Quote:
Harlie is like the
tortoiseshell gene in cats, in that it produces areas in the coat that look like "self" coloring (black) and other areas that look like the work of the "non-extension" gene (orange). The biggest difference between the two, of course, is that the cat's version of this gene is located on the X chromosome, so tortoiseshell and calico ("tortie and white"
) are generally only seen in females. In the rabbit, harlies can be of either gender. I have been breeding Harlequin rabbits and tricolor Mini Rex for -oh- about 20 years, so this gene and I are well acquainted!
Harlequin falls in the E-series. It is given the designation "e sub-h" (eh). It is recessive to the normal, full color E, and dominant to the non-extension e. Tort, orange, fawn, are all non extension colors. If you bred a (eheh) harlequin to any of the non-extension colors, all of the F1 generation would be harlequins (ehe). The tricky part about breeding for tri's is getting roughly equal parts of black and orange in the non-white areas. I had a rabbit once that I thought was a broken orange, until I looked really closely. He had two spots near his right eye, about as big as this > O that were black. Genetically, this rabbit was a tri! Tri's aren't hard to breed for,
good tri's, well, that's a different matter! I have long believed that my rabbits put their heads together in the wee hours of the morning and say, "How can we drive her crazy today?!" Not giving me the color/pattern I'm looking for is one of their favorites!
When I said that Harlequin is an Agouti color, I was referring to the A-series. There are 3 genes in the A-series, A (agouti pattern), at (tan pattern), and a (self pattern). Because the tan (at) and self (a) patterns concentrate the black pigment in the shorter hairs on the "points" of the animal, harlequin patterned rabbits that have self (aa) or tan (at_) at the A locus tend to be "smutty" on the nose, ears, etc. If you want "good" harlequins, they need to have (A) agouti setting the pattern in the A locus. I had an animal once, that was trying to be a tricolor, but was actually just a broken tort. It had really dark shading on its sides, and the way it did the broken pattern, that shading was isolated in little spots. At first glance, it did look like a tri, but I wasn't fooled!
Perhaps the reason that you were told not to breed harlequin to agouti is because of the Eeh offspring. The dominant E means that they will have the normal agouti-type coloration that the (A) calls for, with the white belly. Even though eh is recessive to E, its influence apparently can "bleed through" the dominant coloration. I have had chestnut (
not the preferred castor [sigh]) Mini Rex that had shadowy darker blotches on their coats, and hints of barring on their bellies (can we all say, "DQ"!!!) If you are looking to show your rabbits, you'd want to avoid combinations that would result in more unshowable offspring. Because self patterned (aa) animals have black all over, you wouldn't see the harlequin bleeding through. It might or might not show up on a tan, depending on just where in the coat the black patches were.