Eight isolates of Rhizoctonia solani Kuhn, the incitant of wet root rot of chickpea collected from Haryana, Rajasthan and Delhi, were assessed for pathogenicity and genetic variability using RAPD markers. Pathogenicity of these isolates varied both in sterilized and unsterilized soils when tested on chickpea variety C-235. Isolates differed in their RAPD banding pattern. The similarity value of RAPD profiles ranged from 0.12 (Hanumangarh - Karnal) to 0.79 (Delhi - Gurgaon and Hisar - Karnal) with an average of 0.34+/- 0.1 among the isolates. Ten random primers were used to fingerprint the individual isolates. The cluster analysis using un-weighted pair group method with arithmetic average distinguished R. solani isolates into different fingerprint groups.
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