The Carpet Python Guide Thread
As carpets are becoming more and more popular, more and more people are asking about the genetics behind the morphs.
Hopefully this will help
I have added photos where I have access to them without breaching any copyrights, perhaps others could fill in some of the gaps
OK so lets start with the sub-species.
Carpet python is the general name given snakes within the species Morelia spilota. Within this group there are the following sub-species.
spilota - Diamond Python
mcdowelli - Coastal
harrisoni - Irian Jaya
variegata - Darwin
imbricata - South Western Carpet
metcalfei - Inland Carpet
Subspecies do get re-classified in and out of the group from time to time Bredli used to be part of the carpet python group, but have now been re-classified as a seperate species, Morelia bredli
And so onto the morphs
Single gene mutations
Jaguar - Probably the most well known of the carpet python morphs, which originated in the coastal carpet python. The Jaguar gene give an high yellow background and a distinct patternation.
The method of inheritance is co-dominant, the super form of Jaguar is leaucistic, unfortunately all attempts of producing a leucistic have failed, with 100% of leucistic offspring, failing to hatch or dying shorty afterwards. The neurological problems associated with the jaguar morph are well documented, this can range from basically nothing, to a severe lack of co-ordination, and to one level or another affect a good number of jaguars, athough it is most noticable in stressed or excited individuals.
The Jaguar gene has been crossed into pretty much every other subspecis, hence jungle jags, irian jaya jags etc.
Caramel - Basically a hypomelanistic form, reducing the amount of melanin (black pigmentation) in the colouration. Originating in the coastal carpet.
Method of inheritance is co-dominant, however similar to hypo boas, the standard caramel and the super caramel are very difficult to tell apart.
Zebra - A pattern mutation originating in jungle carpet python.
Method of inheritance is co-dominant, the super form is a patternless snake. The super form can have issues with kinking in the tail, however it is reported that this is eliminated when adding a second morph into the mix.
I don't have my own image of a super zebra
Axanthic - As with all other axanthics this is a mutation that lacks yellow pigmentation. Origination in coastals.
Method of inheritance is recessive.
Albino - As you would expect this mutation has no melanin so no black pigmentation. Originating in darwin carpets.
Method of inheritance is recessive. It appears that albinos take longer to reach sexual maturity than most other carpets, although there doesn't seem to be any real reason for this. Pure Darwin albinos do seem to have some issues with non-feeding hatchlings and a few other issues that pop up. IMO its best to go for albinos that have been crossed out into otehr sub-species.
Granite - A pattern mutation originating in Irian Jayas.
Method of inheritance is recessive. Visual Granite x Granite pairings can give issues with kinked offspring, so best to put Granite x het granite.
Tiger & Tri-stripe - pattern mutations, both giving striped appearance.
The method of inheritance is not simple, it doesn't seem to be a single gene at work, but also is not quite polymorphic.
Double Mutations to follow
Last edited by bladeblaster; 06-02-2012 at 09:20 PM..
Ok so onto double moprhs, this could be a long list, but I will stick mainly to those that have been done, and those that are most interesting to come.
Granite Jaguar - The name says it all really, produced by breeding a jaguar with a granite, holding back a jag het granite and breeding that back to a granite.
Zebra Jaguar - Again pretty self explanatory, produced by breeding a zebra with a caramel.
Caramel Jaguar - Caramel bred with a Jaguar
Albino Jaguar - Produced by breeding a jaguar with an albino holding back a jag het albino and breeding back to an albino
Axanthic Jaguar - I think you get the idea by now
Still to come
Sunglow - Caramel x Albino
Snow - Albino x Axanthic
as well as a few other, exciting times are a foot
The only triple combo I know of at the moment as this:-
The Caramel Zebra Jag
Luckily there are many more to come
I hope that this thread is of use to someone, any comments, corrections, additions more than welcome.
Please also feel free to ask your own genetics questions
Super caramel jag
Super caramel zebra
Caramel zebra jag
Granite zebra jag
Super caramel zebra jag
The lists are pretty endless for those with the time and the animals
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