The novel gene Ny-1 on potato chromosome IX confers hypersensitive resistance to Potato virus Y and is an alternative to Ry genes in potato breeding for PVY resistance
Open Access
- 6 November 2007
- journal article
- research article
- Published by Springer Science and Business Media LLC in Theoretical and Applied Genetics
- Vol. 116 (2), 297-303
- https://doi.org/10.1007/s00122-007-0667-1
Abstract
Hypersensitive resistance (HR) is an efficient defense strategy in plants that restricts pathogen growth and can be activated during host as well as non-host interactions. HR involves programmed cell death and manifests itself in tissue collapse at the site of pathogen attack. A novel hypersensitivity gene, Ny-1, for resistance to Potato virus Y (PVY) was revealed in potato cultivar Rywal. This is the first gene that confers HR in potato plants both to common and necrotic strains of PVY. The locus Ny-1 mapped on the short arm of potato chromosome IX, where various resistance genes are clustered in Solanaceous genomes. Expression of HR was temperature-dependent in cv. Rywal. Strains PVYO and PVYN, including subgroups PVYNW and PVYNTN, were effectively localized when plants were grown at 20°C. At 28°C, plants were systemically infected but no symptoms were observed. In field trials, PVY was restricted to the inoculated leaves and PVY-free tubers were produced. Therefore, the gene Ny-1 can be useful for potato breeding as an alternative donor of PVY resistance, because it is efficacious in practice-like resistance conferred by Ry genes.Keywords
This publication has 35 references indexed in Scilit:
- Combining Bioinformatics and Phylogenetics to Identify Large Sets of Single-Copy Orthologous Genes (COSII) for Comparative, Evolutionary and Systematic Studies: A Test Case in the Euasterid Plant CladeGenetics, 2006
- Potato Virus Y Resistance Gene, Ry chc, Mapped to the Distal End of Potato Chromosome 9Euphytica, 2006
- Effect of Temperature on the Expression of Necrosis in Soybean Infected with Soybean mosaic virusCrop Science, 2005
- ORGANIZATION OFGENESCONTROLLINGDISEASERESISTANCE IN THEPOTATOGENOMEAnnual Review of Phytopathology, 2001
- QTL Analysis of New Sources of Resistance to Erwinia carotovora ssp. atroseptica in Potato Done by AFLP, RFLP, and Resistance‐Gene‐Like MarkersCrop Science, 2000
- Examination of the Leaf-Drop Symptom of Virus-Infected Potato Using Anther Culture-Derived HaploidsPhytopathology®, 1998
- Resistance specificities to viruses in potato: Standardization of nomenclaturePlant Breeding, 1996
- Temperature-Dependent Induction of Salicylic Acid and Its Conjugates during the Resistance Response to Tobacco Mosaic Virus Infection.Plant Cell, 1992
- Effect of temperature on potato virus X infection in potato cultivars carrying different combinations of hypersensitivity genesPlant Pathology, 1986