Resistance to virus diseases of some F1 clones descended from the species hybridization Solanum demissum x S. tuberosum

Authors

• Onni Pohjakallio Department of Plant Pathology, University of Helsinki
• Laura Karhuvaara Department of Plant Pathology, University of Helsinki

DOI: https://doi.org/10.23986/afsci.71538

Abstract

The following are the main conclusions to be drawn from the results of experiments in which the resistance of F1 clones descended from the species hybridization Solanum demissum x S. tuberosum (Rosafolia) was investigated: The clones forming purple tubers appeared to be very susceptible to the potato rugose. Bud mutants descended from the former, forming white tubers, appeared to be wholly resistant to this virus. The virus accelerated the onset of tuber formation and the decline of the haulms of the susceptible F1 plants. The degeneration of the virus-diseased plants did not progress from one vegetative generation to the next; instead, the virus altered the rate of development of the potato plant to a new level.