Soybean GmAP2-a gene and application thereof

The invention discloses a soybean GmAP2-a gene and an application of the soybean GmAP2-a gene. The gene is a member of a soybean AP2 subfamily, the nucleotide sequence of the GmAP2-a gene is shown as SEQ ID NO.3, and the amino acid sequence of protein expressed by the GmAP2-a gene is shown as SEQ ID NO.4. Researches find that the abiotic stress resistance of the plant can be improved by overexpressing the gene in arabidopsis thaliana, meanwhile, the stamen development abnormality is caused, and the soybean plant with the gene knocked out shows male sterility. The characteristics of the gene have huge application value in the aspect of breeding.