Rice OsOFP22s gene and method for increasing rice grain length, thousand grain weight and amylose content by using rice OsOFP22s gene

The invention discloses a rice OsOFP22s gene and a method for increasing rice grain length and thousand grain weight and improving amylose content by using the rice OsOFP22s gene, the rice OsOFP22s gene is highly expressed in seeds, can specifically improve related traits of rice grains, including grain length, thousand grain weight and amylose content, and has no obvious influence on other main agronomic traits of rice plants. The OsOFP22s is overexpressed in the rice by utilizing a gene engineering technology, so that the thousand seed weight of the rice can be obviously increased, and the grain shape and the cooking taste quality can be improved; through comparison, the OsOFP22s overexpressed rice is superior to a control group in the aspects of grain length and thousand grain weight, the amylose content is obviously reduced compared with the control group, the cooking taste quality is also obviously improved, and the OsOFP22s gene has a very good application prospect in high-yield and high-quality breedin