Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 535432
Title Two different R gene loci co-evolved with Avr2 of Phytophthora infestans and confer distinct resistance specificities in potato
Author(s) Aguilera-Galvez, C.; Champouret, N.; Rietman, H.; Lin, X.; Wouters, D.; Chu, Z.; Jones, J.D.G.; Vossen, J.H.; Visser, R.G.F.; Wolters, P.J.; Vleeshouwers, V.G.A.A.
Source Studies in Mycology 89 (2018). - ISSN 0166-0616 - p. 105 - 115.
DOI https://doi.org/10.1016/j.simyco.2018.01.002
Department(s) Laboratory of Plant Breeding
WUR PB Biodiversiteit en Genetische Variatie
WUR PB Resistance in Solanaceae
PE&RC
EPS
PBR Biodiversiteit en Genetische Variatie
Publication type Refereed Article in a scientific journal
Publication year 2018
Keyword(s) Avr gene - Co-evolution - Late blight - Phytophthora infestans - Potato - R gene - Resistance - Solanum
Abstract Late blight, caused by the oomycete pathogen Phytophthora infestans, is the most devastating disease in potato. For sustainable management of this economically important disease, resistance breeding relies on the availability of resistance (R) genes. Such R genes against P. infestans have evolved in wild tuber-bearing Solanum species from North, Central and South America, upon co-evolution with cognate avirulence (Avr) genes. Here, we report how effectoromics screens with Avr2 of P. infestans revealed defense responses in diverse Solanum species that are native to Mexico and Peru. We found that the response to AVR2 in the Mexican Solanum species is mediated by R genes of the R2 family that resides on a major late blight locus on chromosome IV. In contrast, the response to AVR2 in Peruvian Solanum species is mediated by Rpi-mcq1, which resides on chromosome IX and does not belong to the R2 family. The data indicate that AVR2 recognition has evolved independently on two genetic loci in Mexican and Peruvian Solanum species, respectively. Detached leaf tests on potato cultivar ‘Désirée’ transformed with R genes from either the R2 or the Rpi-mcq1 locus revealed an overlapping, but distinct resistance profile to a panel of 18 diverse P. infestans isolates. The achieved insights in the molecular R – Avr gene interaction can lead to more educated exploitation of R genes and maximize the potential of generating more broad-spectrum, and potentially more durable control of the late blight disease in potato.
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