1Hybrid Rice Section, Crop Improvement Division, Directorate of Rice Research, Rajendranagar, Hyderabad -500 030
2Department of Genetics and Plant Breeding, College of Agriculture, ANGRAU, Rajendranagar, Hyderabad - 500 030
One hundred and fifteen crosses from five CMS lines and 23 restorers along with parents were evaluated in line x testers 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 and PUSA 5A, IBL-57, SG 27–77, SG 26–120 and KMR-3 were good general combiners for grain yield and contributing traits. IRRI genotypes 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 showed good specific combining ability for grain yield and components.
CMS lines, combining ability, hybrid rice, Line x Tester
