A new virus, classifiable in the family Tombusviridae, found infecting Solanum tuberosum in the UK
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A novel virus was discovered in a freeze-dried collection held at SASA, UK, originating from potato (Solanum tuberosum) cv. Nadine. The complete sequence of the viral RNA was determined to be 3674 nucleotides in length encoding five predicted proteins. Based on the deduced genome organization and phylogenetic analysis, this virus represents a putative new member of the genus Alphanecrovirus, family Tombusviridae, most closely related to isolates of Olive mild mosaic virus. The virus was easily transmitted to indicator plants with symptoms that were slower to develop and less severe than those of related viruses. To distinguish this virus, the clearest symptom differences occurred with Nicotiana debneyi, Chenopodium amaranticolor and Ch. quinoa. The virus was detected with antisera to the related viruses tobacco necrosis virus A and tobacco necrosis virus D. The close association to the tobacco necrosis viruses would suggest this virus is not a new introduction to potato but in the past has been misidentified as one of these viruses. The virus isolate has been named potato necrosis virus.
The authors wish to thank Robyn DeYoung, Pacific Agri-Food Research Centre, Canada and Annelien Roenhorst, Plant Protection Service, The Netherlands for providing virus isolates for this work and Ross Holmes, Catherine Thomson, Sandra Goodfellow and Carolyn Nisbet, SASA for technical assistance.
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Conflict of interest
All authors declare they have no conflict of interests.
Research involving human participation and/or animals
This article does not contain any studies with human participants or animals performed by any of the authors.
All authors declare they have informed consent. This study was funded by SASA as part of a programme by the United Kingdom Quarantine Unit, SASA to become an approved source of high health potato material for Australia (http://www.agriculture.gov.au/biosecurity/risk-analysis/plant/review_potato/final-potato).
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