Molecular diagnostics of potato infections with PVY and PLRV by immunochromatography

An immunochromatography test system has been developed for molecular diagnostics of the potato virus Y and PLRV infection. To increase a low yield of PLRV and raise antibodies against the PLRV antigen, chimerical virus was constructed comprising the PLRV coat protein and recombinant RNA of a tobamovirus, in which capsid protein gene was replaced by the PLRV coat protein gene. Binary vector containing the DNA copy of the recombinant RNA was infectious, and yield of the chimerical virus increased up to 800 times in comparison with the wild type PLRV. On the basis of experience in the development of the diagnostics of viral and viroid infections, rational tactics are proposed for the mass laboratory and field diagnosis of viral infections on the molecular level.