International Science and Technology Journal

The field experiment was carried out in the Wardama region in the Green Mountain, Libya, during the 2019 season. The experiment included 13 genotypes introduced fromThe International Center for Agricultural Research in the Dry Areas) ICARDA and International Maize and Wheat Improvement Center (CIMMYT), in addition to some local genotypes for comparison. The treatments were planted according to a completely randomized block design (RCBD) with three replicates. Significant differences were observed between all genotypes and for all traits studied. The Humayra genotype was superior to the rest of the genotypes in plant height, spike length, grain yield, and biological weight, reaching (88.66 cm; 7.16 cm; 1.57 tons/ha, 17.07 tons/ha) respectively. The 2020-110 genotype also excelled in the trait The number of grains per ear was (50.00), and the D2020-72 genotype was superior in terms of the weight of a thousand grains, which was (63.35 g). The mare’s eye genotype was also superior to the rest of the genotypes in terms of harvest index, as it gave (20.37%). The results indicate that the values of the phenotypic coefficient of variation were close to the values of the coefficient of genetic variation for most of the studied traits, while the highest heritability percentage was for plant height, the number of grains per spike, and the weight of a thousand grains, amounting to (81.47 cm, 91.88, 77.81 g). Therefore, the genetic makeup can be extrapolated by taking phenotypic data, and such traits can be considered as selection evidence in improving this crop........... Keywords: ......Durum wheat – genotypes – Coefficient of variation – heritability percentage.