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Discovery of novel mycoviruses from fungi associated with mango leaf spots

文献类型： 外文期刊

作者： Wang, Qihua 1 ; Chen, Mengyi 2 ; Xie, Yanling 1 ;

作者机构： 1.Chinese Acad Trop Agr Sci, Key Lab Hainan Prov Postharvest Physiol & Technol, Minist Agr & Rural Affairs China, South Subtrop Crops Res Inst,Zhanjiang Key Lab Tro, Zhanjiang, Guangdong, Peoples R China

2.Huazhong Agr Univ, Coll Plant Sci & Technol, Key Lab Plant Pathol, Wuhan, Peoples R China

关键词： Mangifera indica; leaf spots; next-generation sequencing; mycovirus; viral diversity; viral evolution

期刊名称：FRONTIERS IN MICROBIOLOGY （ 影响因子：4.5； 五年影响因子：5.2 ）

ISSN：

年卷期： 2025 年 16 卷

页码：

收录情况： SCI

摘要： Mango (Mangifera indica) is a commercially significant fruit crop cultivated globally. However, leaf spot diseases are common in mango orchards, which severely impact the yield. Mycoviruses hold promise as potential biocontrol agents. To investigate this possibility, fungi were isolated from mango leaf spot lesions, resulting in the identification of six strains that contained double-stranded RNA (dsRNA). Through BLASTx analysis of the NCBI non-redundant database, 27 mycovirus-related contigs were identified, which corresponded to 10 distinct viruses grouped into 8 lineages: Alternaviridae, Chrysoviridae, Partitiviridae, Polymycoviridae, Orthototiviridae, Deltaflexiviridae, Narnaviridae, and Bunyaviricetes. Full genomic sequences of these viruses were characterized and confirmed to be associated with their host fungi. The findings included six novel mycoviruses, three previously unreported viruses discovered in new hosts, and one virus strain. These results highlight the diversity and taxonomy of mycoviruses found in fungi associated with mango leaf spots.

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