Drought is the major abiotic stress affect the crop growth throughout the life cycle and ultimately reduced the crop yield. Therefore, the present investigation was conducted during kharif-2018 at Sorghum Research Station, Sardarkrushinagar Dantiwada Agricultural University, Deesa, to determine the effect drought at flowering stage of sorghum on growth and physiology which finally leads to the impact on yield. Trial was laid out in Split Plot Design, with 12 genotypes in five replications under control and water deficit conditions. Genotypic variability was observed for the growth, physiology and yield parameters. In case of relative growth rate, net assimilation rate and crop growth rate, genotype DS 183 again proved significantly superior to rest of all other genotypes under water deficit condition. The genotype DS 183 recorded maximum relative water content, membrane stability and SPAD meter reading. The genotype DS 186 registered maximum drought tolerance efficiency. It was concluded that genotype DS 183 recorded maximum grain yield due to the maintenance of higher water status and growth rate in water deficit condition as compare to other sorghum genotypes.

Highlights

• Sorghum are most importance crop and most preferable for eating in allover world. Now a day different abiotic stress effect on reduced yield but major problems due to water stress.
• So, identifying different sorghum genotypes those are best performance based on physiological characters as well as high yielding under water deficit condition.