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园艺学报 ›› 2025, Vol. 52 ›› Issue (10): 2787-2798.doi: 10.16420/j.issn.0513-353x.2024-0797

• 植物保护 • 上一篇    下一篇

侵染芋的辣椒脉斑驳病毒的分子鉴定及遗传变异分析

陈越1,2,3,*, 郑雪1,*, 董坤4, 吴阔1, 肖祥丽5, 李妤1, 张洁1,**()   

  1. 1 云南省农业科学院生物技术与种质资源研究所,云南省农业生物技术重点实验室,农业农村部西南农业基因资源与种质创制重点实验室,昆明 650205
    2 云南师范大学生命科学学院,昆明 650500
    3 西南联合研究生院,昆明 650092
    4 云南省农业科学院富源魔芋研究所,云南富源 655500
    5 普洱学院生物与化学学院,云南普洱 665000
  • 收稿日期:2024-11-22 修回日期:2025-06-04 出版日期:2025-10-25 发布日期:2025-10-28
  • 通讯作者:
  • 作者简介:

    *共同第一作者

  • 基金资助:
    云南省“万人计划”青年拔尖人才专项(YNWR-QNBJ-2019-156)

Molecular Identification and Genetic Variation Analysis of Chilli Veinal Mottle Virus Infecting Taro

CHEN Yue1,2,3, ZHENG Xue1, DONG Kun4, WU Kuo1, XIAO Xiangli5, LI Yu1, ZHANG Jie1,**()   

  1. 1 Yunnan Province Key Laboratory of Agricultural Biotechnology,Key Lab of the Southwestern Crop Gene Resources and Germplasm Innovation,Ministry of Agriculture and Rural Affairs,Institute of Biotechnology and Germplasm Resources,Yunnan Academy of Agricultural Sciences,Kunming 650205,China
    2 School of Life Sciences,Yunnan Normal University,Kunming 650500,China
    3 Southwest United Graduate School,Kunming 650092,China
    4 Fuyuan Konjac Institute,Yunnan Academy of Agricultural Sciences,Qujing,Yunnan 655500,China
    5 School of Biological and Chemical Science,Pu’er University,Pu’er,Yunan 665000,China
  • Received:2024-11-22 Revised:2025-06-04 Published:2025-10-25 Online:2025-10-28

摘要:

为明确侵染云南芋[Colocasia esculenta(L.)Schott]样品的病毒病原种类,对采集自云南省富源县疑似病毒病症状的芋样品进行了病毒检测。利用菜豆金色花叶病毒属(Begomovirus马铃薯Y病毒属(Potyvirus)、正番茄斑萎病毒属(Orthotospovirus)和烟草花叶病毒属(Tobamovirus)等病毒属的通用引物及辣椒脉斑驳病毒(chilli veinal mottle virus,ChiVMV)的特异性引物对云南芋样品进行PCR及RT-PCR检测,通过克隆、测序获得云南芋ChiVMV分离物的CP基因序列,并结合GenBank中已公布的ChiVMV其他分离物的CP基因,利用生物信息软件对其进行遗传变异和种群遗传结构分析。结果显示,ChiVMV CP基因在进化过程中的保守性较高,本研究中获得的云南芋分离物与29个ChiVMV分离物CP基因核苷酸和氨基酸序列的一致性分别为85.13% ~ 99.65%和90.59% ~ 99.65%;系统发育分析与性状关联分析显示,ChiVMV的遗传分化与分离物的地理来源在一定程度上存在显著的相关性,而与寄主植物的种类无明显的相关性;遗传多样性和种群遗传结构分析表明,受到地理因素的影响,4个地理种群ChiVMV分离物均表现出较高的遗传多样性水平,遗传漂变和基因流是ChiVMV种群遗传变异的重要方式。本研究是ChiVMV自然侵染天南星科植物——芋的首次报道,研究结果丰富了ChiVMV的寄主范围及种群遗传信息,对监测ChiVMV在中国的扩散具有重要意义。

关键词: 芋, 辣椒脉斑驳病毒, CP基因, 遗传变异, 种群遗传结构

Abstract:

To clarify the types of viral pathogens infecting taro[Colocasia esculenta(L.)Schott] samples in Yunnan Province,virus testing was conducted on taro samples collected from Fuyuan County,Yunnan Province that exhibited suspected symptoms of viral disease. The research results provide a theoretical basis for virus screening and effective prevention and control of taro plants in the future. PCR and RT-PCR detection of Yunnan taro samples were conducted using universal primers for virus genera such as BegomovirusPotyvirusOrthosporovirus and Tobamovirus,as well as specific primers for chilli vein mottle virus. The CP gene sequence of the ChiVMV isolate from Yunnan taro was obtained through cloning and sequencing. By combined the CP genes of other ChiVMV isolates which were published in GenBank,genetic variation and population genetic structure analysis were conducted using bioinformatics software. The ChiVMV CP gene conservation high conservation during the evolutionary process. The identity of nucleotide and amino acid sequences of the CP gene between the Yunnan taro isolate obtained in this study and 29 ChiVMV isolates was 85.13%-99.65% and 90.59%-99.65%,respectively. Phylogenetic analysis and trait association analysis shows that there was a signification between the genetic differentiation of ChiVMV and the geographical origin of its isolates to a certain extent,but not significantly correlated with the species of host plants. Analysis of genetic diversity and population genetic structure indicates that,influenced by geographical factors,all four geographical populations of ChiVMV isolates display high levels of genetic diversity. Genetic drift and gene flow were significant means of genetic variation in ChiVMV populations. This study represents the first report on the natural invasion of ChiVMV into the Araceae plant,taro. The research results enrich the host range and population genetic information of ChiVMV,which is of great significance for monitoring the spread of ChiVMV in China.

Key words: Colocasia esculenta(L.)Schott, chilli veinal mottle virus, CP gene, genetic variation, population genetic structure