Akademik Veri Yönetim Sistemi
Journal of Tekirdag Agricultural Faculty, cilt.23, sa.1, ss.187-197, 2026 (ESCI, Scopus, TRDizin)
This research was carried out in the greenhouse of Bursa Uludağ University, Faculty of Agriculture in order to investigate the effects of gibberellic acid doses on seeds harvested at different ripening periods in some bread wheat varieties during the 2023-2024 growing season. The experiment was carried out in a three-factor randomized plot design with 3 replications. In the study, was applied Bezostaja-1 and Sönmez-2001 bread wheat varieties at 5 different harvest times according to the Zadoks scale (1. Harvest time: Zadoks 73, 2. Harvest time: Zadoks 75, 3. Harvest time: Zadoks 77, 4. Harvest time: Zadoks 83, 5. Harvest time: Zadoks 91) and gibberellic acid doses (100 ppm, 200 ppm). On the other hand, priming was not applied as a control. In the study, the harvest of the plants belonging to bread wheat varieties was waited for 1 month after the flowering time and the first harvest was started from the early milk maturity period and the ears were collected at 1-week intervals and the harvest was continued until the plants reached full maturity. The seeds belonging to the harvested ears were sorted by hand and kept at room temperature for 1 week, then dried in an oven (35 ˚C) for 72 hours and then stored at +4 ˚C. Before planting the seeds in pots, they were kept in gibberellic acid for 12 hours and then dried until they reached their initial weight. Then, the seeds were planted in pots in November. In the study, plant height, spike length, spikelet number, number of grains per spike, grain weight per spike, 1000-grain weight characteristics were examined. Significant differences were found at the 1% probability level between the harvest times and gibberellic acid doses of the varieties in the number of grains per spike, grain weight per spike, 1000-grain weight characteristics. The highest grain weight per spike was determined as 2.04 g in the application of 100 ppm gibberellic acid dose to the seeds of Sönmez-2001 variety obtained at the 4th harvest time and as 2.03 g in the control application to the seeds of Bezostaja-1 variety obtained at the 4th harvest time. In addition, for the 1000 grain weight trait, which is one of the factors affecting yield, the highest 1000 grain weight of 53.93 g was observed in the 100 ppm gibberellic acid dose applied to the seeds of the Bezostaja-1 variety at the 5th harvest time. It was observed that the 100 ppm gibberellic acid dose applied to the seeds harvested at the end of the dough maturity period increased the grain yield.