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Evaluation of Terminal Drought Stress Tolerance of Sesamum Indicum L. Genotypes under the Sistan Region Conditions

Journal Name:

  • International Journal of Science and Engineering Investigations

Publication Year:

  • 2013

Key Words:

Author NameUniversity of Author
Abstract (2. Language): 
In order to evaluate the yield, yield components and terminal drought stress tolerance, 16 genotypes of Sesamum indicum L. were examined in two separate experiments under non-stress and terminal drought stress conditions in a randomized complete blocks design (RCBD) with three replications. In non-stress conditions, irrigation was performed based on plant growth stages. Irrigation was discontinued since flowering stage by the end of growth season under terminal drought stress conditions. Comparative results of traits showed that genotypes had significant differences in terms of seed yield and yield components under stress and non-stress conditions. Comparative results of traits showed that the terminal drought stress reduced the number of capsules per plant, number of seeds per capsule and weight of 1000 seeds from 74 capsuls to 58 capsules, 40.65 seeds to 36.14 seeds and 3.28 g. to 2.66 g, respectively. TS-3 and Darab-14 genotypes had the highest seed yield, with values of 1141 kg/ha and 1115 kg/ha, respectively under non-stress conditions. In stress conditions, Darab-14 and Sistan genotypes had the highest seed yield with values of 856 kg/ha and 826 kg/ha, respectively. Darab-14 and Sistan genotypes had the highest seed yields in both non-stress and terminal drought stress conditions. According to the results, Darab-14 and Sistan genotypes can be used as drought-tolorant genetic basis in breeding programs due to the higher stability and yield than other genotypes under terminal drought stress conditions.
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  • 17
58-61
  • English

REFERENCES

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