Efficient Resistance to Potato Virus Y and Potato Virus V in Single and Mixed Infections in Tobacco Cultivars Expressing the Coat Protein Gene of Potato Virus Y^N Strain

ABSTRACT

Resistance to six PVY isolates and PVV in single and mixed (PVY+PVV) infection was examined in R₃ progeny plants of two commercial tobacco cultivars (Rila⁸⁹ and Nevrocop ₁₁₄₆) expressing the coat protein gene of PVYⁿ strain. Both cultivars are widely grown in Bulgaria and PVY control on these cultivars is very important for tobacco industry. The resistance to PVY and PVV in single and mix infections was effective in number of transgenic lines, both in greenhouse experiments and under natural conditions.