| Popis: |
Lake Sinai virus (LSV) is one of more than twenty honeybee viruses. There are officially two species: LSV 1 and LSV 2. However, there is currently a limited number of whole-genome sequences and the genetic variability of the virus indicates more than two species exist. Extracted nucleic acid of honeybee samples were screened by PCR for presence of the selected honeybee viruses. LSV was the third most abundant virus (36.9% of positive samples) after Apis mellifera filamentous virus (72.2%) and Deformed wing virus (52.5%). LSV-positive samples underwent additional PCR reaction with primers targeting region coding RNA-dependent RNA polymerase of the virus. The PCR products were sequenced and the acquired sequences used for first phylogenetic analysis. Based on the results, several of the isolates were selected to undergo whole-genome sequencing and the sequences obtained were used for additional phylogenetic analyses and construction of dendrograms. The results indicate presence of at least three genetically distinct groups of LSV in the Czech Republic, the major one being related to LSV 2, but too distinct to be considered LSV 2 species. Two sequences of major Czech LSV cluster of strains were successfully acquired, thus being the first Czech LSV strains published to date. |
