【摘要】 综合分析甘薯茎线虫病的危害及病原侵入途径，探讨甘薯品种对该病的抗病性表现、抗性类型与机制。分析表明，不同品种的抗病性存在显著差异，主要表现为抗侵入和抗扩展两种类型，其机制涉及组织结构、生理生化及分子层面的多层次防御反应，其中茉莉酸信号通路激活与次生代谢产物合成发挥关键作用。遗传分析表明抗性受多基因控制，分子研究已鉴定出包括IbPIF1、IbMVD在内的多个抗性相关基因及分子标记。结合河北省甘薯种植区的生态条件与病害发生现状，提出加强抗病品种选育与合理布局、并配合农业与生物防治的综合策略，以期为河北省及我国北方甘薯主产区的病害可持续控制与抗病育种工作提供参考。更多还原

【Abstract】 Based on the comprehensive analysis of the damage caused by sweet potato stem nematode disease and the invasion pathway of Ditylenchus destructor Thorne, this study focuses on exploring the disease resistance performance, resistance types, and mechanisms of sweet potato varieties against this disease.The analysis indicates that different varieties exhibit significant differences in resistance, primarily manifested as resistance to invasion and resistance to extension.The underlying mechanisms involve multi-level defense responses at the organizational, physiological, biochemical, and molecular levels, with the activation of the jasmonic acid signaling pathway and the synthesis of secondary metabolites playing key roles.Genetic analysis reveals that the resistance is controlled by multiple genes.Molecular studies have identified several resistance-related genes, including IbPIF1 and IbMVD,as well as molecular markers.In light of the ecological conditions of sweet potato cultivation areas in Hebei Province and the current disease occurrence situation, this study proposes a comprehensive strategy that emphasizes the selection and rational distribution of resistant varieties, combined with agricultural and biological control measures.The aim is to provide insights for the sustainable management of the disease and resistance breeding in sweet potato production areas in Hebei Province and northern China.更多还原