Dwarfing genes Rht4 and Rht-B1b affect plant height and key agronomic traits in common wheat under two water regimes

In conclusion, Rht4 did not show advantages over Rht-B1b on grain yield, but Rht4 + Rht-B1b did, in both water regimes, which suggests that Rht4 should be combined with Rht-B1b in wheat improvement.