Sex- linked Information

[Bill Matthews]

To dheltzel......Your comments, and the others here, make a good read....One note.....I don't think that dark brown egg factor is dominant. So the cross between a Welsumer and ISA Brown will not result in dark eggs...I may be wrong...Often am...

 

[donrae]

Does Any of you Lot wish to Test my "Sex Before Hatch" Theory? its not a theory bubecause I have test it but so far I have yet to know of someone else that have done such test..


Silke Roo x White Leghorn Rooster will produce sexlinks, id+/Fm vs Id/Fm sexlinks, females will have black skin, males will have a clear yellow/white skin

I was able to sex the about a week before the hatch day because the females would look so black the light would not go thru as nice as the males do, so side by side you could tell the big difference, making them the first before hatch sexable sexlinked cross,...

so If any of you guys are about to do the same or similar cross, would you mind taking pics and posting your results?

I'm working on it! My little silkie rooster is taking a while to settle in. I'm not sure the two big girls' eggs will work...they're ee/leghorn crosses and lay very pale blue/green eggs. Not sure I can candle them. The other two in his pen are bantam cochins, light brown/cream eggs...should be fine. Got my incubator parts and will try to get it going this weekend....so many projects going on, though, and the whole world (apparently) doesn't revolve around my chickens....

 

[nicalandia]

To dheltzel......Your comments, and the others here, make a good read....One note.....I don't think that dark brown egg factor is dominant. So the cross between a Welsumer and ISA Brown will not result in dark eggs...I may be wrong...Often am...

its quite dominant, when Dr. Punnet Cross a Welsummer rooster to his Chilean Blue egger stock he got the first documented OLIVE egger way back in the 1930s

 

[donrae]

its quite dominant, when Dr. Punnet Cross a Welsummer rooster to his Chilean Blue egger stock he got the first documented OLIVE egger way back in the 1930s

Does anyone know how much this carries over to future generations? I have a rooster that's half Welsummer (don't know what color eggs he'd lay, obviously

) who I'm putting over barred Rock hens for a sex link brown layer. The offspring will only be 1/4 Welsummer, is there a good chance they'll lay darker than average eggs?

 

[dheltzel]

Does anyone know how much this carries over to future generations? I have a rooster that's half Welsummer (don't know what color eggs he'd lay, obviously

) who I'm putting over barred Rock hens for a sex link brown layer. The offspring will only be 1/4 Welsummer, is there a good chance they'll lay darker than average eggs?

I believe the full set of genes for brown eggs of the various shades are not well understood. It's not a single gene, like the blue color, as evidenced by how hard it is to breed back to an all white egg if you ever use a brown egg layer in the crosses. It's easy to remove the blue color because it's dominant and a single gene.

So, you *may* get some darker eggs from that cross, or maybe not. Repeated crosses to a dark egg laying breed would get you closer. It seems pretty easy to "lose" the dark color, but not easy to lose the lighter brown shades.

 

[Ridgerunner]

Here is a good thread that discusses the brown egg genes.

https://www.backyardchickens.com/t/840867/clarifying-brown-egg-genetics

There is a link to an article Tim wrote buried in that thread. I’ll put the link here. It’s worth studying.

http://www.maranschickenclubusa.com/files/eggreview.pdf

There are brown egg genes that can tint the entire palisade layer (the entire thickness of the egg shell). There are brown egg genes that are laid in top of the egg shell. These are the ones that can be scraped off. There are genes that can modify the shade of brown. There are genes that can neutralize brown egg genes and give you a white (or blue) egg even with brown genes present. It’s pretty complicated. What you get is dependent on which genes (recessive and dominant) are present and how they interact. In all that reading, Tim said he was able to get to a blue egg from a green pretty quickly, at least one time.

 

[donrae]

Thank you Ridgerunner! I'll put that on my to be read list.

 

[nicalandia]

I believe the full set of genes for brown eggs of the various shades are not well understood. It's not a single gene, like the blue color, as evidenced by how hard it is to breed back to an all white egg if you ever use a brown egg layer in the crosses. It's easy to remove the blue color because it's dominant and a single gene.

So, you *may* get some darker eggs from that cross, or maybe not. Repeated crosses to a dark egg laying breed would get you closer. It seems pretty easy to "lose" the dark color, but not easy to lose the lighter brown shades.

I agree

 

[Rachele]

Could you cross a Faverolle rooster with a Barred Rock hen to get the sex link? What could you breed with a Faverolle rooster to get this?

 

[cmom]