Phytophthora infestans isolates lacking class I ipiO variants are virulent on Rpi-blb1 potato
- Champouret, N.
- Bouwmeester, K.
- Rietman, H.
- Lee, T., van der
- Maliepaard, C.A.
- Heupink, A.
- Vondervoort, P.J.I., van de
- Jacobsen, E.
- Visser, R.G.F.
- Vossen, E.A.G., van der
- Govers, F.
- Vleeshouwers, V.G.A.A.
DOIAbstract
A strategy to control the devastating late blight disease is providing potato cultivars with genes that are effective in resistance to a broad spectrum of Phytophthora infestans isolates. Thus far, most late blight resistance (R) genes that were introgressed in potato were quickly defeated. In contrast, the Rpi-blb1 gene originating from Solanum bulbocastanum has performed as an exclusive broad-spectrum R gene for many years. Recently, the RXLR effector family ipiO was identified to contain Avr-blb1. Monitoring the genetic diversity of the ipiO family in a large set of isolates of P. infestans and related species resulted in 16 ipiO variants in three distinct classes. Class I and class II but not class III ipiO variants induce cell death wh...
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