Summary
DiploidSolanum phureja, diploid and tetraploidS. tuberosum × S. phureja hybrid, and tetraploidS. tuberosum backcross clones were assessed for resistance to commercially important diseases. There was a reduction in the expression ofS. phureja characteristics with increasing dosage ofS. tuberosum genetic material. The generally high resistance of theS. phureja group to common scab, potato leafroll virus and potato virus Y decreased, while resistance to gangrene, foliage and tuber blight tended to increase.
Resistance genes were probably well dispersed throughout theS. phureja genotype so that many were lost on hybridisation, butS. phureja could be a useful source of scab and virus resistance in the production ofS. tuberosum cultivars.
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De Maine, M.J., Carroll, C.P., Stewart, H.E. et al. Disease resistance inSolanum phureja and diploid and tetraploidS. tuberosum × S. phureja hybrids. Potato Res 36, 21–28 (1993). https://doi.org/10.1007/BF02359830
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DOI: https://doi.org/10.1007/BF02359830