Assessing the performance of hybrids developed using iso-cytoplasmic restorers and identification of promising combiners in rice

Iso-cytoplasmic restorers (ICRs) are valuable source of fertility restoration for three linerice hybrids derived from wild- abortive cytosterile (WA-CMS) lines. They carry a full complement of fertility restorer (Rf) genes and sterile cytoplasm. We have test-crossed a set of 25 ICRs with four WA-CMS lines namely, IR 79156A, IR 58025A, Pusa 6A and RTN 12A following a line x tester mating design. Significant estimates of general and specific...