Method for changing flowering period of rice by gene editing and application

The invention belongs to the field of crops, particularly relates to a method for changing the flowering period of rice through gene editing and application, and more particularly provides application of editing rice DTH7 and DTH8 genes at the same time through a gene editing tool in changing the flowering period of rice. Gene editing genetic transformation vectors aiming at rice flowering control genes DTH7 and DTH8 are designed and constructed, rice is transformed by an agrobacterium-mediated method, simultaneous multiple editing of nucleotide sequences of a regenerated plant DTH7 gene target region and a DTH8 gene target region is realized, the gene editing efficiency reaches up to 100%, and the gene editing efficiency reaches up to 100%. Compared with other flowering control gene combinations, the non-transgenic and stably inherited homozygous editing rice line with the growth period shortened by 45 days or above is finally obtained, and compared with other flowering control gene combinations, the floweri