Vincent Philion, Andreas Peil, Vincent G.M. Bus

Research topic(s) for pests/diseases/weeds:
resistance/tolerance/defence of host

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Venturia inaequalis	Apple (Malus)