Abstract
The experiment was carried out in one of the farms affiliated to the Department of Agricultural Extension / Ministry of Agriculture, in Muthanna Governorate / Warka District (25 km away from the governorate center), during the season (2021-2022) in order to study the effect of four planting dates (1, 10, 20, 30\\November) on yield components and qualitative traits of a number of genotypes (G1, G2, G3, G4, G5, G6, G7, G8, G9) and Aba265 (G10) of barley crop. The experiment was applied using the design of completely randomized sectors according to split method With three replications, as the dates filled the main panels and the structures in the secondary panels, the results of the experiment showed: Most of the genotypes outperformed in both yield components and qualitative traits, as genotype G7 outperformed in the trait of number of spikes with an average of (610.3) spike m-2, and genotype G9 outperformed in the number of grains per spike with an average of (43.92) grains of spike m-1, Aba265 (G10) was superior in the trait of weight of one thousand grains with an average of (47.06) g, and for the character of the protein content in the grains, the genotypes G6, G1, G8, and G10 excelled without a significant difference between them with averages of (13.342, 13.225, 13.037 and 12.950)% Sequentially, the G1 genotype was superior to the specific weight and without a significant difference from the genotypes G2, G8, G6 and G3, where their averages reached (63.52, 63.47, 62.82, 62.58 and 62.40) kg hectoliter-1 respectively. The dates (30,20,1/November) were superior in the number of spikes, which were not significantly different from each other, with averages of (509.1, 506.2 and 496.3) spikes m-2, respectively, while the dates (20/11, 10/11 and 1 /11) In the trait of the number of grains in the spike and without a significant difference between them, with averages of (41.91, 41.90 and 40.40) grains of a spike-1 sequentially. The specific weight exceeded the date (1/11) with an average of (62.68) kg hectoliter-1.
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