اثر تنش خشکی بر عملکرد و اجزای عملکرد 20 رقم کنجد

In order to evaluate yield and its components and to determine the most important traits affecting the yield in sesame, 20 different sesame cultivars were assessed under both normal irrigation and drought stress in a randomized complete block design with three replications in the research farm of the University of Birjand at 2013.The studied genotypes were: Dashtestan 2 , Dashtestan 5, TS-3, Yellow white, Jiroft 13, Oltan, Darab1, Darab2, Darab 14, Safi Abad 1, Ferdows, Ahwaz, Iran , local of Sabzevar, Sirjan, PF3, Shooshtar, Fasa, Ardestan, Fars, Arak. Traits including grain yield, grain weight, number of branches, plant height, capsule length, capsule width, number of capsules per plant, biological and economicalyield, plant height from the ground to the first node with capsules. Analysis of variance showed that under stress conditions, the plant height, height to first node with capsule, number of branches, number of capsules, capsule length,capsule and seed width and biological yield were significantly different at the 1% significant level, however, grain yield was significant at 5% significant level.The means comparison analysis showed that under stress conditions, the Esfehan cultivar had the highest grain yield. According to the results of this experiment, the Esfehan
cultivar could be suggested as anelite cultivar among others under the stress conditions.