Abstract

                                One hundred and fifteen crosses from five CMS lines and 23 restorers along with parents were evaluated in line x tester design for grain yield and yield components in rice. Predominance of non additive gene action was observed for all the characters, suggesting the development of hybrids in rice. The lines APMS 6A and PUSA 5A, while IBL-57, SG 27-77, SG 26-120 and KMR- 3 were good general combiners for grain yield and attributing traits. The IRRI genotypes viz., IR 43, IR 55 and IR 60 were good general combiners for dwarf plant type. The hybrid combinations IR 79156A x IBL-57 , APMS 6A x GQ-25, APMS 6A x 517, IR 58025A x GQ-70, APMS 6A x SG26-120 and PUSA 5A x IR55 were good specific combiners for grain yield and associated components.

Key words : CMS lines, combining ability, hybrid rice, Line x Tester