Host range and molecular variability of the sadwavirus dioscorea mosaic associated virus

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.