番茄斑点枯病毒 (Orthotospovirus tomatomaculae) 的进化起源和人口发展轨迹
José A Castillo1, Lenin Ramírez-Cando2
1School of Biological Sciences and Engineering, Yachay Tech University, Hcda San José y Proyecto Yachay, Imbabura, Yachay, 100115, Ecuador. jcastillo@yachaytech.edu.ec.
Archives of virology
|January 15, 2026
概括
番茄斑点枯病毒 (TSWV) 起源于公元1768年左右的韩国. 这种植物病原体后来在全球传播,人口扩张与农业和新的昆虫载体有关.
科学领域:
- * 病毒学 病毒学
- * 进化生物学 进化生物学
- * 植物动力学
背景情况:
- *番茄斑点枯病毒 (TSWV) 是影响各种作物的重要病原体.
- *了解TSWV的进化史,包括其起源,传播和人口结构模式,对于疾病管理至关重要.
- *以前的研究集中在TSWV的基因组和感染机制上,但它的进化动态需要更深入的研究.
研究的目的:
- * 确定番茄斑点枯病毒 (TSWV) 的祖先起源,分歧时间和地理分布.
- *重建人口历史并确定TSWV的关键扩张事件.
- *分析TSWV的不同基因组段 (L,M和S) 的进化动态.
主要方法:
- *贝叶斯系遗传学和系动力学分析对136个TSWV分离物的全基因组序列进行.
- *数据跨越了35年的采样窗口,对每个基因组段进行了单独的分析.
- * 用贝叶斯框架估计了突变速率,分歧时间和地理起源.
主要成果:
- *TSWV基因组段的突变率从1.678 × 10-4到2.444 × 10-4替代/地点/年不等.
- * 据估计,TSWV最可能的分歧时间是公元1768年左右.
- * 植物地理分析表明,韩国是原产地,随后分散到欧洲,北美和其他大陆.
- *确定了两个主要的TSWV种群扩张,与农业扩张和新的昆虫载体的出现有关.
结论:
- *TSWV可能起源于韩国,大约在18世纪中叶.
- *TSWV的全球传播受到农业实践和载体演变的强烈影响.
- *这些发现为这个经济上重要的植物病毒的进化轨迹提供了关键的见解.
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