Reptile & Amphibian Forums

Has there been any type of progeny predictor developed for any of the kings? We have one for corn snakes I guess because of so many different morph/combo's that are possible. I would assume that you would need a few simple recessive genes that are expressed visually in order to do this. I wouldn't think that kings have as many "morphs" as corns yet so maybe this is something that is still unknown.
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2.4 ball pythons
1.1 sand boas
1.2 corn snakes
1.0 southern plains rat
1.1 black rat snakes
1.1 Cali kings
1.0 western hog
1.0 wc eastern garter

Not that I'm aware of, though it isn't hard to figure out with some basic math skills for the recessive traits.

There might be some funny stuff with peanut butter in brooksi, it will be interesting to find out about that when it gets sorted out - but from what I've read, it seems to be recessive to normal but possibly codom with some other traits.

kerby is doing some projects with cal kings to produce some with multiple morphs, watch his posts to see some of the cal king possibilities with morph combinations.
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3.0 WC; 0.2 CB L. getula californiae
0.1 WC; 0.0.10 CH Elgaria multicarinata multicarinata

There might be some funny stuff with peanut butter in brooksi, it will be interesting to find out about that when it gets sorted out - but from what I've read, it seems to be recessive to normal but possibly codom with some other traits.

I don't understand how that could work. If it is one locus, and it is recessive, is someone implying that there are other loci at the same locus which are codominant?

Epistasis seems a more likely explanation. And the trait does appear to be sex-influenced.

I would love to see a confirmed but unbiased pedigree so we could at least have a realistic chance of figuring it out. Anyone have any good records for this trait?
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Chris Harrison
San Antonio, Texas

>I don't understand how that could work. If it is one locus, and it is recessive, is someone implying that there are other loci at the same locus which are codominant?

Short answer: Not other loci. More than two alleles at the same locus.

Dominant, codominant, and recessive all require a comparison. This can be specified or implied. When there are only two alleles, then the comparison is between the mutant and normal alleles. For example, in the ball python, the pied mutant gene is recessive to the normal allele. "The pied mutant gene is a recessive" is an implied comparison meaning the same thing because there are only two alleles.

If peanut butter and albino are alleles, then there are three possible comparisons: peanut butter vs normal, albino vs normal, and peanut butter vs albino. From what I've gathered, a snake with a peanut butter mutant gene paired with a normal allele looks normal; therefore, peanut butter is recessive to normal. A snake with an albino gene paired with a normal gene looks normal; therefore, albino is recessive to normal. The belief is that a snake with a peanut butter gene paired with an albino gene looks more or less intermediate between a homozygous peanut butter and a homozygous albino. This is why people are suggesting that peanut butter is codominant to albino.

Welcome to the wonderful world of multiple alleles.

>I would love to see a confirmed but unbiased pedigree so we could at least have a realistic chance of figuring it out.

So would I.

Paul Hollander