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Molecular variability of sweet potato feathery mottle virus and other potyviruses infecting sweet potato in Peru

Abstract

Several potyviruses are found infecting sweet potato (Ipomoea batatas) in Peru, of which sweet potato feathery mottle virus (SPFMV, genus Potyvirus) is the most common. However, sequence data for these viruses are not available from Peru. In this study, the 3′-terminal ∼1,800 nucleotide sequences of 17 potyvirus samples collected from the six main sweet potato-producing areas of Peru over the past 20 years were determined and analyzed. Results of sequence comparisons and phylogenetic analysis showed that three of the four recognized SPFMV strain groups, including the East African strain, are established in Peru as well as two other potyviruses: sweet potato virus G (SPVG) and sweet potato virus 2 (SPV2). The analysis further revealed that SPFMV, SPVG and SPV2 are related and form an Ipomoea-specific phylogenetic lineage within the genus Potyvirus and identified for the first time recombination events between viruses from different strain groups of SPFMV.

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Acknowledgments

The study was partially supported by a joint project with the University of Helsinki (Prof. J.P.T. Valkonen; grant #1110797, Academy of Finland) aiming to develop durable resistance to SPVD. We are grateful to Jari Valkonen for critical reading of the manuscript, and to Jim Moyer for providing the YV isolate of SPFMV.

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Correspondence to Jan Kreuze.

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Untiveros, M., Fuentes, S. & Kreuze, J. Molecular variability of sweet potato feathery mottle virus and other potyviruses infecting sweet potato in Peru. Arch Virol 153, 473–483 (2008). https://doi.org/10.1007/s00705-007-0019-0

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Keywords

  • Sweet Potato
  • Strain Group
  • Bean Common Mosaic Virus
  • Recombination Detection Program
  • Sweet Potato Feathery Mottle Virus