Control plant height, lodging improve the ability to increase gene and its application tillers and yield

The present invention discloses reduce plant height, improved lodging resistance gene and its application SDT increased tiller number and yield. SDT gene encoding OsmiR156h. Tillering in semidwarfing of rice mutants sdt, 3'-UTR of mRNA sdt gene transcript length is shorter than the wild-type gene transcription SDT 3'-UTR, leading to gene transcription sdt than the wildtype gene expression level more SDT high. Genetic analysis indicated sdt is a semi-dominant mutation, which inhibits division of stem cells in the longitudinal direction between the respective sections to control the length and height, thus improving lodging resistance of rice; the same time, it can increase the number of effective tillering of rice, thereby improving rice grain number and yield per plant. The present invention demonstrated for the first time length 3'-UTR of mRNA transcription regulation OsmiR156h can alter the expression level of the gene, thus achieving rice cultivation prospect having desirable traits.