Özet:

Türkiye has great variation and production experience in terms of both bread and durum wheat landraces and commercial varieties. The study was carried out to evaluate of agronomic and physiological components of durum wheat commercial cultivars and landraces under rainfed conditions. In the experiments, totally 35 durum wheat landraces and commercial varieties were investigated in the 2018-2019 cropping years in the Trakia region, Türkiye. The experiment was laid out in a randomized complete blocks design with three replications. The results of variance analysis showed significant differences (p<0.01) among local landraces and commercial varieties for the traits studied except for chlorophyll content. Normalised difference vegetation index (NDVI) was measured in heading stages. Landraces have the highest NDVI compared with commercial varieties. Higher canopy temperature was measured in commercial cultivars (G35, G32, G34 and G33) while lower canopy temperature was detected in landraces (G2, G15). Flag leaf area was measured at heading stages and it was found significant difference among landraces and commercial cultivars. Landraces G3, G4 and G2 had the highest flag leaf area of 42.9, 40.6 and 39.9 cm2, respectively. Landraces had longer plant height and peduncle length than commercial varieties. The number of grains per spike and number of stomata were higher in commercial varieties and local landraces, respectively. Stomata measurements were made on samples taken from flag leaves during the heading period. Commercial varieties had higher values than landraces in terms of stomata width, height, area and perimeter. Cluster analysis clearly differentiated, commercial cultivars from the landraces based on agro-physiological data

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