Evaluating salt tolerance of bread wheat genotypes using stress tolerance indices

Gholizadeh, Amir; Dehghani, Hamid; Dvorak, Jan

Evaluating salt tolerance of bread wheat genotypes using stress tolerance indices

Document Type : Research Paper

Authors

¹ M. Sc. Student, Dept. of Plant Breeding, Faculty of Agriculture, Tarbiat Modares University

² Assoc. Prof., Dept. of Plant Breeding, Faculty of Agriculture, Tarbiat Modares University

³ Prof., Dept. of Plant Breeding, University of California

Abstract

To determine some of stability parameters related to grain yield in salinity condition, 41 bread wheat genotypes were evaluated under two non-stress and stress conditions in research field of the National Salinity Research Center (NSRC) in Yazd province. The salinity of irrigation water was 2 and 10 ds.m^-1 for normal and salt conditions, respectively. Result of analysis of variance showed significant differences between genotypes for grain yield and yield components in both normal and salt stress conditions. Roshan and Yazd local varieties with the average grain yield of 3791.25 and 3764.47 kg.ha^-1 respectively, had the highest grain yield in normal and salt stress conditions. Evaluating the correlation coefficients between indices and average grain yield in both experimental conditions showed that the three indices of mean productivity, geometric mean productivity and stress tolerance index were the best criteria for the selection of tolerant genotypes to salinity stress. Also, the three-dimensional diagrams derived from each index and grain yield in normal and salt stress conditions confirmed that the Roshan and Yazd local varieties had the highest grain yield in normal and salinity conditions and were the most tolerant genotypes to salinity stress.

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