It sounds like you have absolutely no idea what genetic engineering means.
Selective breeding is selecting two banana plants that have characteristics you want, moving pollen (or however it is that bananas reproduce) from one plant to another, and growing, and selecting the "best" plants from the offspring, to get the banana plants with the characteristics that you want.
Genetic modification is snipping part of the genetic material from an eggplant and inserting them into a banana seed(?)'s genes.