湖南烟区烟草靶斑病的病原鉴定及融合群与致病力分析OA
Identification,anastomosis grouping and pathogenicity analyses of tobacco target spot pathogen in Hunan
为明确烟草靶斑病的病原种类、致病力以及烟草品种对靶斑病的抗性,分离培养了湖南烟区疑似烟草靶斑病发病烟叶中的病原菌,并对病原菌进行形态学和分子鉴定.同时采用玻片对峙法进行融合群分析,以病情指数为抗性评价指标测定了菌株的致病力,以平均病斑直径(AD)为抗感划分依据鉴定了11个主栽烟草品种的抗性.结果表明,分离得到的36株病原菌均为立枯丝核菌(Rhizoctonia solani),属R.solani AG3融合群.病原菌存在致病力分化现象,中等致病力为优势类群,不同地理来源的菌株致病力存在差异.11个主栽烟草品种均表现为高感烟草靶斑病,不同品种感病的烟叶病斑直径存在差异.
To clarify the species and pathogenicity of tobacco target spot pathogen and the resistance of tobacco cultivars to this disease,pathogens from tobacco leaves suspected of being infected with target spot in Hunan tobacco-growing areas were isolated and cultured,and morphological and molecular identifications were conducted.Meanwhile,the slide confrontation method was employed for anastomosis grouping analysis.The pathogenicity of strains was determined with disease index as the resistance evaluation index and the resistance and susceptibility of 11 tobacco cultivars were identified with average diameter(AD)of spots as the criterion.The results showed that all 36 isolated pathogens were Rhizoctonia solani AG3.Pathogenicity differentiation existed among the pathogens.Strains with intermediate pathogenicity were the dominant group,and strains from different geographical sources displayed varying pathogenicity.All 11 main tobacco cultivars showed high susceptibility to tobacco target spots,and there were differences in spot diameters among different infected cultivars.
林士洺;张正帆;袁伏才;唐前君;刘天波;肖钦之;马倩倩;张宇宇;李审微;黄琪;邓征宇;周观星;王灿
湖南农业大学植物保护学院,长沙市芙蓉区农大路1号 410128中国烟草总公司湖南省公司,长沙市天心区芙蓉南路一段628号 410004湖南省宁乡市双江口镇农业综合服务中心,湖南省宁乡市双江口镇新建街18号 410604湖南农业大学植物保护学院,长沙市芙蓉区农大路1号 410128中国烟草总公司湖南省公司,长沙市天心区芙蓉南路一段628号 410004中国烟草总公司湖南省公司,长沙市天心区芙蓉南路一段628号 410004湖南农业大学植物保护学院,长沙市芙蓉区农大路1号 410128中国烟草总公司湖南省公司,长沙市天心区芙蓉南路一段628号 410004中国烟草总公司湖南省公司,长沙市天心区芙蓉南路一段628号 410004中国烟草总公司湖南省公司,长沙市天心区芙蓉南路一段628号 410004中国烟草总公司湖南省公司,长沙市天心区芙蓉南路一段628号 410004中国烟草总公司湖南省公司,长沙市天心区芙蓉南路一段628号 410004中国烟草总公司湖南省公司,长沙市天心区芙蓉南路一段628号 410004
农业科技
烟草靶斑病立枯丝核菌融合群致病力抗性
Tobacco target spotRhizoctonia solaniAnastomosis groupPathogenicityResistance
《烟草科技》 2026 (2)
31-37,7
中国烟草总公司项目"基于智能精准测报的南岭烟区全程绿色防控模式构建与应用"[110202101050(LS-10)]、"南岭烟区稻烟融合绿色防控综合治理技术研究与应用"[110202201027(LS-11)]湖南烟草公司永州市公司科技项目"湘烟系列品种抗靶斑病定向改良技术研究"(YZKJ202316).
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