The Official Forum of the Ameraucana Breeders Club > Breeding

Dominate silver

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jerryse:
I discovered this by accident when crossing a LF rooster [from John] over light brown hens.Trying to improve the light brown.I was surprised that the 3 cockerals had no straw or red shoulders as expected.I have decided to call it dominate silver.I have not seen it mentioned anywhere.I believe it is brobably established in John\'s line.How it occured is a mystery since there is no mention of it in another breed.Anyway I consider it a valuable find and a solution to autosomal red.Silver can now be crossed on light brown or BB red without producing golden duckwing.Flock matings with both colors can produce showable silvers and Lt.brown or BB red.I would think any breed with silver could benefit.Adding it to wheaten should produce silver wheaten and not salmon.Genetics is interesting stuff.

Mike Gilbert:
Jerry, I believe what you discovered was that the  hens used were not carrying Ar (autosomal red).   They (the females)are the culprits when silver cockerels end up with red in the back and shoulders.    There is no way to know whether a brown or a silver hen carries Ar short of test mating them to a silver male with no red and seeing whether the resulting cockerels develop off color or not.

jerryse:
I will continue to test my theory.The silver/brown cockerels have no straw color as is usual in such a cross and produced some brown chicks [pullets I assume] in their offspring from silver hens.This is a deviation from what silver normally does and deserves more study.I would like to hear of any similar results.I do not know if this is widespread in the LF silvers or if I have a mutant.I have not tried the cross of brown roo over silver hens to see how it behaves yet.Maybe someone else is curious enough to test the silvers.Autosomal red has been a pain for so long it would be great to overcome this obstacle.

jerryse:
I thought I would bump this topic up. Could this be due to the API gene that was mentioned on THE Classroom at the Coop. What do you think Mike ? I know I observed a suppressing effect on autosomal red and subsequent generations have had a range of suppression from none to complete.

Mike Gilbert:
Jerry, yes, I believe I posted on the thread you mentioned.   The Ap inhibitor gene makes a lot of sense.   I think it must be incompletely dominant, as you see some silver males with much less autosomal red than others.   Those must be the ones carrying one copy of the inhibitor, while the clean silver males have two copies.    That is my working hypothesis at this point until someone proves something different. 

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