Abstract:

Zucchini yellow mosaic virus (ZYMV) is an economically important viral pathogen that causes intense mosaic symptoms and disfigurement in cucurbits. The aim of this study is to characterize ZYMV isolates obtained from Ankara, Antalya, Burdur, Konya, Karaman, Aksaray provinces of Turkey according to cylindrical inclusion (CI) protein sequences and to determine conserved areas on protein in Potyviruses. For this purpose, molecular studies and sequence analyzes were performed with primers specific to the CI protein region of collected cucurbit samples during 2019-2014 years. At the end of the study, the N terminus of Turkish ZYMV's CI protein 888 nucleotides long and 296 amino acids (aa) was amplified. Phylogenetic analysis of the nucleotide sequences of the CI region showed that the majority of isolates (40) belonged to a large molecular subgroup (A1) most common in Europe and the world, and three isolates (Y4, Y21, Y23) belonged to subgroup A5. Moreover, according to the coat protein nucleotide analysis, these three isolates (Y4, Y21, Y23) were grouped with the molecular subgroup A4, the group that emerged recently in Europe. The CI ZYMV nucleotide binding motif (NTBM) and RNA helicase activity site (five motifs) were conserved among isolates according to amino acid analysis.

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