Study of Yield and its Components for Several Genotypes of Durum Wheat (Triticum Durum L.) Newly Derived Under Three Seeding Rate in the Conditions of Anbar Governorate
Abstract A field experiment was carried out in a farmer’s field in Zakhikha which is one of the rural areas of western Heet City (about 15 kg) in Anbar Governorate, during Winter season 2020-2021, with sandy loam soil, to study seven newly derived genotypes from durum wheat, including two cultivars. They are registered, certified, and commonly cultivated in Iraq, under three seeding rate to select the ones that are suitable for the conditions of Anbar Governorate. Randomized complete blocks design (RCBD) was used in a split plot arrangement with three replications. The experiment included three Seeding rate (140, 160 and 180 kg ha-1) that represented the main plot, whereas the sub plots were occupied by seven genotypes (Latifia, Babel-30, Babel-31, Babel-32, Babel-86, and the two approved varieties Dour-29 and Dour-85). The results of the study showed that Babel-32 outperformed the rest of significant effect genotypes with highest average number of spikes (507.6 spike m-2) and grain yield (8.741 Mg ha-1), while the genotype Babel-86 was superior in weight of 1000 grain (55.89 g), and the cultivar (Dour-29) outperformed for the trait of number of grains per spike (39.15 grains spike-1). A significant effect of plant densities appeared in the studied traits, as the plants grown at seeding rate (180 kg ha-1) recorded the highest average in the trait of number of spikes m-2 (506.2 spike m-2) and grain yield (8.898 Mg ha-1) And the percentage of protein (11.89%). While planting plants at seeding rates (140 kg ha-1) led to the highest rate of number of grains per spike (38.42 grains) and 1000 grains weight (52.71 g). There was a significant interaction between genotypes and Seeding rate.