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    THE EFFECTS OF WATER STRESS ON GRAIN YIELD AND YIELD COMPONENTS IN BREAD WHEAT
    (Academic Publishing House, 2024) Başer, Ismet; Akseki, Seher Semerci; Göçmen, Damla Balaban; Balkan, Alpay; Bilgin, Oguz
    The study was carried out with 24 wheat genotypes at different drought levels. The 24 genotypes used in the study were determined based on data from 45 genotypes at drought levels created with PEG. The experiment was carried out in plastic tubes 30 cm wide × 70 cm high. In the study, plant height, spike length, number of spikelets per spike, number of grains per spike, grain weight per spike, root length and root weight were investigated. When the plants were grown in tubes with 100%, 75%, 50%, and 25% field capacity, the highest values for all properties, except plant height, were obtained in plants with 100% field capacity. According to the data obtained, Bora, NKU Ergene, Enola and Rumeli were least affected by drought, while LG 59, Adelaide and Kavlıca genotypes were most affected by drought. Root length increased with drought and the longest roots were at 25% field capacity, which was the highest level of drought. The root weight was highest at 100% field capacity and lowest at 25% field capacity. Spike length, number of spikelets per spike, number of grains per spike, and grain weight per spike decreased significantly as the level of drought increased. © 2024 Academic Publishing House. All rights reserved.
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    Variability for Drought Stress Effects on Seedling Growth in Bread Wheat (Triticum aestivum L.) Genotypes
    (Bitki Islahçıları Alt Birliği, 2023) Başer, İsmet; Akseki, Seher Semerci; Göçmen, Damla Balaban; Bilgin, Oğuz; Balkan, Alpay
    The study was carried out under different drought/osmotic stresses (0.00 MPa-control, 0.25 MPa, 0.50 MPa, 0.75 MPa and 1.00 MPa applications) created by using PEG 6000 with 43 genotypes under laboratory, with 5 replications according to a split-plot experiment design. The genotypes constituted the main plots, and the drought/osmotic stress applications constituted the sub-plots. In the study, seedling weight, root number, root length, root weight, shoot length, and shoot weight characters were determined. It was determined that drought stress applications caused statistically significant decreases in root and shoot characters. Osmotic stress of, 1.00 MPa and 0.75 MPa caused statistically significant reductions in root and shoot characters. The results indicated that early and mid-early varieties were more tolerant to drought than the late varieties. Although Aglika, Anapo, Enola and Hamza varieties were outstanding for their root properties, while Maden, NKU Ergene and Bezostaja-1 cultivars showed more appropriate shoot characteristics than other cultivars. Enola, Aglika, Bezostaja-1, NKU Ergene, Anapo, Hamza and Maden bread wheat varieties showed better growth characteristics under drought stress conditions in the study.