Final answer:
Grafting allows the combination of favorable stem and root characteristics from different plants, resulting in a chimera with desired traits. For example, in wine grape propagation, grafting European stems onto North American rootstocks combines disease resistance with superior fruit production.
Step-by-step explanation:
One advantage specific to grafting that Jesús is forgetting is the ability to combine favorable stem and root characteristics from different plants. Grafting allows the stem or scion of one plant to be attached to the rootstock of another plant, resulting in a chimera with desirable traits from both plants. For example, in wine grape propagation, stems from European species are grafted onto rootstocks from North American species to combine the desirable characteristics of both. This technique is especially useful when the root system of one plant is resistant to disease, while the shoot system of another plant produces superior fruit.