That's not exactly accurate. While it is true that it is unfortunate that the name "Miami phase" was chosen to describe the animals in question, that is exactly what happened when Rich Z. promoted the color phase he found in the Miami area.
The color phase, as defined now, is identified in animals that have red-brick saddles on a gray-to-silver ground color. The best examples will have little to no yellow/orange coloration at all, and many people prefer the best animals to have thick black outlining around the saddles.
The Miami phase corn is every bit the color phase as is the Okeetee phase corn. I dislike the use of locality names for color phases as much as the next person, but saying they do not exist under those names is like everyone trying to ignore the 400 lb. gorilla in the corner of the room. It ain't happening.
Finally, Kat is right (as usual!). The Miami phase is a line bred effect and not the result of a simple recessive trait. An animal cannot be het for miami anymore than one can be het for okeetee. Both color phases are merely variations of normal, which may or may not have any links to any specific locality, regardless of their names.
Hope that helps a bit ...
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Darin Chappell
Hillbilly Herps
PO Box 254
Rogersville, MO 65742