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 412024
Title Mapping of the S. demissum late blight resistance gene R8 to a new locus on chromosome IX
Author(s) Jo, K.R.; Arens, M.J.B.; Kim, T.Y.; Jongsma, M.A.; Visser, R.G.F.; Jacobsen, E.; Vossen, J.H.
Source Theoretical and Applied Genetics 123 (2011)8. - ISSN 0040-5752 - p. 1331 - 1340.
Department(s) Laboratory of Plant Breeding
WUR Plant Breeding
PRI BIOS Applied Metabolic Systems
Publication type Refereed Article in a scientific journal
Publication year 2011
Keyword(s) potato late blight - phytophthora-infestans mont - broad-spectrum resistance - race-specific resistance - solanum-bulbocastanum - confers resistance - nucleotide-binding - field-resistance - r1 gene - tomato
Abstract The use of resistant varieties is an important tool in the management of late blight, which threatens potato production worldwide. Clone MaR8 from the Mastenbroek differential set has strong resistance to Phytophthora infestans, the causal agent of late blight. The F1 progeny of a cross between the susceptible cultivar Concurrent and MaR8 were assessed for late blight resistance in field trials inoculated with an incompatible P. infestans isolate. A 1:1 segregation of resistance and susceptibility was observed, indicating that the resistance gene referred to as R8, is present in simplex in the tetraploid MaR8 clone. NBS profiling and successive marker sequence comparison to the potato and tomato genome draft sequences, suggested that the R8 gene is located on the long arm of chromosome IX and not on the short arm of chromosome XI as was suggested previously. Analysis of SSR, CAPS and SCAR markers confirmed that R8 was on the distal end of the long arm of chromosome IX. R gene cluster directed profiling markers CDPSw54 and CDPSw55 flanked the R8 gene at the distal end (1 cM). CDPTm21-1, CDPTm21-2 and CDPTm22 flanked the R8 gene on the proximal side (2 cM). An additional co-segregating marker (CDPHero3) was found, which will be useful for marker assisted breeding and map based cloning of R8.
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