I see your logic, but I still maintain that the leucistic is the super form of the rusty co dominant. As for those that have produced no leucistics from a season or two (or more) of rusty to rusty pairings, think of the odds of producing a leu from this. The chance of getting a leu is 25% in each egg. Add to this the bewildering fact that the gene that you want to produce will always be in the egg that goes bad in the incubator. We have all had this experience at one time or another with simple recessive or co dom. Below are my experiences with different pairings over ten years with no variation:

normal to rusty yields rusty and normals
rusty to rusty yields normal, rusty, and leucistic
rusty to leu yields rusty and leucistic
leu to leu yields only leu
leu to normal yields all rusty

Again, this never varied in the years that I produced this line. Of course, the ratios did vary, but that's what happens. I think you will find that this is what expected from a co dominant mutation.

Again, I welcome any input on breeding experience.

Derek
Cape Fear Reptiles

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