Evaluate the drought tolerant of bread wheat genotypes based on drought resistance indicators
Journal Title: International Journal of Farming and Allied Sciences - Year 2013, Vol 2, Issue 22
Abstract
In order to evaluate the tolerance of bread wheat genotypes to drought stress, 9 genotypes were conducted in a randomized complete block design in three replications and two conditions drought stress and normal irrigation in the field of Islamic Azad University, Ardabil. Moisture regimens were applied in two ways: normal irrigation and terminal drought. Drought resistance and sensitivity to drought indicators was calculated to grain yield in two years. Results showed that there was significant difference between treatments in both normal irrigation and drought stress conditions at 1% level in the first year. But there was significant difference between treatments only in drought stress condition at 1% level in the second year. At first year, Saisons and Tous genotypes in normal conditions respectively with the means of 5.25 and 6.14 t per ha had the maximum performance than other genotypes. Genotypes Gascogne, 4061 and Sardari respectively the averages of 4.74, 4.54 and 4.13 t had the maximum performance than other genotypes in drought stress conditions. In the second year, Tous genotype with an average 3.93 t had the maximum performance than other genotypes in drought stress conditions. At first year, Tous and Sardari genotypes respectively with index STI, 0.95 and 0.88 and in the second year, genotypes of Sardari and 4061 with index STI and 1.17 were identified as tolerant genotypes. Also genotypes 4057 and Sardari were identified as tolerant genotypes in terms of tolerance index (TOL) that show the relative tolerance of genotypes. Saisons was identified as sensitive to drought genotype and in the second year, genotypes 4057, MV17/zrn, 4041 and Tous as tolerant genotypes and Gascogne were identified as sensitive to drought genotype.
Authors and Affiliations
Shohreh Pourmand, Reza Shahriary and Ali Akbar Imani
Keywords
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