The invention relates to genes for promoting rapid growth of plant, characterized in genes that are Banana ABC transporter MhPDR1 or MhPDR2 genes, wherein the transporters have amino acid sequences depicted in SEQ ID No: 1 and SEQ ID No: 3, respectively, and the genes have nucleotide sequences depicted in SEQ ID No: 2 and SEQ ID No: 4, respectively. The invention provides further applications of the banana transporter MhPDR1 or MhPDR2 genes, characterized in that the over-expression of the genes in a plant can promote rapid growth of the plant. In addition, the present invention provides a transgenic plant or partial organ, tissue or cells thereof containing the genes or derivatives thereof; as well as provides further a method for promoting rapid growth of a plant.