First Report and Complete Genome Characterization of Cherry Virus A and Little Cherry Virus 1 from Russia.

Virus diseases affect the yield and fruit quality and shorten the productive life of stone fruits ( spp. in the family ). Of over fifty known viruses infecting these crops, cherry virus A (CVA) is among the most common, and little cherry virus 1 (LChV1) is one of the most economically important. Using high-throughput sequencing, full-length genomes of CVA and LChV1 isolates, found on interspecies hybrids in the collection of the Nikita Botanical Gardens, Russia, were sequenced, assembled, and characterized. CVA was found in the × hybrid and in phylogenetic analysis clustered with non-cherry virus isolates. The LChV1 isolate Stepnoe was detected in (( Ehrh. × L.) × Vill.) trihybrid suggesting that both and potentially can be the LChV1 hosts. The isolate Stepnoe was most closely related to the Greece isolate G15_3 from sweet cherry, sharing 77.3% identity at the nucleotide level. Possibly, the highly divergent Russian isolate represents one more phylogroup of this virus. This is the first report of CVA and LChV1 from Russia, expanding the information on their geographical distribution and genetic diversity.