ESTIMATION OF SOME GENETIC PARAMETERS OF SEVERAL RICE CULTIVARS UNDER THE INFLUENCE OF SALT STRESS

Abstract

A field experiment was carried out during the season 2020 at the second research station of the College of Agriculture, Al-Muthanna University to study Response of three rice cultivars (Anber-33, Jasmine and Pokkali) to salt stress ). The treatment -1 (three concentrations of irrigation water salinity: 3, 6, 9 ds m was superior in all the studied traits except for the with saline level 3 ds m-1 trait of the sterility percentage which recorded the lowest value of 17.57 %, was gave lowest value in all the -1 while the treatment with saline level 9 ds m studied traits except for the trait of the sterility percentage which recorded the largest value of 43.64 %. With regard to the interaction between cultivars and salinity had a significant effect on the traits, the combination of (Anber-33 × 3 ) gave the highest number of filled grains with 91.30 grains per Cluster -1 ds m and the lowest percentage of sterility 14.40%. The traits of grain yield/plant (g) (71.07 and 75.07), Weight of 1000 grain (g) (63.67 and 63.21), Biological yield (60.03 and 58.34), Productive tillers/plant (62.09 and 53.75), Flag leave area ) (34.83 and 26.53), Sterility percentage (%) (30.54 and 30.31) and 2 (cm Cluster length (cm) (22.73 and 20.57) have recorded high PCV and GCV whereas plant height (20.78 and 19.87) recorded moderate PCV and GCV. However, the traits viz., days to 50 per cent flowering (9.87 and 9.73) and Chlorophyll content (9.40 and 6.92) were recorded low PCV and GCV. Plant height (cm) (98.55), days to 50 per cent flowering (97.06), Sterility percentage (%) (69.07), number of grain per Cluster (92.90), Cluster length (88.10), Biological yield (76.51) and weight of 1000 grain (g) (73.12) were recorded higher heritability