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 328487
Title The R3 resistance to Phytophthora infestans in potato is conferred by two closely linked R genes with distinct specificities
Author(s) Huang, S.; Vleeshouwers, V.G.A.A.; Werij, J.S.; Hutten, R.C.B.; Eck, H.J. van; Visser, R.G.F.; Jacobsen, E.
Source Molecular Plant-Microbe Interactions 17 (2004)4. - ISSN 0894-0282 - p. 428 - 435.
Department(s) Plant Breeding
Publication type Refereed Article in a scientific journal
Publication year 2004
Keyword(s) broad-spectrum resistance - race-specific resistance - disease resistance - hypersensitive response - comparative genetics - cladosporium-fulvum - nucleotide-binding - late blight - tomato - plants
Abstract The R3 locus of potato (Solanum tuberosum L.) confers full resistance to avirulent isolates of Phytophthora infestans, the causal agent of late blight. R3 resides in the distal part of chromosome 11 and segregates in a potato mapping population, from which a well-saturated amplified fragment length polymorphism map is available. Using a population of 1,748 plants, we constructed a high-resolution genetic map at the R3 locus. Using the combination of fine mapping and accurate disease testing with specific P infestans isolates, we detected that the R3 locus is composed of two genes with distinct specificities. The two genes R3a and R3b are 0.4 cM apart and have both been introgressed from S. demissum, the 'donor' species of most characterized race-specific R genes to P infestans. A natural recombinant between R3a and R3b was discovered in one accession of S. demissum. The synteny between the R3 locus and the tomato 12 locus is discussed.
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