由丁香假单胞杆菌猕猴桃致病变种引起猕猴桃细菌性溃疡病已经严重威胁世界猕猴桃产业的发展。利用猕猴桃属丰富的种质资源和溃疡病抗性差异，研究猕猴桃溃疡病抗性遗传规律及抗病基因已成为猕猴桃科研的重要方向。本项目拟开展同园感染实验和溃疡病强致病株接种实验，系统评估猕猴桃属主要物种和品种的溃疡病抗性；通过构建猕猴桃种间和种内抗性分化群体，测定杂交子代溃疡病抗性并评估抗性与果实性状相关性，获得猕猴桃溃疡病抗性遗传规律；最终，整合猕猴桃基因组和溃疡病抗性数据，采用关联分析发掘可能的抗性基因，应用于溃疡病抗性机理解析和抗性育种辅助选择。本项目的开展将为猕猴桃溃疡病抗性育种提供理论和实践基础，为猕猴桃产业的健康持续发展提供科技支撑。

Kiwifruit bacterial canker, caused by Pseudomonas syringae pv. actinidiae (Psa), has posed a serious threat to the global kiwifruit industry. Based on abundant Actinidia (kiwifruit) resources being significantly different in the Psa resistance, the inheritance of Psa resistance and discovery of resistance gene is deem to the top priority of kiwifruit study. In this study, the resistance in most of the Actinidia species and varieties will be systematically evaluated by the pathogen infection in field and Psa-V inoculation in lab, respectively. Subsequently, the resistance and fruit characters of progenies driving from inter- and intraspecific crosses will be determined and analysed, to study the inheritance of resistance and correlations with fruit characters. Finally, association study between the Psa-resistance and genomic data in Actinidia species, varieties and hybrid populations will be carried out for exploration and annotation of the resistance genes to Psa. The results will provide the theoretical and practical basis for the resistance breeding of kiwifruit bacterial canker, and further facilitate the sustainable and healthy development of kiwifruit industry.