Major-effect QTLs for stem and foliage resistance to late blight in the wild potato relatives Solanum sparsipilum and S. spegazzinii are mapped to chromosome X

To find out new resistance sources to late blight in the wild germplasm for potato breeding, we examined the polygenic resistance of Solanum sparsipilum and S. spegazzinii by a quantitative trait locus (QTL) analysis. We performed stem and foliage tests under controlled conditions in two diploid map...

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Bibliographic Details
Published in:Theoretical and applied genetics 2009-08, Vol.119 (4), p.705-719
Main Authors: Danan, Sarah, Chauvin, Jean-Eric, Caromel, Bernard, Moal, Jean-Denis, Pellé, Roland, Lefebvre, Véronique
Format: Article
Language:English
Subjects:
Agricultural sciences
Agriculture
Biochemistry
Biological and medical sciences
Biomedical and Life Sciences
Biotechnology
Chromosome Mapping
Chromosomes
Chromosomes, Plant - genetics
Classical genetics, quantitative genetics, hybrids
Epistasis, Genetic
Fundamental and applied biological sciences. Psychology
Fungicides
Genes
Genetic Markers
Genetics of eukaryotes. Biological and molecular evolution
Immunity, Innate - genetics
Infections
Leaves
Life Sciences
Original Paper
Pathogens
Pesticides
Plant Biochemistry
Plant Breeding/Biotechnology
Plant Diseases - genetics
Plant Diseases - immunology
Plant Genetics and Genomics
Plant Leaves - genetics
Plant Stems - genetics
Polymorphism
Potatoes
Principal Component Analysis
Pteridophyta, spermatophyta
Quantitative Trait Loci - genetics
Solanum tuberosum - genetics
Vegetals
Virulence
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Summary:To find out new resistance sources to late blight in the wild germplasm for potato breeding, we examined the polygenic resistance of Solanum sparsipilum and S. spegazzinii by a quantitative trait locus (QTL) analysis. We performed stem and foliage tests under controlled conditions in two diploid mapping progenies. Four traits were selected for QTL detection. A total of 30 QTLs were mapped, with a large-effect QTL region on chromosome X detected in both potato relatives. The mapping of literature-derived markers highlighted colinearities with published late blight QTLs or R-genes. Results showed (a) the resistance potential of S. sparsipilum and S. spegazzinii for late blight control, and (b) the efficacy of the stem test as a complement to the foliage test to break down the complex late blight resistance into elementary components. The relationships of late blight resistance QTLs with R-genes and maturity QTLs are discussed.
ISSN:0040-5752
1432-2242
DOI:10.1007/s00122-009-1081-7