Cuckoo Maran Rooster x (breed here) offspring?

[RAREROO]

Quote:
I'm not a Gal. lol

But when you breed your original white leghorn hens with any colored roo, all of the offsring would me mostly white and should have black spots, depending on the roo you breed with, for exanple a red roo, may give the white birds a little bit of reddish color under the neck and maybe a little pale red lacing on the breast feathers.

If you bred your white hen with black spots back to the cuckoo roo, you should get about half whites and half cuckoos.

If the ones from the cross with the red roo that I mentioned were bred back to the red roo, that would give whites, Blacks, Red Columbians ( Like RIRs ), and white patterned red columbians ( meaning dominant white replaces the black) ( like Red Sexlink hens), but they would not be sexlinks.

So basicly the F1 cross will give all off white birds, any crosses after that can very depending on the colors of the parents.

 

[PlumTuckered]

Yikes, so sorry Sir
I'm going to save this info and read it about 20 times with hopes it might stick in this old brain. I always get so confused on the genetics stuff, but find it so interesting.

Michelle

 

[RAREROO]

Quote:
LOL No Problem

And yeah, genetics can give you a headache trying to digest all of it, but I also find it very interesting and easy to pick up on and apply once you start to understand how things work.

 

[australorp_breeder]

Okay, my turn to throw some genetic questions out! So...what do you predict the chicks would turn out for the following?

1) Black Australorp rooster x Buff Plymouth Rock?

2) Black Australorp rooster x Blue Cochin?

3) Black Australorp rooster x Brown Easter Egg?

4) Black Australorp rooster x Cuckoo Maran?

5) Black Australorp rooster x White Leghorn?

I'm asking because in the future those are the breeds of females I would like to have total. And then I plan on breeding and hatching.

 

[Lensters]

Here is a handy little tool, very similar to the one that RareRoo is using.

http://kippenjungle.nl/kruisingKipFlexTree.html

I'd take a shot at your latest question but I have no idea what the Australorp genotype is.

 

[australorp_breeder]

lol! All this time I thought RAREROO was just getting all of this off the top of his head! I tried the poultry calculating site and it was too difficult for me to figure out. But thanks anyways. I found a more basic one:

http://www.edelras.nl/chickengenetics/html_pages/calculators.html

But first off, I don't know how to tell if my chickens are homozygous or heterozygous. Is like...homozygous a purebred and heterozygous a cross/mix?

 

[Lensters]

RareRoo does know his genetics, we've had some interesting discussions in the past (via PM) so he is probably doing some of it off the top of his head. However, some combinations don't always turn out to be intuitive, especially when you fool around with the E locus. Some genes work together in "weird" ways, such as the Sl and Co genes.

That is a new calculator to me. Seems more straight forward to learn on but I like the other one as it all fits on one screen, has the easy tab navigation (once you learn the tabs) and it has pictures!

The edelras site will be "super cool" when they get the genotypes page completed.

You can only truly know if a bird is homozygous if it displays the characteristics of a pair of recessive genes or if you breed the bird in question to something with a pair of recessive genes and that characteristic doesn't show in any off the offspring. I did some research and wrote a paper on this, I believe 16 offspring not showing the characteristic gives you a >99% probability that the bird doesn't have the recessive gene.

However, in good breeding programs purebred birds are homozygous in the complete dominate/recessive genes. The incomplete dominate genes are often desired to be heterozygous, such as tbe Bl/bl for blue colored birds.

Creating homozygous, or birds that breed true, is why creating new varieties of a breed can be so difficult. The "inventor" is most likely mixing many genes, creating heterozygous combinations that it will take hundreds of birds over at a minimum of four generations to clean out the undesirable recessives. Then if the "inventor" wants APA recognition they have to go through a lengthy process with the breed's club and the APA to get the variety recognized. Even then, well over half of the proposed varieties are rejected along the way. Not that I consider it a bad thing, because when a new variety is created people should know they can get stock that breeds true.

 

[australorp_breeder]

My bad, RAREROO. Sorry about that.

Okay, but what I don't get is which would be for my Black Australorp...Extended Black or Charcoal? And since I don't really know if they are homozygous or heterozygous should I just choose the colors they are and go from there?

 

[Lensters]

Assume they're homozygous (as they should be, unless you have some blues) and use the genotypes from this chart:

http://www.edelras.nl/chickengenetics/genotypes.html

 

[australorp_breeder]

Thank you. I favorited it, lol. Yes, I do have two Blue Cochins, if that's what you meant. I fiddled around with the website to see what their offspring might look like and I guess I did it wrong because... For example, it kept saying that the offspring would be 1/2 and 1/2 for each pairing I tried. Like when I tried Black* Australorp w/ Blue* Cochin it said 1/2 would be black, and 1/2 blue.