Fixing the chin gene

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skysthelimit

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My breeder friend has been working to rid the chin line of blue/gray eye color, by selecting for brown eyes only. Quite successful, but now some chins are missing the midband.

And easy fix would be for me to just to breed them all back into my stock of chins, which will add back the blue/gray eye gene.

But I am curious as to why this may have occurred?
 
Do have a response that isn't derrogatory?
All things being equal, you can only work on one trait at a time, especially if you only have one problem to fix. Anytime a meat breeder selects for faster growth they are selecting for one thing, but they might lose milking ability, now why is that right in meat breeding but not in show?

But that is beside the point. I am interested in the genetic connection behind eye color in chins and anything else there is. Selecting for more rufus in Castors or wider bands does not change their eye color. So what is it about chins, and their accepted multi color eyes (that is not allowed in any other color) that changing the color causes changes in the coat?
What are the genetic differences between blue eye, gray eye and brown eyed chins? Not to mention I have brown eye chins with normal banding, so banding should not go away just because I breed them only to each other, and keep only the brown eyed ones, which have proper banding. They were selected for breeding without proper banding, just to get brown eyes. The mis marked ones popped out of a few generations of brown eye, properly marked rabbits.

The Chin gene does funny things.
 

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