نوع مقاله : مقاله کامل پژوهشی
نویسندگان
1 No. 1, Yaman (Tabnak) St., Chamran Highway
2 مرکز ویروس شناسی دانشکده کشاورزی دانشگاه شیراز
3 مرکز تحقیقات ویروس شناسی گیاهی، دانشکده کشاورزی، دانشگاه شیراز
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
Viral population diversity arises from genomic variations, mutations, recombination, and selective pressures, leading to the emergence of distinct viral strains and species. This study focuses on the evolutionary dynamics of potyviruses, particularly the Bermuda grass southern mosaic virus (BgSMV) and its relationship with maize dwarf mosaic virus (MDMV), both members of the genus Potyvirus. BgSMV, first identified in Iran, is closely related to MDMV but exhibits key differences, including a 90-nucleotide (NNT) fragment in the coat protein gene and distinct host, vector and temperature preferences. To elucidate the evolutionary mechanisms driving their divergence, we conducted complete genome sequencing, phylogenetic analysis, and recombination detection. Our results indicate that BgSMV and MDMV share a common ancestor but have diverged due to geographical isolation, host adaptation, and ecological factors. Recombination analysis revealed no evidence of genetic exchange between the two viruses, suggesting that their divergence is primarily driven by mutation, deletion, and selection. The study highlights the importance of ecological and host-vector interactions in viral evolution and provides insights into speciation mechanisms within the genus Potyvirus. These findings enhance our understanding of viral population dynamics and the factors influencing the emergence of new viral strains and species.
کلیدواژهها [English]
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