DETERMINATION OF YIELD AND SOME YIELD CHARACTERISTICS OF SOME WHEAT GENOTYPES UNDER LIMITED NITROGEN CONDITIONS

Wheat is an important food source worldwide and plays a strategic role in terms of food security and economy. In order to meet increasing food needs, it is important to develop regionally adapted, productive and high quality wheat varieties. Nitrogen is the main nutrient that directly affects wheat yield, but its overuse can cause yield loss. Timing and management of nitrogen application are decisive factors in increasing yield. Furthermore, the interaction between water availability and nitrogen plays a major role in wheat growth and yield. Integrated management of nitrogen and water can increase yields, while stress conditions such as drought can limit yields. Future research should develop strategies to improve nitrogen efficiency while considering environmental sustainability. A total of 7 genotypes including 4 local bread wheat genotypes, 2 durum wheat varieties, 1 local siyez wheat collected from the villages of the Southeastern Anatolia region, which is the homeland of wheat plant, were used. The experiment was established with four replications according to split plots experimental design at 4 nitrogen doses. Yield and yield characteristics were determined. Svevo and fırat93 were the most favourable genotypes in terms of most traits among the genotypes. Among the local genotypes, GYE4 and GYE3 had the highest values for breeding studies.