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 366899
Title The RPi-mcd1 Locus from Solanum microdontum Involved in Resistance to Phytophthora infestans, Causing a Delay in Infection, Maps on Potato Chromosome 4 in a Cluster of NBS-LRR Genes
Author(s) Tan, M.Y.A.; Hutten, R.C.B.; Celis Gamboa, B.C.; Park, T.H.; Niks, R.E.; Visser, R.G.F.; Eck, H.J. van
Source Molecular Plant-Microbe Interactions 21 (2008)7. - ISSN 0894-0282 - p. 909 - 918.
Department(s) Plant Breeding
Publication type Refereed Article in a scientific journal
Publication year 2008
Keyword(s) late blight resistance - broad-spectrum resistance - quantitative trait loci - foliage maturity type - field-resistance - hypersensitive response - durable resistance - linkage maps - r-genes - bulbocastanum
Abstract The distinction between field resistance and resistance based on resistance (R) genes has been proven valid for many plant¿pathogen interactions. This distinction does not seem to be valid for the interaction between potato and late blight. In this study, a locus involved in late blight resistance, derived from Solanum microdontum, provides additional evidence for this lack of distinction. The resistance is associated with a hypersensitive response and results in a delay of infection of approximately 1 to 2 weeks. Both a quantitative as well as a qualitative genetic approach were used, based on data from a field assay. Quantitative trait locus (QTL) analysis identified a QTL on chromosome 4 after correction of the resistance data for plant maturity. A qualitative genetic analysis resulted in the positioning of this locus on the short arm of chromosome 4 in between amplified fragment length polymorphism marker pCTmACG_310 and cleaved amplified polymorphic sequence markers TG339 and T0703. This position coincides with a conserved Phytophthora R gene cluster which includes R2, R2-like, RPi-blb3, and RPi-abpt. This implies that RPi-mcd1 is the fifth R gene of this nucleotide-binding site leucine-rich repeat cluster. The implications of our results on R-gene-based and field resistance are discussed
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