I am bringing my question from the Heritage thread over here to continue.... I don't want to interrupt that thread with my breeding questions.
Chris09 said: Barred Breeds that carry the Slow Feathering Gene (K^s) or the Very Slow Feathering Gene (K^n) will have better, crisper, cleaner Barring than breeds that carry a "normal" or rapped feathering gene.
The Barring Gene (B) is a gene that starts and stops pigment production and as the feather grows to give the barring pattern.
The extremely narrow and sharp barring seen on well marked Barred Rocks is achieved by the presence of the K gene for Slow Feather growth, which allows for a lot of on/off sequences in the time it takes for a feather to grow. The same barring (B) when on a rapped feathering breed gives wide, coarse, fuzzy "Cuckoo Barring" as seen in the Cuckoo Maran.
So with that said, the slower the feather growth on a Barred Rock the bettering the Barring will be..
I will also add this bit of information.
Sex determination based on slow and rapid feathering in egg layer chicks is widely used in poultry breeder farms in USA. In this method, the length of primer and secondary feathers at wing is measured. If slow feathering hens are husbandired with rapid feathering cocks, female hatchlings are rapid feathered while males are slow feathered. However, chicks having slow feathering gene show late sexual maturity and reduction in egg production and need a higher amount of dietary energy.
Chris
Why is one a, "Dark Barred" and the other a, "Light Barred"?
Most likely the, "Light Barred" carries two copies of the Barring Gene where as the, "Dark Barred" most likely only carries one copy of the Barring Gene as with Barred Hens.
kathyinmo said: Would there be a benefit to using one over the other? I mean, if you have a light barred and a dark barred, would you only use one? Which one?
Chris09 said:I myself like the, "Dark Barred" for Showing. They look, "Cleaner" and more, "Crisp" and tend to make the White look brighter.
Chris
My next question:
In breeding, when would you use a lighter cock? Or when would you not use a lighter one? Are there occasions when one is better to use than the other?