I feel eugenics wise, that would make it a sex linked trait and I am not very sure that is true. I think it just comes back to the fact some plants have more dominant traits compared to others, but not necessarily sex related. I know some people breed complete lines without using males and are able to raise the potency of their strains without ever using a male plant. Also, to say that males carry over more potency would place potency on the Y chromosome, but we know not all males are more potent than females. Some are good, some are bad.
Not saying males are bad mind you, just I think noone can scientifically say that males carry over potency better. Otherwise it would be logical that if I cross 2 clones (females), one with a male and one a female of a more potent strain, the male cross would be more potent. I've just never seen data that says that, doesnt mean it isnt possible.
Tldr; a lot of typing without me definitively saying a thing ;p