Monitoring of Economically Important Virus Diseases in Virginia Tobacco Varieties
Keywords:
natural infection background; PVY; TMV; TSWV; Virginia tobaccoAbstract
The research was carried out during the period 2007 – 2008 on the experimental field of Tobacco and Tobacco Products Institute – Plovdiv. Three perspective Virginia tobacco lines – 0842, 0586 и 0543 and eight introduced varieties with different degrees of resistance to virus diseases (RG11, NC89, K 110, ОХ 207, V 276, K394, Н 4 and Н 5) were included in the study. The Bulgarian tobacco hybrid V 0514 was used as control genotype. All samples were tested on natural infection background. The percent of infection by Tomato spotted wilt virus (TSWV), Potato virus Y (PVY) and Tobacco mosaic virus (TMV) was calculated on the basis of symptom observation. The results of the study have shown that the varieties and lines were attacked by the virus to varying degrees. During the experimental period, the spread of TMV, PVY and TSWV depends more strongly to the varietal characteristics, while the influence of the factor year was less pronounced.
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