I'm not disagreeing with anything in that post, but I just use (er, try to use) different terminology.
I don't really consider albinism or lavender to be a "morph" because they do not change the pattern of the snake, like pied does is pythons, etc.
I like to use the word "phase" for what can be expected to be found in the wild, such as coastal banded or desert banded or striped. Morph I prefer to use with designer patterns that breed true. IE if you have spotted breeding true, it may technically be an abberancy but I would consider it to be a morph.
Black belly might be considered a "morph" but it apparently isn't that uncommon in certain populations. 50/50 I would consider a morph because it is very rare in the wild but breeds true.
If reverse stripe breeds true, I would consider that to be a morph.
Melanism is something I'm interested in. The Mendota and Davis kings look strikingly similar. If I'm not mistaken, both tend to be abberant with black bellies, and quite possibly the same gene or combination of gene. If I remember, Kerby is planning to do the cross to see if they are in fact the same thing.
I'd like to get a pair of Davis kings and outcross them with normal banded, selecting the most banded offspring and see if I can separate the hypermelanism from the black bellied abberant, but it was suggested to me by someone else that it may actually be a codom thing and not simple recessive.
I know that there are melanistic Conjuncta kings (I don't think Conjuncta is still recognizes as a separate subspecies) that are banded melanistic, it would be interesting to cross them with a "normal" banded and see what happens. I think f1reptiles breeds/carries them. It would be interesting to see wether or not it is the same melanistic gene that davis/mendota has, and if not, what a king that expresses both of them looks like (IE if it looks super hypermelanistic ...)
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One thing I want to try and selectively breed for is an extension of the banded phase, where the cream bands only go halfway around. Just looking at banded kings, it looks like the way cream bands are formed, they start going up the side and then streak across the back, often diagonally to the axis, to meet another cream band from the other side. Sometimes two cream bands meet the same cream band on the other side, making a sort of Y. Sometimes they don't meet any bands on the other side, making the zipper pattern.
I don't know if it is genetic, incubation conditions, or both, that causes the zipper pattern I want to try and reproduce down the entire length of the snake (so that there are no complete cream bands).
I've noticed that in general, it seems captive bred babies I see at shows show far more zipper than wild cal kings I've found. That could indicate it is incubation, or it could indicate that it is a trait that inbreeding (line breeding) increases. I don't know.
If I'm succesful and produce a line of Cal Kings that "breed true" zipper, banded individuals without a single complete cream band, would that be a morph - or is it just an extension of the naturally occuring banded phase?
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3.0 WC; 0.3 CB L. getula californiae
0.1.1 WC; 0.0.3 CH Elgaria multicarinata multicarinata