Odontoglossum ringspot virus (ORSV) is one of the most dangerous viruses decorative orchids. Infection caused by this can reduce phenotypic differences orchids in collections, and as a result lead to their total exhaustion. In study, possible origin Ukrainian isolate ORSV from collection O.V. Fomin Botanical Garden Taras Shevchenko National University Kyiv was investigated. The properties nucle...