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Anastomosis Group and Pathogenicity of Rhizoctonia solani Associated with Stem Canker and Black Scurf of Potato in Heilongjiang Province of China

文献类型： 外文期刊

作者： Yang, Shuai 1 ; Min, Fanxiang 1 ; Wang, Wenzhong 1 ; Wei, Qi 1 ; Guo, Mei 1 ; Gao, Yunfei 1 ; Dong, Xuezhi 1 ; Lu, Dianqi 1 ;

作者机构： 1.Heilongjiang Acad Agr Sci, Virus Free Seedling Res Inst, Harbin 150086, Peoples R China

2.Heilongjiang Acad Agr Sci Postdoctoral Programme, Harbin 150001, Peoples R China

关键词： Anastomosis group;Pathogenicity;Rhizoctonia solani;Potato;Stemcanker;Black scurf

期刊名称：AMERICAN JOURNAL OF POTATO RESEARCH （ 影响因子：1.697； 五年影响因子：1.673 ）

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收录情况： SCI

摘要： From 2012 to 2015, a total of 226 isolates of Rhizoctonia solani were collected from the stem cankers on potato stems and sclerotia on tubers from different potato cultivation areas of Heilongjiang Province, China. These isolates were assigned to the anastomosis group (AG) by performing conventional PCR assays using previously published primers for ITS-rDNA regions, as well as by observing hyphal interactions where appropriate. Most of the isolates were assigned to AG-3PT (58.85 %), and several were assigned to AG-5 (21.68 %), AG-2-1 (7.08 %) and AG-4 (12.39 %). Pathogenicity tests showed that the AG-3 and AG-5 isolates had the highest virulence, and the disease indices were 1.96a and 2.47a for stem and 1.48a and 1.6a for root (P < 0.05) after analyzed by LSD multiple comparisons, respectively. Both two isolates consistently caused large brown lesions with sunken on the potato stems and roots in in vitro and greenhouse experiments. This is the first detailed report on the AG composition, variability and pathogenicity of R. solani isolates associated with stem cankers and black scurf found on potatoes cultivated in Heilongjiang Province.

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