Host range and molecular variability of the sadwavirus dioscorea mosaic associated virus
2022
Umber, Marie | Filloux, Denis | Svanella-Dumas, Laurence | Bonheur, Lydiane | Acina Manbole, Isabelle Nina | Gomez, Rose-Marie | Faure, Chantal | Anzala, Fabiola | Pavis, Claudie | Roumagnac, Philippe | Marais, Armelle | Theil, Sébastien | Candresse, Thierry | Teycheney, Pierre-Yves
Dioscorea mosaic associated virus (DMaV) is a member of the genus Sadwavirus, family Secoviridae, that is associated with mosaic symptoms in Dioscorea rotundata in Brazil. The genome of a DMaV isolate detected in D. trifida in Guadeloupe was sequenced by high-throughput sequencing. Using an RT-PCR-based detection assay, we found that DMaV infects D. alata, D. bulbifera, D. cayenensis-rotundata, D. esculenta, and D. trifida accessions conserved in Guadeloupe and Côte d'Ivoire and displays a very high level of molecular diversity in a relatively small region of the genome targeted by the assay. We also provide evidence that DMaV is also present in D. rotundata in Benin and in D. alata in Nigeria.
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