Reptile & Amphibian Forums

I forgot to mention that not only did my brother and I produce the Rusty on the right from a leucistic parent, but we actually got 12/12 Rusty rats in the clutch. A 100% ratio. When I figure it out, I will let ya know. Got any ideas?

The Het. Leucsitic Ball Pythons, Rainbow Boas, & Black Ratsnakes are a lighter version of the wild-type. Het. Leucistic Black Rat = Rusty.....

Or the leucistic parent could have also been a rusty (how would you tell?) and the other parent could've been a het. Not that this doesn't rule out something else going on, but it wouldn't be the first time the odds came out in an interesting clutch...

If in fact, the Rusty was a Het Leucistic, then when you breed any two Rusties together, you should get a percentage of Leucistic, right? Only once have I seen a Leucistic pop up in a Rusty x Rusty cross. I am leaning towards the Rusty trait possibly being a selectively recessive trait. I am currently worknig on a few projects to further examine this. I spoke with Darin Bell about it a bit, and he seems to think I may be on the right track with it. I guess time will tell.

I have Dbl. Hets. for Licorice Stick & Leucistics which are all Rustys (mostly chocolate brown w/ orange eyes). I get Leucistics when I breed these together. I also get Rustys & wild-type animals. I assume the Rustys are the 66% PH Leuc. animals that are in fact carrying the Leuc. gene. I know Mark Bell's Het. Leuc. Black Rat stock are all Rustys. I know Darin has also produced Rustys from his Leuc. line as well as the Sunglow Albinos which I believe are Albino Rustys.

can be bad odds. How many times have you bred the Rustites together & mnot gotten Leucistics. The 1/4 thing is just odds - it can go either way. I know a guy who bred an Albino Boa X a Het. - ut of 36 babies only got one Albino when it is supposed to be one in four. I have also seen it got the opther way. Dbl. Het. Snowball X Dbl. Het. Snowball = 3 eggs = 2 Snows when it is 1:16 odds.

I have bred Dbl. Het. Leucistic & Licorice Sticks (Rustys) together on at least six occasions & never gotten Licorice Sticks - got Leucys but no white-sideds & I produced the Dbl. Het. parents so I know the gene is in there = bad odds.

Thats right, the odds are only that - odds. I have a pair of het albino everglades and out of a clutch of 40 last year only two were albinos. Unfortunately you'll never get the white sided snakes out of that breeding as that is an autosomal recessive gene trait and the rusty trait will ALWAYS be dominant to it. For co-dominant traits you can think of the super version as having visual hets, in this case rusties are the visual het to leucisicm.

Sorry joliff I've just reread your previous post and I had misunderstood, I thought the white sided hets you had produced were leucistic, however I now see that they are rusties het for white side and yes they should in theory produce white sides. One thing that pairing does raise is the prospect of white sided rusties, as that can in theory occur, I wonder if the genetics would allow it to though...

Het. Leuc. Ball Pythons (Mojaves, Fires, Lesser Plattys, etc.) are lighter in colour than wild-types

Het. Leuc. Rainbow Boas are lighter in colour than wild-types

Het. Leuc. Black Rats (Rustys) are lighter in colour than wild-types

Your right I breed rusty X rusty and never to this day produce luecistic blk rats ..My big Question was the lighter rusty is he a marker for luecistic ?

P.s. Rusties blk rats is a co- dominate trait

As I understand it the rusty black ratsnake is a co-dominant trait. So as in pastel royal pythons you only need one parent to be a rusty to produce rusty babies, crossing two rusties leads to the super version of the trait which is leucistic, similar to the super pastel royals or the ivory blood pythons. This is different to the leucistic texas ratsnake with is a recessive trait.

The statistical odds from breedings work out at: Cross a normal to a rusty and you should get 50% rusty and 50% normal, cross two rusties and you should 25% normal 50% rusty and 25% leucistic, cross a leucistic to a normal and you should get 100% rusties.

I have just read the thread on this breeding further down the page and this is completely normal if you follow the genetics for this trait.

What happens when a Leucistic and a Rusty are crossed to each other. Mike, the other parent to the cross was a D.B. Sunglow (we also believe that it is an albino Rusty). So a Leucistic crossed to an albino Rusty gave all Rusties. Does this make any sense? I understand odds, but in terms of a Co-Dominant trait, the odds are no longer as easy to distinguish as a trait that is heterozygous. Then my next question is:
If you take a normal to a rusty, you will get 50:50 babies. If you then take two of the NORMAL ones and cross them to each other, will any rusties come of that? If so, doesn't this indicate that Rusty can be heterozygous?
What also doesn't make sense is where the first Sunglow came from. Darin said he took a baby from the ORIGINAL Leucistic's wild breeding clutch and crossed it back to mom. This is where the Sunglow came from.

What happens when a Leucistic and a Rusty are crossed to each other?

******= you should get 50% Rustys & 50% Leucistics.

Mike, the other parent to the cross was a D.B. Sunglow (we also believe that it is an albino Rusty). So a Leucistic crossed to an albino Rusty gave all Rusties. Does this make any sense?
******= yes, all the animals are Het. for Leucistic - that is why they are all Ruistys.

If you take a normal to a rusty, you will get 50:50 babies. If you then take two of the NORMAL ones and cross them to each other, will any rusties come of that?

******No - the normals do not carry any of the recessive genes for leucisim. If they did, they would be a Rusty. No Rustys would be present in the offspring as a result of the breeding in question because the Rusty is co-dominant (which is prob. not the actual def. to a geneticist but part of the vocab. of a snake breeder). In order top produce Rustys, you need a rusty or Leucistic as one of the parents.
Rusty X wild-type = 50% Rusty & 50% wild-type
Rusty X Rusty = 25% Leucistic, 25% wild-type, & 50% Rusty
Leucsitic X Normal = 100% Rusty
Leucistic X Rusty = 50% Leuc. & 50% Rusty
Leucistic X Leucistic = 100% Leucistic

If so, doesn't this indicate that Rusty can be heterozygous?

****** Yes - Rustys = Het. Leucistic

What also doesn't make sense is where the first Sunglow came from. Darin said he took a baby from the ORIGINAL Leucistic's wild breeding clutch and crossed it back to mom. This is where the Sunglow came from.

******I would have to check on the origins of the first Sunglow.?