Research Information System
Applied Ecology And Environmental Research, vol.17, no.6, pp.14641-14651, 2019 (SCI-Expanded)
. 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+
, pvr21
, pvr22
, pvr23
alleles and
15 lines improved from CM334 carrying Pvr4, pvr23
and Perennial carrying pvr6 allele and QTLs. None
of the pvr alleles contribute to resistance to isolate 774 while pvr22 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.