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<p>Mulberry (<i>Morus</i> spp.), an economically important tree in China, is susceptible to systemic viral infections. High-throughput sequencing (HTS) of mosaic-symptomatic leaves, combined with RT-PCR and RACE, yielded the complete genome (8,707 nt) of virus. BLASTN analysis showed 70.3% identity with citrus leaf blotch virus-2 (CLBV-2) at the genome level, and the virus was tentatively classified as mulberry leaf blotch virus (MLBV) within the genus <i>Citrivirus</i>. Phylogenetic analysis clustered MLBV with CLBV-2, while divergence in the 5′ and 3′ UTRs suggests lineage-specific variation. Together, these findings suggest that MLBV represents a distinct <i>Citrivirus</i> species infecting mulberry.</p>

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Molecular identification of a novel virus of the genus Citrivirus from mulberry trees

  • 期刊论文

  • 发表日期：

    2026年2月26日

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  • Litao Meng,
  • Zhiyou Xuan,
  • Song Zhang,
  • Xinying Yang,
  • Xiaofei Liang,
  • Haodong Yu,
  • Xuedong Liu,
  • Mengji Cao

摘要

Mulberry (Morus spp.), an economically important tree in China, is susceptible to systemic viral infections. High-throughput sequencing (HTS) of mosaic-symptomatic leaves, combined with RT-PCR and RACE, yielded the complete genome (8,707 nt) of virus. BLASTN analysis showed 70.3% identity with citrus leaf blotch virus-2 (CLBV-2) at the genome level, and the virus was tentatively classified as mulberry leaf blotch virus (MLBV) within the genus Citrivirus. Phylogenetic analysis clustered MLBV with CLBV-2, while divergence in the 5′ and 3′ UTRs suggests lineage-specific variation. Together, these findings suggest that MLBV represents a distinct Citrivirus species infecting mulberry.