Assessment of Gene Action to Develop Drought Tolerance Maize Inbred Lines

2 Abstract: Drought is one of the most significant environmental pressures around the world. The climate changes and increasing population pose serious factor to crop improvement. It is one of the most serious production restraints for world agriculture and is estimated to get worse with anticipated climate change. It is thought that understanding of how plants reply to drought at the molecular level are useful for developing improved genotypes which would accomplish well under drought. Maize (Zea mays L.), one of the most important food crops in the world, is very sensitive to drought, especially during flowering, pollination and embryo enlargement. Inter-disciplinary scientists have been trying to understand and dismember the mechanisms of plant tolerance to drought stress using a variety of tactics; however, success has been inadequate. Recent genomics and genetic approaches coupled with developments in particular phenotyping and breeding methodologies are expected to be more efficiently unravel the genes and metabolic pathways that discuss drought tolerance in maize. Topics enclosed by this review include the theoretical framework for improvement of traits accompanying with yield comeback to drought and how to overcome the drought conditions.