Determination of the promising advanced lines of durum wheat (Triticumturgidum L. ssp. durum) with high-yielding capacity for the production of durum wheat in the thrace region

The study was carried out in 4 different locations (Tekirdağ, Hayrabolu, Kırklareli-Lüleburgaz, Edirne) in the Thrace Region with a total of 15 durum wheat genotypes, including 5 varieties and 10 advanced lines developed by Tekirdağ Namık Kemal University, Faculty of Agriculture, Department of Field Crops according to the randomized block design in the 2019-2020 year. In this study, grain yield and yield components such as plant height, spike length, number of spikelets per spike, number of grains per spike, grain weight per spike, number of grains of spikelets, spike fertility index, harvest index and thousand grain weight were examined, is aimed to identify candidates for registration with high yield potential or those with gene source potential for the Thrace Region and the durum wheat production areas of our country. According to the analysis of variance conducted in the study, the differences between genotype and location averages for all traits and the genotype x location interaction averages were found to be statistically significant at the 0.01 probability level. The averages of the durum wheat genotypes ranged between 75.5 and 91.4 cm for plant height, between 8.23 and 6.30 cm for spike length, between 15.53 and 22.03 units for the number of spikelets per spike, between 32,6 and 48,3 units for the number of grains per spike, between 2,200 g and 1,558 g for grain weight per spike, between 2.38 and 1.72 unit for spikelet grain number, between 54,26-75,12 grain g-1 for spike fertility index, between 42.33% to 46.99% for harvest index and 49.3 g to 40.8 g for thousand grain weight, and between 613,5 and 456,8 kg da-1 for grain yield in the study. Compared to the average of standard varieties, advanced lines have 1.4% shorter plant height, 1.52% longer spike length, 1.04% more number of spikelets per spike, 6.38% more number of grains per spike, 31% more grain weight per spike, 4.26% more spikelet grain number, 4.42% higher spike fertility index, 0.04% higher harvest index, 1.77% higher thousand grain weight and 4.09% higher grain yield average. As a result, considering the general evaluation, it has been determined that NZFM 41 is the forward line with the highest performance for the Thrace region for the character. In addition to this forward line, it has been concluded that other lines need to be emphasized especially for the region and our country's durum wheat production areas, including lines numbered NZFM 8, NZFM 22, NZFM 37, NZFM 39 and NZFM 40. Keywords: Durum Wheat, Line, Variety, Grain Yield, Yield Components