Viral and Viroid Communities in Peach Cultivars Grown in Bulgaria
2025
Mariyana Gozmanova | Vesselin Baev | Rumyana Valkova | Elena Apostolova-Kuzova | Stoyanka Jurac | Galina Yahubyan | Lilyana Nacheva | Snezhana Milusheva
Peaches (<i>Prunus persica</i> L. Batsch) and nectarines (<i>Prunus persica</i> L. Batsch var. <i>nectarina</i> [Ait.] Maxim) are economically important stone fruits consumed worldwide, both fresh and processed. Viruses and viroids significantly constrain the cultivation and productivity of peach orchards. Climate change may alter vector populations and lead to shifts in agricultural practices, influencing the spread of these viruses and viroids. Additionally, market globalization further intensifies the pressure on peach crops by facilitating the movement of pathogens, increasing the incidence of virus-induced diseases. In this study, we identified the viral and viroid communities in five peach cultivars from Bulgaria and assessed their impact on symptom development. RNA sequencing of symptomatic leaf samples revealed the presence of common peach viruses, such as plum pox virus and prunus necrotic ringspot virus. Notably, we identified peach latent mosaic viroid and cherry green ring mottle virus in Bulgarian peach orchards for the first time. Furthermore, bioassays of indicator plants, ELISA, and Sanger sequencing were performed for each peach tree to complement the RNA sequencing data. These findings provide valuable insights into the composition of viral and viroid pathogens affecting peaches in Bulgaria and will support the development of targeted strategies for monitoring and managing these pathogens, contributing to the sustainable production of peaches in the region.
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