Genotypic Variability for Spikelet Sterility under Moisture Stress and Aerobic Conditions in Rice

One of the main problems of rice cultivation and production is the lack of water resources, especially during reproductive stage. The present study was conducted to determine how drought affects grain yield and the process of grain filling and the observations were recorded on the number of spikelet's per hill, number of filled and unfilled spikelets per hill, 1000 grain weight and yield characters in thirty rice cultivars under moisture stress conditions and eleven cultivars under aerobic conditions. Simultaneously, the genotypic variation in spikelet sterility and yield and yield attributes was also determined. The data indicated that NLR 3010, NLR 40059, NLR 34242, NLR 33671cultivars showed the lowest spikelet sterility under moisture stress conditions. Furthermore, these cultivars also shows highest grain yield and harvest index than the other cultivars.