Yuzvenko L. Biological physical and chemical properties of buckwheat burn virus

Dissertation is devoted to the study of properties of phytorhabdovirus -buckwheat burn virus (BBV), which is widespread in the basic regions of buckwheat growing in Ukraine, and with every year brings considerable losses of this valuable culture. The buckwheat burn virus behind morphological indicators belonges to family Rhabdoviridae. Virions of BBV have a bacillus-like form and dimensions 230 - 270 ? 75 - 90 nm. It contains single strand negative-sense RNA with molecular mass of 11575 nucleotides and structural proteins with molecular weights of 126, 66, 48, 45, 34 and 24 kDa. In the virion structure the fatty acids (palmitic, trans-oleic, cis-oleic, hydroxymyristinic and myristinic) and monosaccharides (mannose, arabinose, ribose, xylose, rhamnose and galactosamine) have been identified. BBV is transmitted by mechanical means, and affect a wide range of plants from 10 families, among which are agricultural crops of major importance to Ukraine from Solanaceae, Polygonaceae, Legominosae, Cucurbitacee. The estimation of stability of the world collection of a 121 sort of buckwheat of Fagopyrum esculentum Moench to BBV has been conducted. Sorts are distinguished, most steady to the viral infection, that gives an opportunity to use the most valuable sorts in a selection. The estimation of stability of Fagopyrum tataricum Gaertn collection of different ecological origin of phylogenetic close genus to the amazed plants of BBV.