Castor color genetics?

[Kyle@theWintertime]

Soon (possibly tomorrow) I will be picking up a black "charlie" doe. She may have Castors in her background though. Will that affect what she "throws" if bred to a genetically black rabbit? What are the chances of some other color cropping up? :x

 

[Wyldrose]

Castor is agouti or wild color and it is a dominant trait.
Castor is A?(could be A or a)
Black is aa
So there is no chance that your black will produce castors unless you breed her to a castor.

Breed her to a black rabbit andyou will produce all broken blacks if she is a true charlie. If she only has one broken gene then you'll get 1/2 blacks and 1/2 broken blacks.

Recessive genes like dilute(blue)can be carried many many generations and pop out at times. Of course both have to carry the gene ande it has to match up to get something else.

 

[Kyle@theWintertime]

WHEW, awesome, thanks! I got worried when I found out she had Castors behind her. Now I feel better.

I do believe she's a true Charlie...the photo I got is small and blurry, but she's almost all white except for black ears and a few tiny black dots on her face and a bit around the eyes. Both parents were broken, too.

 

[Dood]

The term 'castor' is usually used by Rex breeders to describe their chestnut/ agouti buns. The Rex coat gene is recessive so if she has it in her background it may crop up when bred back to her young.

The Rex gene also shortens coat length, while Champagnes are supposed to have longer guard hairs compared to other rabbits. Maybe you should ask a few more questions about her heritage to be sure she will be a good addition to your broken chamagne project.

 

[Kyle@theWintertime]

Her breeder does also breed Mini Rex so she may well have that behind her as well. However as the Rex coat is recessive I'm pretty sure it won't be TOO much of a problem, and I do plan to cull hard...these will be primarily for meat/fur. I'm also expecting this to take a lot of generations, so if I get some unwanted or undesirable genes, well...more culling. I also won't cross them back into my Champagnes...I don't want to shoot myself in the foot so to speak so I'll maintain both my broken crossbreds and my pure Champagnes. Gods forbid I ruin my purebreds!

 

[Jack]

Castor is red agoutie
so it's a AA BB CC ?? with a EE and or WW for color and or wide band extention

 

[Devon's Mom Lauren]

Castor is Black agouti! Red is non-extension agouti....a black rabbit will only have self, so no worries there; HOWEVER depending on the breeders lines there *may* be a non extension gene hiding in that black. The non extension gene will give Torts if two of those suckers get together!!

 

[Kyle@theWintertime]

Castor is Black agouti! Red is non-extension agouti....a black rabbit will only have self, so no worries there; HOWEVER depending on the breeders lines there *may* be a non extension gene hiding in that black. The non extension gene will give Torts if two of those suckers get together!!

Hmm, that could be a little problematic. Well...if I get a tort, I'll call it bad luck and cull. :x

Thanks!

 

[Jack]

NO, you have a tort, and you can bread it 2 ways

Test, if a black has a non expressed extension, you will get torts in the litter
quality, bread it to blacks, you are assured at least half the litter is Castor
E e
E[EE] [Ee]
E[EE] [Ee]

No reason to cull, like my wife's REW, she just passes them on to a lady who does REW, too much of a pain to try to cull it out of her line, and too much quality would be sacrfied to do it.

 

[skysthelimit]

Breeding a tort to black will not get you castor. As an agouti, you have to be agouti to carry agouti. A tort does not carry the A_ gene necessary for agouti.

For the broken champagne program, you will probably want to cull any torts, because they will add nothing to what you want to achieve.

 

[Kyle@theWintertime]

For the broken champagne program, you will probably want to cull any torts, because they will add nothing to what you want to achieve.

That's my thoughts exactly.