US President Joe Biden said he awarded Mr Ejeta the medal for his “outstanding contributions to the science of plant genetics”. Mr Ejeta is acclaimed as one of the world’s leading plant geneticists. He specialises in the study of sorghum, a popular source of food in Africa. In 2009, Mr Ejeta won the prestigious World Food Prize for developing a sorghum hybrid that is resistant to both drought and the parasitic weed Striga, which commonly invades farms in Africa. The National Medal of Science has been awarded by US presidents since 1959 to “individuals deserving of special recognition for their outstanding contributions” in various science-related fields.