

Without the drought tolerance, nutrient use efficiency, pest and disease resistances, and many other traits that are built into genetic fabric of plants adapted to the dry tropics. It would be difficult to envision a Grey to Green Revolution. Much progress has already been made using conventional breeding to accentuate these traits and add new ones. But may believe that what has been achieved so far will pale in comparison with the advances yet to come through the revolutionary new tools of biotechnology.