Abstract

                                Sixty hybrids developed from crossing four CMS lines with 15 restorers were studied along with parents for 13 yield and yield attributing characters. Among the male parental lines, BR 827-35-3-1, RTN 3, IR 46 appeared the best general combiner for grain yield and most of the component characters. The female line IR 58025A was found to be good general combiner for all the traits except plant height and grain L: B ratio. The most promising specific cross combinations were IR 58025A X BR 827-35-3-1, IR 58025A X RTN 3 and IR 68885A X RTN 711 for grain yield/hill.

Key words : Rice, combining ability, gene action, line x tester