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Old 02-24-2012, 03:08 AM   #1
athelard
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Default How does a winter white dwarf with both the marbled/merle and pearl genes look like?

A hamster with the marbled/merle gene from only one of the parents will be a marbled/merle, because the gen is dominant.

A hamster with the pearl gene from only one of the parents will be a pearl, because the gen is dominant.

A hamster with the marbled/merle gene from both of its parents will be a marbled/merle.

A hamster with the pearl gene from both of its parents won't be born, because the gen is lethal when inherited from both of the parents.

So what would happen to hamster that has the pearl gen from a parent and the marble/merle from another? Will it be pearl, marbled/merle, a combination or it won't be born? Or something else completely different?

Thank you for your answers.
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Old 02-24-2012, 09:13 AM   #2
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Default Re: How does a winter white dwarf with both the marbled/merle and pearl genes look li

I have asked someone more knowledgeable than me on this subject and some of the judges suspect they have seen these at shows. They look like pearls but have patches of 'ticking' that go right down to the roots.
Responsible breeders in general have been VERY careful to keep the two genes apart, as it would be quite a nightmare to split them back apart.
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Old 02-24-2012, 11:57 PM   #3
athelard
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Default Re: How does a winter white dwarf with both the marbled/merle and pearl genes look li

Thank you for your answer.

I don't understand why is it so necessary not to breed them together. To separate the two genes again if necessary should be very straight forward.

The only kind of hamster with mixed genes would be the one with Pearl gene from one parent and Merle from the other. Separate the genes would be as simple as to breed that kind of hamster with one agouti. Since the agouti pattern is recessive against both pearl and marbled pattern, you'll know for sure that the agouti hamster will have agouti patter gen from both the parents, in other case it wouldn't be agouti. That pairing would get you a litter of approximately 50% pearls and 50% marbled, each pup with agouti patter gen from the agouti parent, and marbled or pearl gen from the mixed gen parent, and none of them would have both marble and pearl genes.

Even if you have doubts if your hamster have the two genes or just one, breeding it with a pure agouti will give you the answer. If all the pups are either agouti or pearl, that's the gen of your hamster. If you get pups of both types, your hamster has the two genes.

Is it something wrong with my reasoning?

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Old 02-25-2012, 02:09 AM   #4
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Default Re: How does a winter white dwarf with both the marbled/merle and pearl genes look li

Practically though it is hard because a marbled hamster can look very like a hamster half in winter coat and you get various versions of good and bad marbled agouti and pearl animals.
Genetics may say you get certain numbers statistically but it seldom works that way.
A pearl with both patterns may have just 3 hairs for example showing as the marbled gene so how likely are you to spot that?
In theory it may be easy but in practice it would not be easy!
I don't breed Winter Whites but the person I asked is a breeder and a judge as well as a geneticist.
If you were going to show the hamsters you would not want to mix the patterns anyway so it is probably not really something a breeder would do intentionally therefore there will not be many mixed patterns around in the pure winter white lines.
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Old 12-17-2012, 04:24 PM   #5
jesselle
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Default Re: How does a winter white dwarf with both the marbled/merle and pearl genes look li

Sorry to bump an old thread but my Coco has a marbled mother and a pearl father...

I've not seen her closely yet as she's still getting used to me but she's classed as a sapphire pearl.
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