Maize (Zea mays L.) is word''s second leading cereal crop in respect of area and production with the possibility of raising two grain crops in a year, it forms important component of the agricultural economy of Pakistan.Drought results in reduced crop yield, pasture deterioration and livestock death. It strongly affects the production of cereals and poses a serious threat to the food security of households, countries and even entire subcontinents. In future the destructive impact of drought may grow, as the climate change becomes a reality. The maize crops may experience reductions of grain yields when submitted to water deficit during the critical period of crop cycle from tesseling stage to beginning of grain filling.The use of genetics to improve drought tolerance and provide yield stability is an important part of the solution to this problem. Present investigation might be helpful for the readers all over the world as it contained plenty of information regarding drought tolerance in Maize.