Background:
Further down in this forum, under the label "Leucistic Amelanistics," Paul Hollander & I have been having a discussion about tyrosinase positive and tyrosinase negative genes in Pantherophis spp. In particular, as these genes relate to P. g. guttata, and P. o. obsoletus.
Co-incidentally, similar discussion has arisen in the Hybrid Forum. I'd appreciate anyone interested in this topic taking a look at the discussion I've been having there with ChrisK, starting with his post:
http://forums.kingsnake.com/view.php?id=35169,35169
My response to his post is at:
http://forums.kingsnake.com/view.php?id=35169,79239
and has resulted in the following exchange between ChrisK and myself:
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I've given you the explanation that fits with the information I rec'd from Paul Hollander. I'm sure he told me that the T-neg that is found in the amel guttata IS at the same location as the T-neg found in the obsoletus, but that corns do not possess the T-pos mutant gene.
If this is incorrect, can you please cite sources to which I may refer to ensure that I have the correct information?
>>Trish,
>>I think you might have it a bit sideways here.
>>
>>The T-negative gene in obsoletus and guttata are on different Allels. Both the Amel corn and the Amel Bubblegum are T-negative amels. The T-neg amel gene in Corns doesn't mix with the T-neg gene in obsoletus. So in my self named "Beelzebub Rat" you could breed them to either obsoletus or guttata and get albinos. Or, you could breed them together and get Two forms of T-neg amel expressed simultaneously.
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ChrisK has since given me the following response:
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I don't have any resource material to quote from. All I have are the offspring from parents of known genetic background. Maybe you can have Hollander look at this thread and give his input?
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Since I don't have sufficient familiarity with the genetics of tyrosinase production in these animals, I'd really appreciate having someone provide me with a definitive comment on my interpretation, correcting me if I'm wrong, and (if possible) providing me with some sources of reference studies.
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tricia
