Full-length sequences of a bipartite begomovirus were obtained from a plant of Jatropha multifida in Florida showing symptoms of foliar mosaic, distortion and necrosis. Sequences of four clones each of a DNA-A and DNA-B were obtained, which showed very low sequence diversity among themselves. The clones were infectious when biolistically inoculated to J. multifida , Phaseolus vulgaris and Nicotiana tabacum , but not to J. curcas . The DNA-A sequences had less than 89 % pairwise identity scores with the DNA-A of other begomoviruses. The DNA-A appeared to be a recombinant in that 18 % of the DNA-A (470 nt) had a pairwise identity score of 91.98 % with RhRGMV, indicating that this portion most likely originated from a virus closely related to RhRGMV. The remaining 82 % of the DNA-A had lower identity scores with TbMoLCV (87.84 %) and RhRGMV (87.46 %), which suggests that this part of the component originated from an undescribed virus. There was no evidence for recombination in the DNA-B. Equivalent sequences of the DNA-A had the highest identity score (94.18 %) with a 533-nt sequence obtained from J. multifida from Puerto Rico in 2001 (GenBank accession no. AF058025). Pairwise comparison, recombination and phylogenetic analysis, and biology suggest that these clones are those of jatropha mosaic virus first reported from Puerto Rico. This is the first report of the complete genome sequence of jatropha mosaic virus.
Archives of Virology – Springer Journals
Published: Nov 1, 2014
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