A single-stranded DNA (ssDNA) virus was detected in Yerba mate samples showing chlorotic linear patterns, chlorotic rings and vein yellowing. The full-genome sequences of six different isolates of this ssDNA circular virus were obtained, which share > 99% sequence identity with each other. The newly identified virus has been tentatively named as yerba mate-associated circular DNA virus (YMaCV). The 2707 nt-long viral genome has two and three open reading frame on its complementary and virion-sense strands, respectively. The coat protein is more similar to that of mastreviruses (44% identity), whereas the replication-associated protein of YMaCV is more similar (49% identity) to that encoded by a recently described, unclassified ssDNA virus isolated on trees in Brazil. This is the first report of a circular DNA virus associated with yerba mate. Its unique genome organization and phylogenetic relationships indicates that YMaCV represents a distinct evolutionary lineage within the ssDNA viruses and therefore this virus should be classified as a member of a new species within an unassigned genus or family.
Archives of Virology – Springer Journals
Published: Jun 6, 2018
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