Fertility restoration of wild abortive and kalinga cytoplasmic male sterility in rice (Oryzasativa L.)

Genetics of fertility restoration in four restorer lines viz., TOX 981-11-23, R1949-1196-2-1 and IR72164-352-2-5-5 were studied in “Wild Abortive” and Kalinga cytoplasmic male sterility system using cytoplasmic male sterile line, IR58025A and CRMS31A. Evaluation of fertility restoration in the plants of F₂ generation showed monogenic 3 fertile: 1 sterile segregation ratio and CRMS31Ax IR72164-352-2-5-5 showed a segregating ratio of 9 fertile: 7 sterile, indicating digenicinheritance with complementary gene action. It can be concluded that the presence of complementary genes and dominant monogenic gene in IR72164-352-2-5-5 restorer line govern fertility restoration in the both WA and Kalinga CMS system.