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Acta Horticulturae Sinica ›› 2025, Vol. 52 ›› Issue (2): 491-502.doi: 10.16420/j.issn.0513-353x.2024-0282

• Plant Protection • Previous Articles     Next Articles

Identification of Pepper Virus Diseases and Analysis of BWYV Genetic Variation in Dingxi Area of Gansu Province

YANG Wenqing, WANG Jiahui, XU Bingliang, LI Huixia, LIANG Qiaolan, YANG Shunyi*(), NIU Erbo*()   

  1. College of Plant Protection,Gansu Agricultural University,Anning,Gansu 730070,China
  • Received:2024-05-08 Revised:2024-11-07 Online:2025-02-25 Published:2025-02-23
  • Contact: YANG Shunyi, NIU Erbo

Abstract:

Using a method that combines high-throughput sequencing technology with RT-PCR,pathogen identification was conducted on pepper leaves infected with viral diseases in the Dingxi area of Gansu Province. The results indicated that the infected leaves were co-infected with cucumber mosaic virus and sugar beet western yellow virus. Notably,this study marks the first identification of BWYV infecting peppers in Gansu. Specific primers were employed to clone the coat protein and movement protein genes of BWYV,facilitating an in-depth analysis of the molecular evolution and genetic variation of this virus. Sequence comparisons revealed that the nucleotide and amino acid similarities between the coat protein(CP)gene of BWYV and isolates from other species ranged from 93.27% to 99.51% and from 90.10% to 99.01%,respectively. The similarities of the movement protein(MP) genes were found to be between 89.20% and 99.05% for nucleotides and between 86.86% and 98.86% for amino acids. Furthermore,phylogenetic analysis of BWYV demonstrated that different isolates could be categorized into four distinct groups. These groups exhibited no discernible geographical distribution characteristics,while host plant diversity analysis revealed significant correlations with host species.

Key words: pepper, beet western yellows virus, RT-PCR detection, evolutionary analysis