You take out the eyes of a potato and stick it in the ground and you've also created a genetically identical clone. I'd bet most potato varieties are farmed this way and have been for a long time.

All of the bananas you eat are also genetically identical, since all banana trees grown for U.S. markets are clippings from the same original cavendish tree. Bananas is a real concern though for U.S. markets and there is currently a blight spreading, but the good news is there are hundreds of types of bananas, most of them more flavorful. The hard part is shipping them to the U.S. without bruising.