Potato Virus M and Paracrinkle

Abstract

IN a recent communication under this title, Howard and Wainwright1 confirmed earlier reports2–4 that potato plants of the variety King Edward contain potato virus S plus paracrinkle virus. The communication calls for comment and elaboration because it suggests a uniformity of infection in King Edward plants that conflicts with my experience. During the past two years I have tested many plants from seven different commercial stocks of King Edward, and most contained both viruses ; but about 90 per cent of the plants in two of the stocks contained only paracrinkle virus, and one plant contained only virus S. This plant is the only one of the many hundreds tested by different workers since Salaman and Le Pelley's5 original work which did not contain paracrinkle virus.

References

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KASSANIS, B. Potato Virus M and Paracrinkle. Nature 188, 688 (1960). https://doi.org/10.1038/188688a0

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