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Molecular characterization of Alternaria alternata causing fruit rot of chilli through RAPD marker

Molecular variation in chilli fruit rot pathogen (Alternata alternata) was analyzed by using six isolates collected from major chilli growing region of Maharashtra. The genomic DNA extracted from each isolate of A. alternata was subjected to polymerase chain reaction using 15 primers of OPA and OPB series off which 10 primers produced 83 scorable bands with size ranging from Among the RAPD primer 83 bands 80 bands were polymorphic and level of polymorphism was 96.38%. Molecular diversity using RAPD marker showed that the Aa2 (Satara) having higher similarity index with Aa4 (Akola). Dendrogram generated by pooled molecular data of 10 RAPD primers formed two clusters namely ‘A’ and ‘B’.cluster A include Aa1 and cluster B include Aa2, Aa4, Aa3, Aa5 and Aa6. | Molecular characterization of Alternaria alternata causing fruit rot of chilli through RAPD marker