An assessment of the presence of the genome marker linked to the Naxl gene, which regulates contents of Na ions in leaves under salinity, has been performed in 19 domestic varieties of Triticum durum. Using gwm312 and wmc170 molecular markers 200 bp allele linked to the Nax1 gene was detected in the Barakatli 95, Garabagh, Sharg, Shiraslan 23 and Gyrmyzy bugda varieties. Identified varieties may be promising for use in breeding.