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EXAMINING THE RESPONSE OF SOME PERSPECTIVE LINES BURLEY TOBACCO VARIETIES TO ECONOMICALLY IMPORTANT VIRAL PLANT DISEASES Yonko Yonchev, Yovko Djulgerski, Marina Drumeva – Yoncheva Tobacco and Tobacco Products Institute, 4108 Markovo, Plovdiv, Bulgaria e-mail: ionkogi@abv.bg
ABSTRACT The research was carried out during the period 2008–2010 on the experimental field s of Tobacco and tobacco products Institute – Markovo. Eight perspective Bulgarian Burley tobacco lines – 1354, 1478, 3199, 2131, 1435, 3149, 1409, 1421, with different degrees of resistance to viral diseases were included in the study. The line 1354 was used as a control genotype. All samples were tested on a naturally and an artificially infected background . The percentage of infection by Tomato spotted wilt virus (TSWV), Potato virus Y (PVY) and Tobacco mosaic virus (TMV) was calculated on the basis of symptoms observation. Immunological assessment of the lines reaction to TMV and PVY was made. The results of the research showed that none of the lines studied are resistant to TMV, PVY and TSWV, and thevarieties Burley tobacco are attacked to some extent by the viruses. Key words: tobacco, Burley tobacco lines, TSWV, TMV, PVY, naturally and artificially infected background, percentage of infection, viral diseases. |
