Evidence for multiple intraspecific recombinants in natural populations of Watermelon mosaic virus (WMV, Potyvirus)
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The full-length sequences of 13 isolates of Watermelon mosaic virus (WMV, genus Potyvirus) belonging to the three main molecular groups defined at the capsid level were obtained and compared to 4 sequences available in databases. Many isolates presented evidence for intraspecific recombination, particularly between molecular groups 1 and 2. Most isolates had different recombination breakpoints suggestive of multiple independent recombination events. The breakpoints were for the most part located between the C-terminal half of the HC-Pro coding region and the N-terminal part of the CI coding region. There was no evidence for positive selection in the WMV genome.
KeywordsSoybean Mosaic Virus Recombination Breakpoint Complete Spatial Randomness Bean Common Mosaic Virus Watermelon Mosaic Virus
We thank Dr. J. Chadoeuf for his help in the permutation tests, and Dr. B. Moury for critical review of the manuscript.
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