Mystery harlequin - please help! Puzzled!

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sryglet

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Hello! I joined the forum because I breed harlequins and got a baby in a litter last year that makes absolutely no sense concerning my knowledge of rabbit genetics. We know the parent's lineage is correct on her pedigree and the color she is makes absolutely no sense!

Her dad is our black Japanese. Her mom is our lilac Japanese, born to our other lilac Japanese. She was back bred to her dad, meaning this baby's father and grandfather are the same rabbit. His parents were a lilac Japanese buck and a black japanese doe. Her mother's parents were black Japanese buck and a lilac Japanese doe. All rabbits in both parents pedigree are either black or lilac Japanese.

Her parents' pairing has produced 37 babies, all black, blue** (edited to correct) and lilac Japanese. Dad has produced over 200 babies and none had any white on them. Dad doesn't have any white on him. There is a zero percent chance that mom has ever been around another buck unless someone snuck a different buck into our rabbit run and he only managed to get one kit into a litter of 9 otherwise very obviously harlequin babies, and I'm pretty sure our dogs wouldn't let that happen on top of how weird that would be.

This baby was born pure white and developed small light and dark grey spots on her body, ears, and nose by weaning. Her grey spots have come in more and more over time - for instance, she did not have the smaller markings around her right eye until a few months ago and the markings around her nose have grown and darkened significantly over time. If that isn't perplexing enough, she has now begun developing pale fawn markings on her ears, nose, feet, and body at 6 months old (as you can see here), which are rapidly coming in now at 7 months. As you can see from some of the photos, she is beginning to develop darker fawn bands on her ears. Her ears were pale grey with absolutely no orange two months ago. I bathed her with whitening shampoo because I was certain it wasn't possible that these pale fawn markings were real, but they are definitely genuine coloration. I am absolutely perplexed about the presence of all three colors on her, as well as the fact that the spots appear and multiply over time. She's also smaller than any other kits we've produced and has a very masculine head shape.

Any clue as to what's going on? We sell show quality harlequins and I would be mortified if someone ended up with whatever this is in one of their litters from our stock - not that she isn't beautiful! We've sold a lot of babies and no one has ever reached out saying they got a random off-colored harlequin in their litters.
 

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Last edited:
Hello! I'm the person that told you to post here from Reddit.

I did some extra digging, and found someone that (purposefully) got a similar rabbit by crossing a harlequin with a broken sable colourpoint (Link and pictures here) A sable point would be aa__chl___ee, and the parts that matter here could perfectly have been hidden in your pure harlequins, and just take a lot of luck to get combined in the correct way to give this doe.

So the sire is black japanese and the doe is lilac japanese.
The mystery doe has for sure at least one harlequin gene, and seems to be blue (Are you REALLY sure that you got "all black and lilac" on the other 37 kits? Blue is much more probable than lilac with a black sire. They may be all black and blue.). This gives these genotypes:
Sire: <__B_C_Ddej_>
Dam: <__bbC_ddej_>
Mystery doe: <__B___ddej_>

As you can see, there is plenty of space in there for mystery genes on the parentss, especially for dad.
I am NOT an expert and I do NOT know exactly which colour this doe is, but I think she may have chinchilla light (also known as sable, <chl>) and one non-extension gene <e>, and on top she may be a self <aa>.
If both parents have a recessive gene on the C locus, and only one has non-ex on the E locus, that would give you only a 12.5% chance of a kit ending up with both things. If some other thing like aa is needed for this, the chance would be even smaller. Accounting for the luck of the draw it doesn't seem wild to me to see this for the first time after several pairings.

Still, it would be awesome if someone with more experience can give their opinion. @Alaska Satin sorry for summoning you but I'm very curious now, do you have a clue what may be happening here?
 
This is mom. Dad passed away unexpectedly a couple months back when his enclosure was crushed by a tree during a storm, and I am trying to find more recent pictures of him where me or one of my kids aren't holding him.
 

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Also to address the above, I copied and pasted a lot from the original post on my phone and had left out blue. We have had a lot of blue Japanese babies. I edited it to fix the mistake!
 
I dont have pictures of all of them, but these were some of her litter mates as babies.
 

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