Exactly.
I run two lines of a poly hybrid cross and have
made selections among the crosses to flower
plants that segregate uniformly for major traits
that I, and many others like.
Aware of the downside of such a program, and likely
have culled many, many more plants then kept.
My goal is to make a new P1 X P1 breeding pair, and flower
seeds to judge uniformity, culling along the way.
Crossing by open pollination as well as back crosses.
Slow going as I do micro style, 6-8 plants at a time.
No worries, I got time.
I recently crossed a thunk with a vintage White Rhino,
and I'll flower those seeds as F1's until I run out.
Then I'll cross again with the thunk P1 and WR P1,
and have another batch of known outcome seeds to grow again
As I see it, the thunk and White Rhino P1's are set by the breeders who made those genetics,
with no need for me to mix it up with F2's and back crossing of those known genetics.
My poly hybrid crossing program goal is to get the P1 x P1 set that makes seeds that flower
plants within my guidelines for uniformity, just like the thunk x White Rhino example.
Not easy, but certainly worth my effort, and yours,
if you choose to develop the skills and make the time
required for the project.
