Deciphering drought tolerance potential of sweet corn genotypes through polyethylene glycol induced drought stress

Abstract

Drought is a restraining factor for the major dependent factors like yield. Pertaining to this issue, analyzing thedrought potential of the sweet corn is a major concern. The present investigation was carried out to reveal thdrought tolerant potential of sweet corn genotypes by invitro screening under four levels of osmotic stress (0, -2,-4 and -6 bar)  using PEG. The material used for the study included six lines and five testers and their correspondingthirty hybrids synthesized in a line x tester mating design. The seedlings exhibited a significant variation for all thetraits and indices analyzed. Under high stress, SVI of the selected entries were found to be higher because ofincrease in germination percentage and seedling length which would ultimately lead to better field emergence.Performance of the hybrids WNC12039-1× 45503, WNC12039-1×45678 and SC11-2×45679 excelled over thecommercial check i.e. Misthi when subjected to lower water potential. Based on the preliminary study, the identifiedinbreds WNC 12069-2, SC 11-2 and the hybrids WNC12039-1×45503, WNC12039-1×45678 and SC11-2×45679could be further evaluated in the field.