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

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 and Seal, Susan E. ORCID: 0000-0002-3952-1562 (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. ISSN 1464-6722 (Print), 1364-3703 (Online) (doi:https://doi.org/10.1111/mpp.12137)

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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.

Item Type: Article
Additional Information: [1] Acknowledgement (funding): This work was supported by the European Regional Development Fund. [2] Molecular Plant Pathology is published in association with the British Society for Plant Pathology (BSPP).
Uncontrolled Keywords: badnavirus, Dioscorea cayenensis-rotundata complex, endogenous pararetrovirus, phylogeny, yam
Subjects: Q Science > QH Natural history
Q Science > QK Botany
Faculty / Department / Research Group: Faculty of Engineering & Science
Faculty of Engineering & Science > Natural Resources Institute
Faculty of Engineering & Science > Natural Resources Institute > Agriculture, Health & Environment Department
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Last Modified: 13 May 2019 14:32
Selected for GREAT 2016: GREAT b
Selected for GREAT 2017: None
Selected for GREAT 2018: None
Selected for GREAT 2019: GREAT 5
URI: http://gala.gre.ac.uk/id/eprint/12467

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