مجلة جامعة كركوك للعلوم الزراعية (Jul 2023)
Study of thermal aggregation of growth traits in the branching and elongation phases of a group of genotypes in Coarse wheat (Triticum durum Desf.)
Abstract
This study was conducted during the agricultural season 2021-2022 at the Agricultural Research and Experiment Station (Sayada area) belonging to the College of Agriculture at the University of Kirkuk, using a randomized complete block design (R.C.B.D) and with three replications, each block included twenty experimental units, the number of genotypes of durum wheat is ( DW38, Bejah-6/SLA, Halio, Mikki, Guayacan, Amedakul s, Fadda98, Icarasha 2, Sham 5, Lahnaucan, Sardar, Bagdad, DW10, Axad5, Simito, Crezo, Corvilla , Iraq Oasis, Surat Kul,Um Rabie), Where the results showed that there are significant differences between the genotypes at the probability level of 1% for the number of branches and the stage of elongation, and the existence of significant differences between the genotypes at the level of probability 1% for the studied traits, where the genetic structure of Sardar exceeded the trait (the number of total fragments, the number of effective fragments, the number of days for the number of branches, 50% spikes parcel) with the highest average, as their average reached (583.20 branches, 526.37 branches, 103.00 days, 16.73 branches, 116.66 days) And the highest average number of branches in the stage (Z21, Z23, Z24, Z25, Z26, Z27, Z28 and Z29) where their average was (1.20, 7.10, 8.46, 9.90, 12.43, 14.36, 15.60, 16.73) and the superiority of the two genetic structures Mikki and Crezo for the characteristic of the area of the flag leaf with the highest average, as their average reached (42.35, 42.18) respectively, while the composition um Rabie with the highest average average plant height, with an average of 83.82, and the genetic makeup of Corvella with the highest average chlorophyll content of the flag paper, with a peak of 47.28 The genetic structure Lahnaucan gives the highest average number of branches in the stage (Z22, Z23, Z24 and (Z25), where their average was (4.20, 7.40, 8.46, 9.60) and the genetic structure Fadda98 gave the highest average number of branches in the stage of Z24) and (Z25, where the average of they are (7.83, 9.70) and the genotype Bejah-6/SLA gives the highest average number of branches in the stage (Z29), where it averaged (16.00) and the superiority of the genetic structure Surat Kul in the elongation stage (for the first decade, the second decade, the third decade, the fourth decade and the fifth decade) The highest average in the number of days, which reached (80.00, 86.66, 92.66, 99.33 and 99.33) and the genetic structure Fadda98 in (the fourth and fifth decade), the highest average in the number of days, reaching (99.33), plants needed to enter the branching stage to the accumulated temperature of 379.0 m0, while plants of all genotypes entered the stage of the maximum number of branches requiring thermal collection of 707.0 m0, and thermal collection required to complete the elongation stage 635.5 m0.
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