Reptile & Amphibian Forums

So as I'm preparing myself for next year, my first attempted pairing, the question of genetics keeps popping in my head. (I'm really just trying to learn as much as possible within the next year) With Mitchell being a bulls-eye, essentially a type of reduced pattern could he potentially produce a pearl, more radical reduction, even though my female is "normal". However, the chances of a pearl would be much better when I'm able to breed back one of the female offspring. I guess I'm just wondering if I'm on the right track with this sort of thinking- the reduction of crescents (ie bulls-eyes) can be accentuated through select breeding, or is it just a genetic anomaly that I’m going to have to hope for?
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Best Wishes
Paula

BRB 1.1 (cbb)- Mitchell and Carman
Fiance` 1.0 (w/c and bites) Evan

There is a very small chance that you will get a pearl from a bullseye and a normal. It would really depend on the lineage of your pair. If they had a strong history of bullseyes in the line, or even pearls then you have a much better chance. Breeding an offspring back will increase your chances, but in my experience the pearl is a finicky "gene". I've bred a pearl x pearl and still had a couple normals in the litter.

Also, not sure what you mean by pattern reduction. I would think it would be more of an increase in the crescent to create a bullseye.... unless you mean eclipse?

Got any pics of your pair?
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Aubrey Ross

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www.SlipstreamSerpents.com

Hi Paula, If I've connected the right dots, Mitchell is my VI-RH-0906.

Vivian and Rhett are not directly related to the pearl line. I had one baby from last years pairing that approached the pearl visual look:

I would not expect pearls from your bullseye x normal pairing. Not that it's impossible, just improbable. It would be more likely for some qty of bullseyes and/or thick crescent babies.

So far the crescent variations seem to be line bred, not single gene mutations.

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Thanks,

Dave Colling

www.rainbows-r-us-reptiles.com

0.1 Wife (WC and still very fiesty)
0.2 kids (CBB, a big part of our selective breeding program)

LOL, to many snakes to list, last count (02/01/2010):
42.61 BRB
27.40 BCI
And those are only the breeders

lots.lots.lots feeder mice and rats

Paula,

I think it is pretty well accepted that the “pearl” phase is a line breed or polygenic trait. Unlike the Mendelian genetics that people are use to thinking about (one gene for one trade, common in ball pythons) polygenic traits are difficult to predict with any certainty. Personally I only know of 3 proven Mendelian trait associated with Brazilian rainbow boas; albino, hypo. and anery. There could be a few more but there is still lots of work to be done before anyone can say for sure. So anything else you see out there that maybe interesting to you assume that it is a polygenic trait. With that said it is best if you try to acquire animals for that bloodline. DISCLAIMER; do some out crossing before to much inbreeding goes on…

If you are trying to learn about genetics I would suggest you read up on Gregor Mendel as well as modern genetics.

John Wiseman

AFAIK, there are only two fully proven and documented genetic morphs in BRB's, Sharp line Anery and Lockwood (EBV) line Hypo. There are also Seib line Anery and Bell liny Hypo which I am unsure of how far they are in the proving stages.

The Albino BRB owned by Outback reptiles is not proven at all yet. So far all that has been produced are visually normal offspring. I do believe the trait will prove out but to date no further albino's have been produced.

Several other things in the semi proven and unproven stages.....

One supposedly proven dorsal stripe line at Susquehanna Ectotherms.

Several projects I'm working on.....

Lateral stripe - one apparent line in the beginning stages - Ozzy x Harriet. Also have a similar wild bred offspring being raised up now.

Calico - several litters of offspring produced, raising them up now.

Couple other projects I'm working on....

And I know there are other projects like dark phase and abberent being worked....

>>Paula,
>>
>>I think it is pretty well accepted that the “pearl” phase is a line breed or polygenic trait. Unlike the Mendelian genetics that people are use to thinking about (one gene for one trade, common in ball pythons) polygenic traits are difficult to predict with any certainty. Personally I only know of 3 proven Mendelian trait associated with Brazilian rainbow boas; albino, hypo. and anery. There could be a few more but there is still lots of work to be done before anyone can say for sure. So anything else you see out there that maybe interesting to you assume that it is a polygenic trait. With that said it is best if you try to acquire animals for that bloodline. DISCLAIMER; do some out crossing before to much inbreeding goes on…
>>
>>If you are trying to learn about genetics I would suggest you read up on Gregor Mendel as well as modern genetics.
>>
>>John Wiseman
>>
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Thanks,

Dave Colling

www.rainbows-r-us-reptiles.com

0.1 Wife (WC and still very fiesty)
0.2 kids (CBB, a big part of our selective breeding program)

LOL, to many snakes to list, last count (02/01/2010):
42.61 BRB
27.40 BCI
And those are only the breeders

lots.lots.lots feeder mice and rats