Dissection of foliage and tuber late blight resistance in mapping populations of potato

The devastating late blight pathogen Phytophthora infestans infects foliage as well as tubers of potato. To date, resistance breeding has often focused on foliage blight resistance, but tuber blight resistance is becoming more and more important in cultivated potatoes. In this study, a reliable tube...

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Bibliographic Details
Published in:Euphytica 2005, Vol.143 (1-2), p.75-83
Main Authors: Park, T.H, Vleeshouwers, V.G.A.A, Kim, J.B, Hutten, R.C.B, Visser, R.G.F
Format: Article
Language:English
Subjects:
Agronomy. Soil science and plant productions
bioassays
Biological and medical sciences
blight
disease resistance
Foliage
foliar diseases
Fundamental and applied biological sciences. Psychology
fungal diseases of plants
Gene mapping
gene segregation
genes
Genetics
Genetics and breeding of economic plants
inheritance (genetics)
leaf blight
Pest resistance
Phytophthora infestans
Plant pathogens
Potatoes
quantitative trait loci
R genes
Solanum tuberosum
tubers
Varietal selection. Specialized plant breeding, plant breeding aims
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Summary:The devastating late blight pathogen Phytophthora infestans infects foliage as well as tubers of potato. To date, resistance breeding has often focused on foliage blight resistance, but tuber blight resistance is becoming more and more important in cultivated potatoes. In this study, a reliable tuber assay for resistance assessment was developed and foliage and tuber blight resistance (R) was compared in four mapping populations. In the RH4X-103 population, tuber blight resistance inherited independently from foliage blight resistance. Three specific R genes against P. infestans were segregating. The Rpi-abpt and R3a genes function as foliage-specific R genes, whereas the R1 gene acts on both foliage and tuber. In the segregating populations SHRH and RH94-076, tuber and foliage blight resistance correlated significantly, which suggests that resistance in foliage and tuber is conferred by the same gene (could be R3b) and quantitative trait loci (QTL), respectively. In the CE population neither tuber nor foliage resistance was observed.[PUBLICATION ABSTRACT]
ISSN:0014-2336
1573-5060
DOI:10.1007/s10681-005-2658-0