A study aimed to improve drought tolerance in wheat through a breeding program. They used advanced breeding lines from a cross of drought-tolerant and susceptible wheat varieties. After three rounds of selection, the new wheat lines showed reduced canopy temperature and chlorophyll content, but improved yield and drought tolerance. The new lines had better grain filling and increased grain yield under water stress conditions. They also found a mix of genes that contributed to drought tolerance. However, the increased yield under stress led to a decrease in biomass. The study identified potential wheat lines with high yield and drought tolerance for future development in water-limited areas.