Detection and Characterization of Tomato spotted wilt virus and Cucumber mosaic virus on Pepper Growing Areas in Antalya

The most efficient method to control the plant virus diseases is breeding resistant cultivars. However, the resistancecould be broken down after using resistant cultivars. This study was aimed to determine the prevalence and alsoserological and molecular characterization of Tomato spotted wilt virus (TSWV) and Cucumber mosaic virus (CMV)that cause infections, especially, in resistant pepper cultivars. For this reason, samples were collected from peppergrowing greenhouses and open fields during vegetation period of 2015 in different parts of Antalya province includingKumluca, Demre, Serik and Aksu districts. Out of 148 pepper samples collected, 53 (35.81%) were infected with TSWVand 11 (7.34%) with CMV as a result of Double-Antibody Sandwich Enzyme-Linked Immunosorbent Assay (DASELISA) test. Some regions on S RNA (nucleocapsid protein gene), M RNA (glycoprotein gene) and L RNA (RNAdependent RNA polymerase gene) of TSWV genome; RNA 1 (helicase/methyltransferase gene) and RNA 3 (coat proteingene) of CMV genome of DAS-ELISA positive samples were amplified by RT-PCR with specific primers. Nucleotidesimilarity rates of nucleocapsid protein gene, glycoprotein gene and RNA-dependent RNA polymerase gene regions ofTSWV isolate varied between 92-98% identity with other isolates in GenBank and CMV isolate varied between 89-96%.TSWV isolate showed nucleotide identity varied between 92-97% with Tsw resistance breaking isolates from Capsicumplants in Turkey, Italy and Spain. Genetic determinant for overcoming pepper Tsw resistance is located in S segment butaminoacid substitutions responsible for TSWV breakdown remain contradictory in several report

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