解读植物RNA病毒的混合感染,并重建同时存在于宿主体内的完整基因组
Martine Bangratz1, Aurore Comte1, Estelle Billard1
1PHIM, Plant Health Institute of Montpellier, Univ. Montpellier, IRD, CIRAD, INRAE, Institute Agro, Montpellier, France.
PloS one
|January 14, 2025
概括
研究人员开发了一种新方法来识别和测序单一植物内的多个米黄斑病毒 (RYMV) 菌株. 这一突破有助于理解病毒多样性和管理这种重要的米病原体.
科学领域:
- 植物病理学 植物病理学
- 病毒学 病毒学
- 基因组学就是基因组学.
背景情况:
- 快速演变的病原体的多个家族遗传系可以在全球共同循环.
- 单个宿主植物中的混合感染可以显著影响疾病的结果.
- 米黄斑病毒 (RYMV) 是非洲的特有病,对米生产构成重大威胁.
研究的目的:
- 为了识别不同的RYMV分离物同时感染一个单一的水植物.
- 为了测序这些共感染RYMV分离物的基因组.
- 开发和验证一种具有成本效益和便携性的分析混合病毒感染的方法.
主要方法:
- 结合直接cDNA牛津纳米孔技术 (ONT) 测序与RVhaplo生物信息学工具.
- 通过人工混合RYMV基因组的高相似性和不同比例验证了该方法.
- 将该方法应用于布基纳法索的现场样本,以分析自然混合感染.
主要成果:
- 成功重建了两个病毒基因组,其长度与人工混合物不同<2-3%.
- 在来自布基纳法索的单个大米植物样本中确定了多达三种不同的RYMV分离物.
- 获得了大多数已识别的RYMV分离物的完整基因组序列,使得多样性和重组分析成为可能.
结论:
- 开发的方法可以有效地识别和测序单一水植物中的多个RYMV单元类型.
- 这种方法提供了相对频率的粗略估计,并且具有成本效益和便携性.
- 该方法有可能在特有地区得到更广泛的应用,并研究其他影响全球作物的RNA病毒.
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