Physiological Basis of Yield Variation in Rainfed Groundnut

Correlation studies showed that dry matter accumulation (DMA) at 50 and 70 days after sowing (DAS), and leaf area index (LAI) at 70 DAS were three key growth variables positively influencing the pod and oil yields of rainfed groundnut. Among yield components number of pods per plant and shelling per cent were found to be the most important factors to determine the pod and oil yields, The varieties significantly varied in growth parameters such as plant height, DMA and LAI, and yield components such as pods per plant, number of kernels per pod, shelling per cent and 100-kernel weight ICGS 44, TG 24 and JL 24 were the high yielders among the twelve varieties tested under rainfed condition.