Evaluation of the Using of Rice Genotypes Response to Salinity Stress at Seedling Stage in Hydroponic Culture

In order to evaluate the interaction of rice genotypes to salinity stress, responses of16 rice genotypes were assessed to 4 salinity levels (0, 4, 8, 12, dS/m) through a splitplot experiment seedling stage in hydroponic culture. In this experiment characters suchas plant height, leaf area, root length stem length, dry weight of root and stem, dryweight of leaf and total biomass were measured. All the characters in reaction to salinityshowed significant. And correlation coefficient of seedling stage had all the characterspositive and significant differences. At seedling stage, total biomass proved to be thetrait of choice for assessing the tolerance among cultivars as well as treatments. Totalbiomass of the PSBRC88 variety was decreased about 42% compared to control.Whereas this decrease for Shafagh was 26%. Also Nemat A/19R had the most decreasecompared to control (81%). The decrease of stem dry weight of PSBRC88 variety at 12dS/m salt level was less than other varieties with comparison to control (about 23%).The most decrease in stem dry weight of was for IR60819R/IR58025A by 86% relativeto control. The decrease of leaf area in Gerdeh variety was less than other varieties withcomparison to control (about 61%).