Question

What are stock and scion in grafting?

Answer 1

The scion contains the desired genes to be duplicated in future production by the stock/scion plant. In stem grafting, a common grafting method, a shoot of a selected, desired plant cultivar is grafted onto the stock of another type.

Answer 2

In Grafting Stock is the lower part of the union. It has the roots
Scion is the upper part of the union.