Crele would be based on your blackred (what we call black breasted red) with the barring gene added. You need to get the barring gene on E (extended black) or E^R (birchen). So based on what you already have, I would put a crele cock over your very darkest (least amount of white) birchen females. It would be better if you had black to cross the crele with, as I'm not sure you can pick up enough melanizers using the birchen birds , but it is worth a try if you can't find blacks to use. Don't go the reverse route, birchen male over crele females, as you won't get any barred female offspring from them. You won't get instant results the first generation, but mate the F-1's together the following season, raise a lot of birds from them, cull heavily, and work from there. There is no need to reintroduce crele a second time, as once you have the barring gene in the line it is easy to keep it going. You can cull chicks at hatch if they don't have barring, as they will be lacking the white spot on the head.
Last Edit: Aug 9, 2011 10:28:38 GMT -5 by chantecler
Pilgrim in a foreign land and a true believer.
1 John 5:11-12