Inheritance of stay green physiological determinants in drought tolerant maize inbred lines

Stay green is the plant’s ability to sustain photosynthetically functional leaf area for longer periods, even with excessive water stress. This study was done understand gene action that controlled inheritance of stay trait general objective contributing breeding more drought tolerant maize varieties. 10 F1 hybrids from crosses between highly performing and least inbred lines as regards selected physiological determinants were planted under a rain out shelter well-watered control water-stress treatments applied six weeks after planting eight planting. With progress in days flowering, data collected on relative chlorophyll per unit (RC: LAUG), maximum quantum yield photosystem II photochemistry (ΦII), non-photochemical quenching (NPQ) linear electron flow (LEF). RC: LAUG NPQ mainly inherited by additive action. ΦII environment than interallelic interactions while LEF interactions. Key words: Additive, inheritance, non-additive, photosynthesis, green.