The genetic analysis of blast (Pyricularia grisea Sacc.) resistance in rice was conducted in Chhattisgarh, India. The inheritance studies revealed that, resistant parents RR 166-645 and Bala possessed a single dominant gene, which is effective against one or more races of blast. The resistant line RR 345-2 and moderately resistant lines IAC 25 and IR 42221-2-3-2 possesses two independent dominant genes, each gene providing resistance against a single but different race. Allelic tests showed that, the genes conferring resistance to blast present in RR 166-645 and RR 345-2 are non-allelic. Similarly, the resistance conferring genes in WAB 56-50 and B 61444-F-MR-6-0-0 are also non-allelic.