Complete genome sequence of a putative new secovirus infecting yam (Dioscorea) plants

Arch Virol. 2017 Jan;162(1):317-319. doi: 10.1007/s00705-016-3104-4. Epub 2016 Oct 11.


The complete genome sequence of a new virus infecting yam plants exhibiting mosaic symptom in Brazil was determined. The genome of this virus is composed of two molecules of positive-sense RNAs of 5979 and 3809 nucleotides in length, excluding the poly(A) tails. One large open reading frame (ORF) in each genomic segment (RNA1-ORF1 and RNA2-ORF2) was predicted. The highest amino acid sequence similarity in the Pro-Pol core region of RNA1 and the CP region of RNA2 was observed with chocolate lily virus A (a putative member of the family Secoviridae), with 54.6 and 27.7 % identity, respectively. This virus is thus likely to be a new member of the family Secoviridae, and we propose the tentative name "dioscorea mosaic-associated virus" (DMaV) for this virus.

MeSH terms

  • Brazil
  • Cluster Analysis
  • Dioscorea / virology*
  • Genome, Viral*
  • Open Reading Frames
  • Phylogeny
  • Plant Diseases / virology
  • Plant Viruses / classification
  • Plant Viruses / genetics
  • Plant Viruses / isolation & purification*
  • RNA Viruses / classification
  • RNA Viruses / genetics
  • RNA Viruses / isolation & purification*
  • RNA, Viral / genetics*
  • Sequence Analysis, DNA*
  • Sequence Homology, Amino Acid


  • RNA, Viral