Aim.In current work, we proceeded with the strain attribution of Ukrainian isolates CMV based on the phylogenetic analysis of the partial sequences of the coat protein gene. Methods. ELISA, RT-PCR, DNA sequencing and phylogenetic analysis. Results. Cucumber mosaic virus (CMV) is widespread among the variety of crops from the Cucurbitaceae and Solanaceae families in Ukraine. The symptomatic samples from different regions of Ukraine were collected and tested for the presence of CMV. The coat protein (CP) gene of two isolates was amplifi ed and sequenced. The partial nucleotide sequences of CP gene were determined and compared to those of other CMV strains belonging to the IA, IB and II subgroups. Comparison of the nucleotide sequences of Ukrainian isolates showed their similar identity percentages and close relationships with the subgroup IB strains from other countries. The highest nucleotide homology was shared with the strains ABI (Korea) and SD (China). Conclusions. Based on the highest identities of the coat protein gene sequences and close phylogenetic relationships with the subgroup IB members of CMV, the Ukrainian isolates under study were identifi ed as belonging to the subgroup IB. Our fi ndings show for the fi rst time an occurrence of the IB subgroup isolates of CMV in Ukraine.
K e y w o r d s:Cucumber mosaic virus, coat protein gene, phylogenetic analysis.
Samples of plants showing symptoms of Turnip mosaic virus (TuMV) were collected from fields planted to Brassicaceae crops in Kyiv region and different locations in the city of Kyiv. TuMV was detected in the main brassica-crop fields, private gardens and urban locations of Ukraine, with a high overall incidence of 50%. This paper describes the effects of different cultivation approaches on the incidence rate of viral infection in susceptible crops and confirms the importance of preventive measures for disease control.
This paper describes detection of some typical plant viruses infecting Lycopersicon esculentum Mill. plants in Ukraine. Diagnostics using enzyme-linked immunosorbent assay (ELISA) confirmed presence of antigens of viruses belonging to Tobamovirus (PMMoV, ToMV), Cucumovirus (CMV) and Tobravirus (TRV) genera in sap of tomato plants. When studying viral diseases of tomatoes, monoinfection was shown to be prevalent. Tomato mosaic virus (ToMV) was most common.
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