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Resistance to Alternaria solani in hybrids between a Solanum tuberosum haploid and S. raphanifolium.
- Source :
-
Phytopathology [Phytopathology] 2012 Feb; Vol. 102 (2), pp. 214-21. - Publication Year :
- 2012
-
Abstract
- Early blight of potato (Solanum tuberosum), caused by the foliar fungal pathogen Alternaria solani, is a major cause of economic loss in many potato-growing regions. Genetic resistance offers an opportunity to decrease fungicide usage while maintaining yield and quality. In this study, an early blight resistant clone of the diploid wild species S. raphanifolium was crossed as a male to a haploid (2n=2x) of cultivated potato. Hybrids were backcrossed to both parents. Eight families were created and evaluated for early blight resistance in the field. Families created by backcrossing to the wild species parent exhibited significantly lower relative area under the disease progress curve means than those from backcrossing to the cultivated parent, leading to the conclusion that S. raphanifolium contributes genes for early blight resistance. The mechanism of resistance in S. raphanifolium is unique because A. solani could not be recovered from lesions. Clones were identified with high levels of resistance and adaptation to the photoperiod of a temperate production region.
- Subjects :
- Alternaria physiology
Chimera genetics
Chimera immunology
Chimera microbiology
Crosses, Genetic
Diploidy
Environment
Genotype
Haploidy
Host-Pathogen Interactions
Inbreeding
Photoperiod
Plant Diseases microbiology
Plant Tubers microbiology
Solanum tuberosum microbiology
Alternaria immunology
Disease Resistance genetics
Plant Diseases immunology
Solanum tuberosum genetics
Solanum tuberosum immunology
Subjects
Details
- Language :
- English
- ISSN :
- 0031-949X
- Volume :
- 102
- Issue :
- 2
- Database :
- MEDLINE
- Journal :
- Phytopathology
- Publication Type :
- Academic Journal
- Accession number :
- 22007613
- Full Text :
- https://doi.org/10.1094/PHYTO-05-11-0146