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Tobacco etch virus (TEV) belonging to Potyviridae is among the most destructive viruses and widespread Worldwide but it has been found only Turkey in Mediterranean Basin. Both dominant and recessive pvr alleles contribute resistance against potyviruses. Prevalence of TEV in main pepper cultivation areas in Turkey and phylogenetic diversity of the isolates based on their coat protein region were determined in this study. Transferring resistance genes both recessive and dominant to susceptible chilli pepper lines was aimed with a breeding program including CM334 and Perennial known as resistance sources against several potyviruses. Two geographically and genetically distinct TEV isolates 1002 and 774 were inoculated to pepper genotypes carrying Pvr4, pvr2, pvr2, pvr2, pvr2 alleles and 15 lines improved from CM334 carrying Pvr4, pvr2 and Perennial carrying pvr6 allele and QTLs. None of the pvr alleles contribute to resistance to isolate 774 while pvr2 provides resistance to isolate 1002. All the pepper cultivation areas are infected by TEV in Turkey mainly Aegean Region and the isolates found in Turkey are close to those from Chinese isolate. Polygenic resistance was transferred by breeding program to line 4 could resist to both Turkish isolates.

DISTRIBUTION AND GENETIC DIVERSITY OF TOBACCO ETCH VIRUS IN TURKEY AND RESISTANCE OF IMPROVED CAPSICUM LINES