Abstract
Banana bunchy top virus (BBTV) is a single-stranded circular DNA virus of the genus Babuvirus, belonging to family Nanoviridae. The six genomic DNA components of Indian (Lucknow) isolate of BBTV were amplified by polymerase chain reaction (PCR) with specific primers using total DNA extracted from banana tissues showing typical symptoms of banana bunchy top disease (BBTD). The resulting ~1.1 Kb amplicons were cloned and sequenced. Analysis of sequence data revealed the presence of six full-length components of BBTV: DNA-R (1111 bp), DNA-U3 (1060 bp), DNA-S (1075 bp), DNA-M (1048 bp), DNA-C (1018 bp), and DNA-N (1096 bp). Comparisons of sequence data of the six DNA components of the BBTV Lucknow isolate revealed highest identities with sequences of other BBTV isolates from the South Pacific group: [DNA-R (98%), DNA-U3 (93%), DNA-S (100%), DNA-M (98%), DNA-C (97%), and DNA-N (99%)]. A phylogenetic analysis revealed a close relationship of the Lucknow isolate with BBTV isolates of South Pacific group rather than those of the Asian group. Based on these analyses the virus has been classified as BBTV Lucknow, a new member of South Pacific group.
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We thank the Director, National Botanical Research Institute, Lucknow for providing facilities and keen interest, and the University Grant Commission (UGC), New Delhi for providing fellowship to one of the authors namely R. Vishnoi.
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Vishnoi, R., Raj, S.K. & Prasad, V. Molecular characterization of an Indian isolate of Banana bunchy top virus based on six genomic DNA components. Virus Genes 38, 334–344 (2009). https://doi.org/10.1007/s11262-009-0331-8
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DOI: https://doi.org/10.1007/s11262-009-0331-8