This study was carried out during (bree successive seasons to identify superior inbred lines and to evaluste sonic top crosses in maize. Seven newly developed inbred ،means were crossed to each of ten testers giving a total of seventy top crosses. These top crosses were evaluated in t years, Data were recorded in grain yield/plant and other Important agronomic characters and were analyzed according to Kempthornc (1957). General combining ability (g.c.a.) variances wcre predominant for plant height, ear height. ear diameter and Number of rows/car Whereas, o2 s.c.a. appeared (o be more important in controlling grain yield/plant, ear length, number of grains/row, and silking date, Also, the interactions between s.c.a. x year were much higher than those between g.c.a. x year for all of the studied traits except for silking date. Inbred line M56 was the best combiner for grain yield/plant, car length, and number of grains/row Parental line M87 was a better combiner for short plant stature and earliness. The males D.C. Fatah and T.W.C. 320 were the best general combiner for grain yield/plant and some of its components, However, the male T.W.C. 310 expressed highly significant and negative gi effects for silking dale The best sca. effects for grain yield/plant were obtained in the crosses (T.WC 320 x M73), (G 303A x M 129), (D.C. 215 x M43), (D.C. 215 x M82) and (Cita 2 x M43). The top crosses (T.W.C 320 x M 71) and (S.C lo x M56) produced |
