The effect of Post-pollination drought stress on quantity and quality of wheat seeds

شیرانی, محمد and فرزانه, سلیم and خماری, سعید and سیدشریفی, رئوف and قاسمی, معرفت The effect of Post-pollination drought stress on quantity and quality of wheat seeds. In: 2nd International and 6th National Iranian Congress on Organic vs. Conventional Agriculture, August 2019, Ardabil, Iran.

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Abstract

The purpose of this study was to investigate the effect of post-anthesis drought stress on the quality and quantity of wheat seed in 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. Results showed that post-anthesis drought stress reduced seed yield by 37.5%, while biological yield decreased by 12.7%. Therefore, post-anthesis drought stress affected grain yield more than biological yield. As a result, harvest index decreased significantly under drought stress after pollination. The highest grain yield belonged to Mihan cultivar and the highest biological yield belonged to Mihan cultivar and Gaspard / Tam200 / Alvd line. The results showed that the mean germination percentage in seeds obtained from non-stress and drought stress treatments after pollination was 96.08 and 91.25%, respectively. Seeds obtained from Haydari and Gaspard / Tam200 / Alvd cultivars were 96.66% and 96.33% higher than other cultivars, respectively. According to the results of comparison, the average germination rate in the seeds obtained after drought stress treatment was higher than the seeds under non-stress conditions.

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