Preliminary Study on Dwarfing Mechanism of Maize Dwarf Mutant 52333~(Dt)

The maize dwarf mutant 52333 was bred by Shandong Agricultural University. The dwarf trait was controlled by a new single dominant gene, which was temporarily named Dt. Based on previous study, the preliminary research on the dwarfing mechanism was carried out. The results showed that in segregation population, the plant height of dwarf individuals was only 49. 57% of that of the high individuals, and the dwarf individuals had one intemode more than the high individuals on average; the internodes were shortened equally. The cytological observation revealed that the internodes were shortened because the cells stretch in dwarf individuals were inhibited.