Nine yellow maize inbred lines derived from S₅ generation at Mallawy Agricultural Research Station were topcrossed with three testers, i.e., commercial inbred lines Gm1002, and Gm1021 as well as single cross 166 in 2008 season. The 27 top-crosses with three commercial hybrids SC162, SC166 and TWC352 were evaluated at Sakha, and Mallawy Research Stations during summer 2009. Number of days to 50% silking, plant height (cm), ear height (cm), ear length (cm), ear diameter (cm), number of rows ear^-1, number of kernels per row^-1, number of ears 100 plants^-1 and grain yield (ard fad^-1) were studied.