Investigating tolerance to salt stress in some Iranian bread wheat cultivars

Salinity is an important environmental stress that is one of the main causes of productivity reduction in agricultural products, including wheat. Therefore, the purpose of this research is to investigate the tolerance to salinity stress in some Iranian bread wheat cultivars under greenhouse conditions. the number of 12 bread wheat genotypes (including Pishtaz, Karim, Backgrass Rasd, Chamran, Sardari, Pogari, Arg, Qaboos, Ohadi, Aflak, Kohdasht and Bam) are likely and sensitive to salinity in the form of a statistical design of complete randomized blocks with 3 Replications were investigated in the research station of Khorram Abad Faculty of Agriculture under the conditions of salinity stress and without stress in the crop year (2019-2020). The results indicated that with increasing salinity, yield and yield components decrease, and traits such as leaf sodium increase and electrolyte leakage increase. Also, there was a negative relationship between leaf sodium and chlorophyll content and reduction of internode length as well as yield and yield components. In general, in this research, all traits had a significant interaction, so the trend of traits was different from one treatment condition to another. This interaction doubled the complexity of interpreting the results. However, using statistical parameters of some characteristics of cultivars in increasing salinity treatments was fruitful for some traits and brought good results. In general, cultivars such as Bam, Kohdasht, Pishtaz, and Aflak were superior cultivars for yield and biological performance traits. These cultivars had positive characteristics in some other traits as well. Also, for the trait of electrolyte leakage, the same cultivars were in good condition and it indicated the tissue tolerance of these cultivars for sodium increase. Also, cultivars sensitive to salinity such as Ohadi, Sardari, and Backcrass were observe.

Investigating tolerance to salt stress in some Iranian bread wheat cultivars Keywords:

bread wheat , adaptability , stability , salinity