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Archives of Virology

, Volume 149, Issue 5, pp 1045–1060 | Cite as

Virology Division News: The new plant virus family Flexiviridae and assessment of molecular criteria for species demarcation

  • M. J. Adams
  • J. F. Antoniw
  • M. Bar-Joseph
  • A. A. Brunt
  • T. Candresse
  • G. D. Foster
  • G. P. Martelli
  • R. G. Milne
  • C. M. Fauquet
Article

Summary.

The new plant virus family Flexiviridae is described. The family is named because its members have flexuous virions and it includes the existing genera Allexivirus, Capillovirus, Carlavirus, Foveavirus, Potexvirus, Trichovirus and Vitivirus, plus the new genus Mandarivirus together with some related viruses not assigned to any genus. The family is justified from phylogenetic analyses of the polymerase and coat protein (CP) sequences. To help to define suitable molecular criteria for demarcation of species, a complete set of pairwise comparisons was made using the nucleotide (nt) and amino acid (aa) sequences of each fully-sequenced gene from every available accession in the family. Based on the distributions and on inspection of the data, it was concluded that, as a general rule, distinct species have less than ca. 72% identical nt or 80% identical aa between their entire CP or replication protein genes.

Keywords

Nucleotide Phylogenetic Analysis Pairwise Comparison General Rule Protein Gene 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag/Wien 2004

Authors and Affiliations

  • M. J. Adams
    • 1
  • J. F. Antoniw
    • 1
  • M. Bar-Joseph
    • 2
  • A. A. Brunt
    • 3
  • T. Candresse
    • 4
  • G. D. Foster
    • 5
  • G. P. Martelli
    • 6
  • R. G. Milne
    • 7
  • C. M. Fauquet
    • 8
  1. 1.Plant Pathogen Interactions DivisionRothamsted ResearchHarpendenU.K.
  2. 2.Institute of Plant Protection, Agricultural Research Organization, The Volcani CenterBet DaganIsrael
  3. 3.Department of Microbiology and Plant PathologyHorticulture Research InternationalWellesbourneU.K.
  4. 4.Equipe de Virologie, UMR GD2P, Villenave d’OrnonFrance
  5. 5.School of Biological Sciences, University of BristolBristolU.K.
  6. 6.Dipartimento di Protezione delle Piante e Microbiologia ApplicataBariItaly
  7. 7.Istituto di Virologia Vegetale CNRTorinoItaly
  8. 8.ILTAB, Danforth Plant Science CenterSt LouisU.S.A.

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