comb genetics-dominant?

[klf73]

I want to take a rose comb over pea combs, The ideal result is pea combs. I was just wondering how many crosses back in I need to make after the outcross to tighten the comb up

thanks for the responses everyone, I learn something new everyday

 

[Sonoran Silkies]

Do I understand that you want to start with birds who have a rose comb, breed a pea comb in and then breed the rose comb out? Changing the bird (or I should say its descendants) from rose combed to pea combed?

If that is correct, then I'd suggest breeding out the rose before adding the pea. Longer to do, but more obvious traits for selection.

Breed to a single combed bird. Select fr single comb; if none are breed the youngsters back to a single combed bird. This time there should be some single combs. Select them and breed to a pea combed bird--ideally one who is homozygous for pea comb. All the babies should have pea comb. If the pea combed parent was het., about 50% of the offspring should have pea combs, select them.