Selfing to achieve 4N breeders

[zxyqu]

With regards to a 3N x 3N cross, it depends really. More than likley, a few, and a very few at that, of the seed will possibly be viable. In general 3N plants are pollen infertile, but some seed is possible. However, selfing them will still result in 3N plants if ANY survive. 3N plants should only be used as pod parents, and that's if AT ALL used in breeding, because this creates further ploidy issues (lovingly termed crapaploids). This is another problem with people creating 4N plants and not knowing it, as breeding with them only results in issues if a 2N plant is later bred with it.
Therefore, I really encourage anyone wanting to do colchicine treatments etc, find a way/person to confirm 4N status later on. That way you know what you're working with. Juts my opinion.
Also, as to compiling all this, we could ask that we create a sticky for some of this information.