Determination of Drought Tolerance Indices as Selection Criteria of Rice Genotypes under Water Deficit Conditions in Egypt

The development of rice genotypes with impressive tolerance to abiotic stress is one the primary objectives breeding programs. current study was carried out assess capability different indices identify that are drought-tolerant under Egyptian conditions during two growing seasons 2018 and 2019. Thirteen drought were calculated using grain yield twenty genotypes. According combined analysis variance for yield, there highly significant differences between (G), irrigation regimes (I), their interactions. All indices, as well yields non-stress (Yp Ys), exhibited variations among For Yp, Ys, all assessed, estimates broad sense heritability (h2) genetic advance a percentage mean (GAM%) high. Using performances, multivariate analysis, Giza 179, Sakha 104, IET 1444, GZ 6296-12-1-2-1 superior both conditions, 107, IRAT 170, IR 68552-55-3-2, WAB 56-104, IRGA 318-11-6-2-6, NERICA -4 conditions. Hence, it suggested they can be utilized parents in hybridization programs aim improve other Egypt. Furthermore, productivity index (MP), geometric (GMP), (STI), harmonic (HM), (YI) classified better predictors considering potentials