Maize (Zea mays L.) is one of the most important cereals in the world due to its vast grown area, total production and cash value. It is essential for human consumption and livestock. Moreover, it is also used for industrial purposes such as manufacturing starch and cooking oils. The ultimate goal of most breeding programs is the production of improved hybrids for commercial use through the evaluation of line genotypes for high yielding ability. Evaluating inbred lines is of prime importance for hybrid production. Therefore, nature and number of tester parents to be used for evaluating inbred lines is still an important step. The top crosses test with abroad and narrow base testers is the most common procedure for the evaluating process. The top cross method of maize breeding has been used to evaluate inbred lines for general combining ability (GCA) and specific combining ability (SCA).