Genotypic variations of phosphorus utilization efficiency of crops

Intra-specific variations of phosphorus-utilization efficiency (PUE) hold g reat promise in rationalizing the application of cost-intensive phosphatic fertilizers in resource-poor situations, and to extend the useful life of t he phosphate reserves in the world. In developed countries, efficient P-usi ng crops may find significance in protecting the environment by reducing po llution of surface and ground water resources. This paper briefly reviews s ome of the work done so far on genotypic variations of Phosphorus (P)-nutri tion of craps. Several physiological mechanisms responsible for such variat ions have been recognized. Various screening techniques to select P-efficie nt genotypes are also discussed. In addition, a brief historical account is also given on plant genetic approach to tackle soil problems.