Yam asymptomatic virus 1, a novel virus infecting yams (Dioscorea spp.) with significant prevalence in a germplasm collection

Marais Armelle, Umber Marie, Filloux Denis, Gomez Rose-Marie, Faure Chantal, Pavis Claudie, Julian Charlotte, Roumagnac Philippe, Acina Manbole Isabelle Nina, Bonheur Lydiane, Theil Sébastien, Contreras Sandy, Candresse Thierry, Teycheney Pierre-Yves. 2020. Yam asymptomatic virus 1, a novel virus infecting yams (Dioscorea spp.) with significant prevalence in a germplasm collection. Archives of Virology, 5 p.

Journal article ; Article de recherche ; Article de revue à facteur d'impact
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Abstract : A novel virus infecting yams (Dioscorea spp.), tentatively named “yam asymptomatic virus 1” (YaV1), was characterized and sequenced from an asymptomatic D. alata plant from Vanuatu. Sequence comparisons and phylogenetic analysis showed that YaV1 is a novel ampelovirus and has the smallest genome among “subgroup 1” members. RT-PCR-based screening of a yam germplasm collection conserved in Guadeloupe showed that YaV1 is prevalent in D. alata, D. bulbifera, D. cayen-nensis subsp. rotundata, D. esculenta and D. trifida accessions but causes no apparent symptoms. Additional phylogenetic analysis revealed a low variability of YaV1 in Guadeloupe in a limited part of the genome, and suggested the occurrence of plant-to-plant transmission.

Classification Agris : H20 - Plant diseases

Champ stratégique Cirad : CTS 4 (2019-) - Santé des plantes, des animaux et des écosystèmes

Agence(s) de financement européenne(s) : European Regional Development Fund

Auteurs et affiliations

  • Marais Armelle, INRAE (FRA)
  • Umber Marie, INRAE (GLP)
  • Filloux Denis, CIRAD-BIOS-UMR BGPI (FRA)
  • Gomez Rose-Marie, INRAE (GLP)
  • Faure Chantal, INRAE (FRA)
  • Pavis Claudie, INRAE (GLP)
  • Julian Charlotte, CIRAD-BIOS-UMR BGPI (FRA)
  • Roumagnac Philippe, CIRAD-BIOS-UMR BGPI (FRA) ORCID: 0000-0001-5002-6039
  • Acina Manbole Isabelle Nina, INRAE (GLP)
  • Bonheur Lydiane, INRAE (GLP)
  • Theil Sébastien, INRAE (FRA)
  • Contreras Sandy, INRAE (FRA)
  • Candresse Thierry, INRAE (FRA)
  • Teycheney Pierre-Yves, CIRAD-BIOS-UMR AGAP (GLP) ORCID: 0000-0002-9754-0745

Source : Cirad-Agritrop (

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