Abstract：

Introduction of the semi‐dwarf genes (sd1in rice,RhtB1bandRhtD1bin wheat) has drastically increased lodging resistance and grain yields in these two important crops since the 1960s, resulting in the so called ‘Green Revolution’ (Hedden,2003). Maize (Zea maysL.) is one of the most widely cultivated cereal crops in the world and increasing planting density is an effective strategy to increase grain yield (Duvick,2005). However, high planting density could trigger shade avoidance response and cause increased plant height and ear height, prone to lodging and yield loss. Thus, reducing plant/ear height and increasing lodging resistance is a continuous goal for maize breeders.

Keywords：maize; dense planting; lodging resistance; D1; ZmSPL12