Genetic question about breeding...

[Andrea S]

Hi,

this year I bred a pastel motley female to a hypo male.
The result of the breeding is:
-2 perfect moltey
-2 perfect striped
-1 perfect moltley striped (first half of the body is perfectly motley patterned, 2nd half of the body is perfectly striped).

When I write perfect I mean that the pattern is the typical pattern of motley or striped specimen.

According to my genetic knowledge the offsprings should have been all hypo het anery.
Apart the motley or stiped long debated question, the offsprings are all normal looking, not hypo...

Can anybody help me to understand these genetic questions?

Sorry for my very poor english...I'm italian.

Thanks and rgrds,
Andrea.

 

[limey]

the very obvious and simple answer is that the female is a different type of hypo to the male (there is deffinately two types of hypo maybe more) and or the pastel female isnt hypo- motley does seem to eliminate alot of black and so it could have been misidentified when it was sold to you (obviously if you bred it yourself then you will know its genes) and finally not all hypos hatch looking like hypos

Thats my thoughs anyhow i dont doubt some poeple will have a fuller answer for you

 

[CAV]

Without seeing a picture, I'd venture to guess that the "Pastel" female could possibly be just a light colored Anery. This would explain the Normal colored offspring.

If you want to really stretch the hypothesis:

If the Anery female is homo Striped/Motley and the Hypo male is het Striped/Motley, the outcome would be:

50% Striped Motley, het Anery and Hypo (Ghost)
25% Motley, het Ghost
25% Striped, het Ghost

That is fairly close to what you are observing. Of course, this is purely speculation........

 

[Darin Chappell]

Firstly, a lot of pastel motlies are simply motley anerythristic animals, and are called pastel because of their coloration, NOT because of the presence of any of the hypo genes. So, just because she is a pastel motley, I would not necessarily expect her to be homo for hypo too. That explains the "normal" versus hypo question.

As to the motley versus striped question, the female must be motley or striped/motley (showing very little striping, as you've described her), and the male is het for motley OR stripe. He cannot be het for both, or he would be a striped/motley, and he would show the necessary phenotype, because the striped and motley genes are both found at the same locus.

There has been a great deal of discussion about what constitutes a striped animal, and it seems to me that a lot of stripe/motlies are inaccurately being identified as striped ones. That may be the case here too, but without pictures, it would be really hard to say one way or the other.

 

[CAV]

To illustrate Darin's point

This is my Butter Motley. As you can see, the pattern looks like there is some stripe influence. However, I have been assured that there is no genetic stripe influence present. This is just a long motley pattern.

 

[Andrea S]

Thanks!

Thank you very much for all your replies.

As soon as I'll snap few shots to the hatchings and its parents I'll post the pics.

Bye,
Andrea S.