The genome of African yam (Dioscorea cayenensis-rotundata complex) hosts endogenous sequences from four distinct badnavirus species

Umber Marie, Filloux Denis, Muller Emmanuelle, Laboureau Nathalie, Galzi Serge, Roumagnac Philippe, Iskra Caruana Marie-Line, Pavis Claudie, Teycheney Pierre-Yves, Seal Susan. 2014. The genome of African yam (Dioscorea cayenensis-rotundata complex) hosts endogenous sequences from four distinct badnavirus species. Molecular Plant Pathology, 15 (8) : pp. 790-801.

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Quartile : Q1, Sujet : PLANT SCIENCES

Abstract : Several endogenous viral elements (EVEs) have been identified in plant genomes, including endogenous pararetroviruses (EPRVs). Here, we report the first characterization of EPRV sequences in the genome of African yam of the Dioscorea cayenensis-rotundata complex. We propose that these sequences should be termed 'endogenous Dioscorea bacilliform viruses' (eDBVs). Molecular characterization of eDBVs shows that they constitute sequences originating from various parts of badnavirus genomes, resulting in a mosaic structure that is typical of most EPRVs characterized to date. Using complementary molecular approaches, we show that eDBVs belong to at least four distinct Badnavirus species, indicating multiple, independent, endogenization events. Phylogenetic analyses of eDBVs support and enrich the current taxonomy of yam badnaviruses and lead to the characterization of a new Badnavirus species in yam. The impact of eDBVs on diagnosis, yam germplasm conservation and movement, and breeding is discussed. (Résumé d'auteur)

Mots-clés Agrovoc : Dioscorea cayenensis, Dioscorea rotundata, Virus des végétaux, Séquence nucléotidique, Génie génétique, Biologie moléculaire, Phylogénie, Identification, Nomenclature, ADN, PCR

Mots-clés complémentaires : Badnavirus, Pararétrovirus, Endovirus

Classification Agris : F30 - Plant genetics and breeding
H20 - Plant diseases

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

Auteurs et affiliations

  • Umber Marie, INRA (GLP)
  • Filloux Denis, CIRAD-BIOS-UMR BGPI (FRA)
  • Muller Emmanuelle, CIRAD-BIOS-UMR BGPI (FRA)
  • Laboureau Nathalie, CIRAD-BIOS-UMR BGPI (FRA)
  • Galzi Serge, CIRAD-BIOS-UMR BGPI (FRA)
  • Roumagnac Philippe, CIRAD-BIOS-UMR BGPI (FRA) ORCID: 0000-0001-5002-6039
  • Iskra Caruana Marie-Line, CIRAD-BIOS-UMR BGPI (FRA) ORCID: 0000-0003-4486-2449
  • Pavis Claudie, INRA (GLP)
  • Teycheney Pierre-Yves, CIRAD-BIOS-UMR AGAP (GLP) ORCID: 0000-0002-9754-0745
  • Seal Susan, NRI (GBR)

Source : Cirad - Agritrop (

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