Grafting. Grafting is to graft a branch or bud of one plant onto the stem or root of another plant, so that the two joined parts grow into a complete plant. Hybridization refers to the offspring produced by the mating of different species of plants. Apple pears are made through plant grafting technology. Apple fruits similar to pears can be cultivated by grafting branches of apple trees on pear trees. So apple pears are grafted.