Fifty S₁, S₂ and S₃ white maize lines were extracted and developed from five open different populations for searching of new maize inbreds that tolerate drought accompanied with distinct performance as heterotic groups. These lines were evaluated along to ten drought tolerant inbred lines of Maize Section (ARC) under field conditions of normal and stress watering regimes during 2017, 2018 and 2019 seasons, respectively. Anthesis-silking interval (ASI), 100-Kernel weight (K.I), grain yield per plant (GYP) and stress tolerance index (STI) were studied. Watering regimes (W.R) combined across each inbred generation are highly significant source of variation for ASI, KI and GYP. Inbred lines of the three generations varied highly significantly under both watering regimes for K.I, GYP and STI. However, for ASI only all S₁'s varied significantly under normal irrigation, but S₃'s are highly significant in both irrigation trials. The S₂ and S₃ showed somewhat significantly higher reduction for K.I due to drought stress in all groups of inbreds except those of C.1 and ARC. All the groups of inbred lines of the three generations recorded significantly about 8-14% ratios of GYP depression due to drought. The estimates of STI in S₁ and S₃ over parental origins were  higher (1.47 and 1.35) than obtained by S₂ (0.88).The developed maize inbreds exhibited desirable performance accompanied with reliable drought tolerance and sufficient variation that offers further responses to upgrading.  The validity of obtained inbreds for rolling in maize hybrids programs will be accomplished by assessing the combining abilities as different heterotic groups.