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Molecular characterization of yam virus X, a new potexvirus infecting yams (Dioscorea spp) and evidence for the existence of at least three distinct potexviruses infecting yams

Acina Manbole Isabelle Nina, Bonheur Lydiane, Svanella-Dumas Laurence, Filloux Denis, Gomez Rose-Marie, Faure Chantal, Lange David, Anzala Fabiola, Pavis Claudie, Marais Armelle, Roumagnac Philippe, Candresse Thierry, Teycheney Pierre-Yves. 2014. Molecular characterization of yam virus X, a new potexvirus infecting yams (Dioscorea spp) and evidence for the existence of at least three distinct potexviruses infecting yams. Archives of Virology, 159 (12) : pp. 3421-3426.

Journal article ; Article de revue à facteur d'impact
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Quartile : Q3, Sujet : VIROLOGY

Abstract : The genome of yam virus X (YVX), a new member of the genus Potexvirus from yam (Dioscorea trifida), was completely sequenced. Structural and phylogenetic analysis showed that the closest relative of YVX is nerine virus X. A prevalence study found YVX only in plants maintained in Guadeloupe and showed that it also infects members of the complex D. cayenensis rotundata. This study provides evidence for the existence of two additional potexviruses, one of which infects D. nummularia in Vanuatu and the other, D. bulbifera and D. rotundata in Haiti and D. trifida and D. rotundata in Guadeloupe. This work also shows that existing potexvirus-specific degenerate primers targeting the ORF1-encoded polymerase domain are well suited for the identification of the three potexviruses reported here. (Résumé d'auteur)

Mots-clés Agrovoc : Dioscorea, Potexvirus, Virologie, Génome, Biologie moléculaire, Espèce nouvelle, Dioscorea cayenensis, Dioscorea nummularia, Dioscorea bulbifera, Dioscorea rotundata, Dioscorea trifida, Identification

Mots-clés géographiques Agrovoc : Guadeloupe, Vanuatu, Haïti

Mots-clés complémentaires : Potexvirus x igname, Émergence

Classification Agris : H20 - Plant diseases

Champ stratégique Cirad : Axe 4 (2014-2018) - Santé des animaux et des plantes

Auteurs et affiliations

  • Acina Manbole Isabelle Nina, CIRAD-BIOS-UMR AGAP (GLP)
  • Bonheur Lydiane
  • Svanella-Dumas Laurence, INRA (FRA)
  • Filloux Denis, CIRAD-BIOS-UMR BGPI (FRA)
  • Gomez Rose-Marie, INRA (GLP)
  • Faure Chantal, INRA (FRA)
  • Lange David, INRA (GLP)
  • Anzala Fabiola
  • Pavis Claudie, INRA (GLP)
  • Marais Armelle, INRA (FRA)
  • Roumagnac Philippe, CIRAD-BIOS-UMR BGPI (FRA) ORCID: 0000-0001-5002-6039
  • Candresse Thierry, INRA (FRA)
  • Teycheney Pierre-Yves, CIRAD-BIOS-UMR AGAP (GLP) ORCID: 0000-0002-9754-0745

Source : Cirad - Agritrop (https://agritrop.cirad.fr/574499/)

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