الفهرس 
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Abstract
Finally, the results that : 1. The narrow genetic tester (Gm.1021) was useful two improve number of kernels/row, 100-kernel weight and grain yield traits, while the medium genetic tester (S.C.52) was useful to improve ear height and number of rows/ear. The wide genetic tester (Comp 21) was useful to improve plant height and ear height. 2.The inbred lines Gm.1 and Gm.4 exhibited significant superiority effects of general combining ability for grain yield therefore can be using to produce crosses higher yield. 3.The top crosses Gm.1 x Gm. 1021, Gm.3 x Gm. 1021, Gm.4 x Gm. 1021 and Gm.5 x Gm. 1021 can be using on commercial level to superiority higher grain yield and earliness.