BAMA/mottled . What color will he Be? UPDATE on color

[BamaChicken]

Okay, I went and looked up that gene and I don't think that could be it. Sounds like they lose their color. My birds get white tips and then are molting back with color. Not losing. Am I understanding this rightl

 

[MissPrissy]

Vitiligo gene

Feather melanocytes in the Barred Plymouth Rock (BPR) and White Leghorn (WL) chickens die prematurely in vivo when compared to the wild type Jungle Fowl (JF) chicken. Since these mutant melanocytes live in vitro, an environmental factor in the feather must precipitate their death. Results show that the addition of selected antioxidants, glutathione (GSH) and superoxide dismutase (SOD), can rescue these mutant melanocytes in vitro that have been placed under stress conditions that cause their premature cell death. Measurements of in vivo levels of GSH, catalase, and SOD show no significant difference in catalase activity between the JF, BPR, and WL feathers but do show a significant reduction in GSH activity in both the BPR and WL feathers to approximately 66% of the GSH concentration found in JF feathers. SOD activity in the BPR tissue is reduced significantly to approximately 50% of the JF activity and the WL SOD activity is reduced significantly to approximately 50% of the BPR SOD activity. Preliminary results of measurements of glutathione peroxidase activity indicate there is no difference in the levels of this enzyme in JF, BPR and WL feathers. A working hypothesis, based on current results, is proposed for premature cell death in BPR and WL feather melanocytes. The BPR melanocytes are genetically sensitive due to a defect in their SOD and GSH levels caused by the barring gene (B) and their death, due to reactive species of oxygen radicals, is precipitated in the poorly vascularized feather by the accumulation of oxygen radicals due to the low turnover of tissue fluids. The WL chicken carries the dominant white gene (I) in addition to the B gene. This gene directs the further reduction of the level of SOD and, when combined with the cell death mechanism already present in the BPR chicken, causes the WL feather melanocytes to die much earlier than the BPR feather melanocytes which in turn die much earlier than the wild type JF melanocytes. This same mechanistic hypothesis could apply as a cause of premature melanocyte cell death in human vitiligo wherein the vitiliginous melanocytes may have a genetic defect in their oxygen radical protection system.​

 

[mikarod]

Yes, I was saying it sounds like the reverse of the Vitiligo gene! lol

 

[mikarod]

http://www.nvfi.org/pages/erf.pdf

I swear..those birds are MEAN! Ugh...the males are horrible!

The male that is pictured on the bottom is the same male throughout. It started out colored and came out that white. Yours is doing the exact opposite!

http://omia.angis.org.au/retrieve.shtml?pid=1965

When I worked with Dr. Erf they were REALLY close to discovering the single locus in the SL birds.

 

[BamaChicken]

Yes it is weird. They start out black. Now the mother to my Roo was not as white as he turn. I have pictures posted already but will be glad to repost. She molted out black. She is in a molt again but not a heavy one. So far she hasn't turn white or black and white again.Here is a off spring that is turning.

 

[BamaChicken]

BTW, welcome to Forum Mikarod. What I am trying to know is am I wasting my time working with this gene. I am trying to have Mottled Orps here in the USA or a unique color that we don't have. If I could understand what is happening with this color it would be helpful. I have'nt found an anwser yet. Here is a picture of the Black and white hen that is now black.

 

[mikarod]

Well, it COULD be a waste of time. Because if she's throwing mottled birds, then goes black, you can only show her as a black bird now.

Plus, it seems as though the offspring are turning black faster and faster from the photos, so eventually all you'll have are black birds. Have you tried breeding to a white bird to see if you can reverse the gene? Or at least have more white that WON'T turn black?

 

[Tuffoldhen]

Quote:

My understanding of the human kind is their immune system is compromised from birth....

 

[BamaChicken]

Mikarod here is where I am at with the breeding. The Cock in photo was a result of the above hen mated with a black Cock. I have chicks right now that have mottling coming on them sooner than what I have had before from the cross back from her son with color to her. The pullet in the above pic is only turning same as the father but could be the result of him over a black. I have a young cockerel the same age. I am thinking of trying several different breeding scenarios such as sibling to sibling with the gene and these young ones back to sire. I don't have access to any large white Orp fowl.

 

[MissPrissy]

Yogi is raising white orps. He might have eggs.