Document Type : Research Paper
Authors
1
Ph. D. Student, Dept. of Agronomy and Plant Breeding, Faculty of Agriculture, Razi University, Kermanshah
2
Prof., Dept. of Agronomy and Plant Breeding, Faculty of Agriculture, Razi University, Kermanshah
3
Assist. Prof., Dry land Agricultural Research Sub-Institute, Sararood Station, Kermanshah
Abstract
To investigate drought tolerance indices and identify drought tolerant genotypes in durum wheat, 20 advanced durum wheat genotypes along with three checks, Zardak and Saji (durum wheat checks) and Sardari (bread wheat check) were assessed in a randomized complete block design with 3 replications under two rainfed and supplemental irrigation conditions in the Drayland Agricultural Research Sub-Institute (Sararood, Kermanshah, Iran) in 2010-11 cropping season. Drought tolerance indices i.e. mean productivity (MP), tolerance index (TOL), genomic mean productivity (GMP), harmonic mean (HAM), stress susceptibility index (SSI), stress tolerance index (STI), yield index (YI) and yield stability index (YSI) were calculated on the basis of grain yield in the both stress and non-stress conditions. The genotypes No. 2, 4, 8, 21 (Saji) and 18 with the highest values of MP, GMP, HAM and STI were found to be tolerant genotypes, while the genotypes 12, 21 (Zardak), 16 and 19 with the lowest values of TOL and SSI had the least susceptibility to drought stress. Biplot analysis indicated that the genotypes No. 8, 21 (Saji) and 18 were characterized by the indices of MP, GMP, HAM and STI as drought tolerant genotypes. The results of this research showed that in all of the genotypes, genotypes No. 8, 21 and 18 were tolerant genotypes.
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