Abstract
A new source of genetic resistance derived from Solanum tuberosum Group Phureja against Potato virus Y
(PVY) was identified and genetically characterised in three diploid
biparental potato populations. Segregation data for two populations
(05H1 and 08H1) suggested the presence of a single dominant gene for
resistance to PVY which, following DaRT analysis of the 08H1 cross, was
mapped to chromosome 9. More detailed genetic analysis of resistance
utilised a well-characterised SNP-linkage map for the 06H1 population,
together with newly generated marker data. In these plants, which have
both S. tuberosum Group Phureja and S. tuberosum Group Tuberosum
in their pedigree, the resistance was shown to map to chromosome 9 at a
locus not previously associated with PVY resistance, although there is
evidence for at least one other genetic factor controlling PVY
infection. The resistance factor location on chromosome 9 (named as
Ry(o)phu) suggests a potential role
of NB-LRR genes in this resistance. Phenotypic analysis using a
GUS-tagged virus revealed that a small amount of PVY replication
occurred in occasional groups of epidermal cells in inoculated leaves of
resistant plants, without inducing any visible hypersensitive response.
However, the virus did not enter the vascular system and systemic
spread was completely prevented.
Original language | English |
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Pages (from-to) | 967–980 |
Number of pages | 14 |
Journal | Theoretical and Applied Genetics |
Volume | 133 |
Early online date | 16 Jan 2020 |
DOIs | |
Publication status | Published - Mar 2020 |
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Lesley Torrance
- School of Biology - Emeritus Professor
- Biomedical Sciences Research Complex
Person: Emeritus Professor