Evaluation of Promising Bread Wheat Genotypes under End-Season Drought Stress in Seed Yield and Its Components in Ardabil Region

شیرانی, محمد and فرزانه, سلیم and خماری, سعید and سیدشریفی, رئوف and قاسمی, معرفت Evaluation of Promising Bread Wheat Genotypes under End-Season Drought Stress in Seed Yield and Its Components in Ardabil Region. In: 2nd International and 6th National Iranian Congress on Organic vs. Conventional Agriculture, August 2019, Ardabil, Iran.

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Abstract

Drought is one of the most common climatic phenomena in nature, the most important factor limiting the growth and production of crops and less vegetation is completely avoided. Therefore, the purpose of this study was to investigate the effect of post-anthesis drought stress on the quantity and quality of wheat seed. This study was carried out at Ardabil Agricultural Research Station and Mohaghegh Ardebili University in 2018 under field and laboratory conditions. The experiment was conducted as factorial based on randomized complete block design with three replications. Drought stress (drought stress after pollination and non-stress), cultivar (including 8 cultivars and wheat line) were the experimental factors. The results showed that the differences between cultivars were not significant in terms of time to maturity, but drought stress after pollination reduced the growth period to about 10 days. Post-anthesis drought stress reduced the number of fertile spikelets and among the different cultivars and lines Mihan cultivar with 43.50 had the highest number of fertile spikelets. Gaspard / Tam200 / Alvd line with 30.40 fertile spikelet had the least number of fertile spikelet. In terms of plant height, Zareh with 85.50 cm and Gaspard / Tam200 / Alvd line with 85.66 cm had the highest plant height among different cultivars and lines. The highest grain yield belonged to Mihan cultivar and the highest biological yield belonged to Mihan cultivar and Gaspard / Tam200 / Alvd line.

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