DETECTION SALT STRESS TOLERANCE OF SOME BARLEY GENOTYPES IRRIGATED WITH SEAWATER

Lyisometer experiments during two growing seasons 2020 and 202 1 were carried out on 15 barley genotypes, to assess the effectiveness of seawater irrigation on their response to salinity tolerance. Four concentrations of seawater were used (2.35 dSm(-1) as a control of irrigated water and three salinity levels 5.0, 10.0, and 15.0 dSm(-1)). There were significant effects of irrigation with saline water treatments on all studied traits. The studied barley genotypes showed statistically significant responses to salinity stress. Results showed significant effect of irrigation with different seawater on grain yield and its components. The high GCV and PCV were observed for number of grain spike(-1), number tillers m(-)(2) and grain yield under study. High estimates of heritability were observed for all traits under the salinity conditions, except 1000 grain weight was moderately under 10 dSm(-1). The salt selection indices were calculated based on grain yield. Results showed that MP, GMP and STI were more effective in identifying high yielding genotypes. under study and highest mean values for all studied traits under the treatments had detected by Giza 137, Giza 131, Giza 136 , Giza 123 line 2 and line5 .There were high genetic differences among barley genotypes response for different seawater levels, Giza 123, line 2, Giza 137, Giza 131, Giza 136 and line 5 found as tolerant genotypes under different irrigation by sea water levels which they will be a useful genotypes for their utilization in further barley breeding programs for detection of salt tolerance.