question for people who know genetics stuff

Quote:

Originally Posted by v.cyr 

hellooo????

that´s a Sex link... all boys will be barred(cuckoo) and all the girls will be nonbarred...

that is a boy. Why? Barring is a sex linked gene. since the hens will only get their Z gene from their dad(the Z gene is where the Barring gene is located) the hens can´t be barred but the boys will because they will get a copy of their mother´s Z chromozome...

just keep breeding his sons or doughters(barred ones ofcourse, he will have a 50% of producing barred chicks) back to Brahma... in about 3 more generations you will get nice looking barred/cuckoo looking birds..

I've never heard of a barred brahma before. When people try to create a new variety of a breed, would that variety produced be different as far as standard wise from the pure original of that breed? For example, if I tried to create a new variety of Orpington, letsay barred orps, and I succeeded, would my new varietys standards be totally different from a black Orpington? I'm just a little confused.

Quote:

Originally Posted by v.cyr 

 

so, we should breed back to our full brahmas, not back to Thor, then...

 

also, would breeding him(and his offspring) to a light brahma give better results than breeding to our buffs(don't have any lights... yet... but we wouldn't mind an exuse to get some this year...at least a better exuse than "we just want some")

 

An out cross to a light brahma would be ok.  Barred rocks carry silver and that works well on them. The chick in the picture should carry a silver and a gold gene.  

I would like to add this to what Nicalandia posted earlier. Once you have the pea comb and proper leg feathering established in black/barred offspring; I would suggest doing a sibling cross. You want to do this to produce offspring that have two extended black genes at the E locus. When you do this it will help stop any non black color that will show in the feathers. There is another gene called melanotic that you want homozygous in your birds: that means you want two of them in your birds. Once you have two extended black genes and two melanotic genes in your birds- they should stop showing red or white color in their feathers. By white I do not mean barring. Black males that do not have the proper kind and number of genes tend to leak red or white into their hackles and back feathers. Females are a different story- they can have the same genotype as male ( not including sex linked genes) and still be black while males will show some red or white. Once you get good solid black/barred males- you have accomplished your goal. The males will be a lighter barred color than the females. If your males color is like your females you do not have two barring genes in the males. Males that have one barring gene will throw non-barred/black females. 

Tim