If you cross Lowryder with x18 you get Lowryder x x18, F1
Now if you take the (Lr x x18, F1) and backcross it back to x18
(Lr x x18, F1) x x18 Bx1 < non auto
If you take the Bx1 and self it.
Only 6% to 12% will be auto-flowering.
I just thought I would point that out to you.
Good luck!
Zy