Yeah there is no reason to keep the original plant from seed as a mother or any mother really. One can cut a clone of a clone for a long while without any degradation. I personally have grown a strain like this for over 7 years with no issues. Thats a lot of generations the way I was doing it. One can cut a clone from a plant before sending it into flower then cut a clone off that plant before sending it into flower and so forth. This saves the space and energy that a monther would require and if you are on a plant count that frees up a plant.
