Mean grain yields for heat-tolerant (closed squares) and heat-sensitive (open squares) ideotypes, and 95-percentile of heat-stress index (HSI, open triangles) and drought-stress index (DSI, closed triangles) of heat-sensitive ideotypes for two sowing dates, default and 4 weeks earlier, as simulated by Sirius for the HadGEM2-ES (RCP8.5) climate scenario at six6 European sites. Information about sites and sowing dates is given in Table 2.