Breeding of groundnuts for drought tolerance may enhance production in water deficit areas. The current study intended to determine heritability estimation and association of harvest index and SPAD (Soil Plant Analysis Development) Chlorophyll Meter Reading (SCMR) with some yield contributing traits by using 30 groundnut genotypes planted under two watering regimes i.e., T1= watering to plants at 5 days of interval (Well Watered), T2= watering to plants after 10 days of interval (Water Deficit). The main aim was to accelerate the breeding programs of groundnut genotypes tolerant to drought. Triplicated split plot design was used under controlled water conditions at Groundnut Research Station, Attock, Pakistan. Data was collected on plant height, number of pod/plant and pod yield/plant, harvest index (HI), SCMR at 50, 70 and 90 DAS. Heritability in broad sense was calculated for plant height, harvest index, pod yield, number of pod/plant and SCMR values. Results confirmed that number of pods/plant, SCMR at 70 DAS and HI were considerably correlated to pod yield/plant in both water deficit treatments. Harvest index exhibited highest heritability estimated in both treatments (0.65 & 0.51respectively). Due to SCMR at 70 DAS, number of pods/plant and harvest index having medium heritability and significant association with pod yield under water deficit condition, could be handy criterion in selections of groundnut genotypes in drought regimes

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