More genetic help with mini rex??

[joybellfarm]

Ok Firecracker who is a broken black just had a litter of 5 we lost 1 but 4 are left. 2 broken blacks a broken tort and a black. Per a recent post Dood said she probably is aa B_ C_ D_ E_ ENen (could carry chocolate, chin or himilayan, dilute and non-extension/tort. Firecrackers dam is broken black with mostly black, blue, chocolate on 1 side and the other is chin and Himalayan her siblings have had torts so the tort ggsire way back is coming out in litters. I was told to bred her to a tort. Well i dont want torts so could i breed her to a Black or blue buck? Im breeding black, blues, chocolates and someday otters in all those colors i hope lol. Dont have room to start a tort line. She has a good personality and would love to keep her. So what can i breed her to? Im going to be sending her back to my friend where she came from to be bred as i only have he brother and a black otter buck. I dont want to bred her to her brother and ive been told since she carries tort i should not bred to the otter. So she should be ok to bred to a black or blue right?
Know her brother should have the same genetic makeup so is it good to bred him to my chocolate does? Im just surprised this tort is coming out. My friend has there dam and never had torts out of her but all her kits she kept back are throwing at least 1 tort per litter. So where waiting on my chocolates to give birth to see any more torts pop out. Its such a mystery lol.
So Question 1 is what is ok to bred to my rabbits since they carry tort and question 2 for you awesome genetics peeps how the heck can torts come out know 4 generations later??

 

[PSFAngoras]

Breeding her back to another self should get you more selfs primarily, but if they carry the recessive extension gene then you'll see a few torts in the litter.

As far as breeding her to her brother, the brother may not have the same color genetic pattern that your doe has. That's why we see so many different colors in the same litter. It's basically like stripping down all the available genes and throwing them in a mixing pot and each kit gets to 'draw' genes for each locus. Just because your doe carries the gene for tort doesn't mean her brother does. It's more likely that he does, but its not a guarantee.

Say I breed two blacks together that carry chocolate. Chocolate is a recessive, so black will always mask it, meaning that you will have a black rabbit with the chocolate gene that may be passed on. Each parent donates copies of its genes for that locus, but kits only receive one gene from each parent, so they could receive either two black genes (a black rabbit) two chocolate genes (a chocolate rabbit) or one black gene and one chocolate gene (a black rabbit carrying chocolate). The same litter can have three variations on just that locus alone, and that's only one of many loci!

That not only shows how the litter can vary genetically, but also how your tort (extension) gene is working. That chocolate gene that is being carried, but masked by black, can easily be passed down, but won't show unless you get it paired with another chocolate gene, much like your extension gene.

 

[joybellfarm]

Hmmm interesting so the tort should only pop up if the doe and buck are carrying it? If so this is interesting as the buck to her kits have no tort unless its 4 generations or further back.
The brother carries it as he bred 3 of his sisters accidental breeding and everyone had a tort in it lol. Well im guessing he does lol could have came from the does i guess.

 

[PSFAngoras]

Recessives have to be carried by both the buck and the doe to show up in the kits, and they can hide for several generations undetected.

The good thing about that is when you know a rabbit is carrying certain recessives you can use that rabbit to test breed others. I have a doe who is a REW, which without breeding just shows up as a - - cc - -. By checking what she throws with what my bucks are, I was able to find out exactly what she is genetically!

Once you get into the genetics it can become addicting. I've only been into it since July, and I have already learned so much, and keep learning! It's awesome!

 

[joybellfarm]

Sorry MamaSheepdog im horrible at spelling. If it was not for spell check there would be a lot more lol. I nearly failed English every yr in school.
Ok so i was telling my friend about the Recessive gene and what confuses us know is Ada is firecrakers dam and has a tort way back has never produce a tort with Houdini in the 2 litters she had by him. But firecracker did have 1 little tort by him. So is she not caring the Recessive gene even though she has a tort? She was the one we thought the torts where coming from.
Sorry for all the questions this is so interesting.

 

[PSFAngoras]

Just because Ada has a tort in he background doesn't mean she carries it. It makes it more likely that she would, but she may not have gotten that gene.

It is possible that Firecracker got the gene from her sire, not her dam. Even if tort isn't on his pedigree, it doesn't mean that it couldn't have been hiding in the background somewhere.

 

[joybellfarm]

Ok thanks were where thinking that but was not sure. Ive been doing lots of research and found a ton of info and i think im learning a little about genotypeing the buns