自肥新生植物病原体Phytophthora pseudosyringae的植物地理,起源和种群结构
Martin S Mullett1, Anna R Harris2, Bruno Scanu3
1Department of Forest Protection and Wildlife Management, Mendel University in Brno, Brno, Czech Republic.
Molecular plant pathology
|April 9, 2024
概括
影响木质植物的病原体Phytophthora pseudosyringae显示北美种群的欧洲起源,主要来自欧洲的持续迁移. 这项研究揭示了全球范围内的显著的交叉和独特的人口集群.
科学领域:
- 植物病理学 植物病理学
- 人口遗传学 人口遗传学
- 卵菌生物生物学 卵菌生物生物学
背景情况:
- 伪虫 (Phytophthora pseudosyringae) 是一个重要的病原体,影响着全球各种木质植物物种.
- 它表现出土壤和空中感染能力,在欧洲和北美造成损害.
- 了解其人口动态对于管理其传播和影响至关重要.
研究的目的:
- 调查全球人口结构,迁移模式,以及Phytophthora pseudosyringae的交叉.
- 确定病原体的不同地理群体的起源.
- 评估遗传混合的程度,并确定不同的种群群集.
主要方法:
- 基因型测序 (GBS) 用于在全球范围内收集分离物.
- 基于凝聚的迁移模型被用来推断历史和当代的基因流动.
- 进行了协会指数和网络分析,以评估交叉水平.
主要成果:
- 北美P. pseudosyringae种群起源于欧洲,具有历史上的双向基因流和主要是当代从欧洲迁移.
- 确定了两个主要的全球人口集群,在北美西部有一个明显的子群.
- 检测到显著的外交,导致主要集群之间的混杂个体,尽管比主要集群更少.
结论:
- Phytophthora pseudosyringae表现出复杂的人口结构和迁移动态,北美种群的明显欧洲起源.
- 证据表明,这种同质性菌体的外交程度比以前所认为的要高.
- 建议对不同人群群集群的生命史特征,毒性和宿主范围进行进一步的研究,以评估全球风险.
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