The unusual appearance of dark-footed cuckoo d’Anvers

[Amer]

Is this melanin in the epidermis? Or dermal melanin? These are single factor cuckoo d’Anver cockerels. The mother was cuckoo and the father was black. Will only time tell? The hen only exhibits melanin in the epidermis.

Mom (her legs are only an inch long. Very tricky to photograph.)

 

[Amer]

@nicalandia

 

[nicalandia]

Epidermal melanin, on hens and heterozygous males only have one copy of sex linked barring so epidermal melanin is more commun

 

[nicalandia]

Barring itself has a melanin diluter but(feather an tisue) but its not responsible for clear shanks, barring its extremely closely linked to dermal inhibitor Id. So closed that you only have about 1% chance of getting B/, id+/id+ crossing over recombinants.

 

[Amer]

Barring itself has a melanin diluter but(feather an tisue) but its not responsible for clear shanks, barring its extremely closely linked to dermal inhibitor Id. So closed that you only have about 1% chance of getting B/, id+/id+ crossing over recombinants.

Thanks! Epidermal melanin, then. I didn’t know you could see it in chicks.

 

[nicalandia]

Thanks! Epidermal melanin, then. I didn’t know you could see it in chicks.

Barred Rock chicks(usually females) will have dark shanks then they will grow out of it

 

[Amer]

In case anyone wanted an update, here my best one is.
In sun and shade he has very light blue legs.

 

[nicalandia]

Nice, that may very well be id+, the issue with White/Clear Shanks on barred birds is not that Barring on itself will not allow expression of dermal melanin but that Sex linked Barring and Sex linked Dermal Inhibitor(Id which produces clear shanks) are linked by like 1-2 centimorgan which will only give you a 1% chance of getting B/B id+/id+ birds(99% will be B/B Id/), to confirm that you have B/B id+/id+ male I suggest test mating it with a Fibromelanotic Hen(Fm/Fm which are id+/- b+/-) if all of the offspring's hatch with black skin(not only dark shanks but actual body skin) then this rooster is indeed id+.

 

[Amer]

Nice, that may very well be id+, the issue with White/Clear Shanks on barred birds is not that Barring on itself will not allow expression of dermal melanin but that Sex linked Barring and Sex linked Dermal Inhibitor(Id which produces clear shanks) are linked by like 1-2 centimorgan which will only give you a 1% chance of getting B/B id+/id+ birds(99% will be B/B Id/), to confirm that you have B/B id+/id+ male I suggest test mating it with a Fibromelanotic Hen(Fm/Fm which are id+/- b+/-) if all of the offspring's hatch with black skin(not only dark shanks but actual body skin) then this rooster is indeed id+.

Interesting! I have some Silkie hens, so I may try that.
I think I have seen actual dark skinned cuckoo Silkies, but I’m not sure, because they were sort of fluffy.

I have a question. Does having only one barring gene increase the likelihood of getting id+?

 

[nicalandia]

Interesting! I have some Silkie hens, so I may try that.
I think I have seen actual dark skinned cuckoo Silkies, but I’m not sure, because they were sort of fluffy.

I have a question. Does having only one barring gene increase the likelihood of getting id+?

The chances are the same about 1%. You can have B/B, Id/id+ and will not tell them apart from the B/B, Id/Id. Cuckoo or Barred Silkies have broken the B-Id Linkage already and show black skin, but the face may still be redish due to the Barring natural pigment inhibitor.