29 Mar 2019 --- Wheat makes up half of the global calories consumed either directly or as animal feed. An important paper now marks a shift in how breeders might approach wheat breeding to meet increased demand, using previously untapped sources of variation. The research, funded through IWYP (International Wheat Yield Partnership) highlights the role of radiation use efficiency (RUE), how sunlight is converted into plant mass, in increasing the yield potential of wheat – how we can increase plant biomass without sacrificing grain yield – which has previously been a significant challenge.