Brown Sussex genetics

[Garethhale]

A few photos of the brown Sussex chicks I hatched yesterday. Pleased with these given the air sacs were pretty much all detached after posting.

 

[nicalandia]

Thanks for posting pics of your brown sussex, those chickes are without a doubt e+ wildtype, I would appreciate it alot if you keep posting pics of the chicks as they grow

 

[Garethhale]

11 days old today. Starting to feather out fairly well. I think the darker are girls and the lighter are boys but that may just be coincidence. A few weeks time and it should all be a little clearer

 

[nicalandia]

I think the darker are girls and the lighter are boys

I agree with that, Welsummers can be sexed that way, for more info about it: http://www.aviculture-europe.nl/nummers/10e02a15.pdf

 

[Garethhale]

Here’s a few photos of the latest Brussbar hatchings. Two boys and a girl. The boys are there lighter colour and the girl is the darker bird with the eye liner. She’s a little scraggly as she got a bit stuck coming out of the egg. Hatched 2 days ago

 

[nicalandia]

Thanks, for keeping us posted.

 

[3riverschick]

I don't know what the 2 chicks with head spots are in Pic BC771E in post 55. But these are not e+ based are they, Nicalandia?
@nicalandia
Best,
Karen

 

[nicalandia]

I don't know what the 2 chicks with head spots are in Pic BC771E in post 55. But these are not e+ based are they, Nicalandia?

They are wildtype e+/e+ the chick down has been modified by homozygous sex linked barring B/B, that is why they can be sexed at hatched compared to the regular wildtype female chicks

Double barring has a profound effect on the males chick down, it's no only about a head spot, but the down gets lighter, the chipmunk stripes get too blurry

Example:

 

[nicalandia]

Some Pullets do get a small head spot sometimes, but these pullets have a well defined chipmunk stripes pattern that one can sex them at hatch comparing them with the blurry pattern of the females.

Cream Legbar pullet with headspot but clearly defined wildtype chick pattern.

 

[3riverschick]

Thank you nicalandia!!