The present investigation was conducted during rabi 2000/01 in Punjab, India to assess the genetic potential of 24 maize inbred lines representing 2 contrasting pools, i.e. MS pool and Tux pool. Twelve inbred lines and 3 inbred testers from each pool were used to generate 72 F1 crosses in line x tester mating design by crossing 12 inbred lines of MS pool with the 3 Tux inbred testers and vice versa. Data were recorded for days to 50% silking, plant height, ear height, ear length, ear girth and grain yield per plant. Additive gene effects were found important for all traits except grain yield. Three lines from MS Pool (ML3, ML12, ML1) and 3 lines from Tux pool (TL1, TL2, TL10) were good combiners for earliness. Similarly, one tester from each pool (TT2 and MT1) were good combiners for earliness. Among females, ML5, ML1 and ML11 from MS pool and TL6, TL7, TL12 and TL11 from Tux pool were good combiners for grain yield. Among testers, the only good combiner was TT2. The hybrid TL7 x MT3 was identified to be significantly better than Paras, the best hybrid control.