烟草科技2026，Vol.59Issue(2)：31-37,7.DOI:10.16135/j.issn1002-0861.2025.0691
湖南烟区烟草靶斑病的病原鉴定及融合群与致病力分析
Identification,anastomosis grouping and pathogenicity analyses of tobacco target spot pathogen in Hunan
摘要
Abstract
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.关键词
烟草靶斑病/立枯丝核菌/融合群/致病力/抗性Key words
Tobacco target spot/Rhizoctonia solani/Anastomosis group/Pathogenicity/Resistance分类
农业科技引用本文复制引用
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..湖南烟区烟草靶斑病的病原鉴定及融合群与致病力分析[J].烟草科技,2026,59(2):31-37,7.基金项目
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)] （LS-10）
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). （YZKJ202316）
