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Arch Virol. 2007;152(4):819-25. Epub 2007 Jan 3.

Molecular analysis of a full-length sequence of a new yam badnavirus from Dioscorea sansibarensis.

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  • 1Natural Resources Institute, The University of Greenwich at Medway, Chatham Maritime, UK.


Badnavirus-like particles were observed by ISEM in viral preparations from yam (Dioscorea sansibarensis) leaves from Benin. Use of the viral preparation as template for PCR amplification with badnavirus-specific primers gave rise to a 579-bp product with most nucleotide identity (70.8%) to Dioscorea alata bacilliform virus (DaBV, Accession numbers X94575-X94582), the only other yam badnavirus sequenced to date. A full-length badnavirus sequence was generated, which consisted of 7261 nucleotides with a typical Badnavirus genome organisation. The full-length sequence shared most identity (61.9%) to DaBV (Accession numbers X94575-X94582) and hence represents a member of a new badnavirus species termed Dioscorea sansibarensis bacilliform virus (DsBV).

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