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#442364 - 12/31/07 10:04 AM Genetics and coloring questions and one idea ;)
NickieDo
Unregistered


Ok, Color genetics are a completely new things to me in sugar gliders. I do know a LITTLE about breeding for color in horses though, so it can't be too far different.

I was reading about the leus and outcrossing them can someone explain the 100% 66% and 33% leu het...how do you know the percentages of an animal that is a standard color?

Does 33% mean that there is only a 33% chance that it carries the gene OR only 33% of the offspring produced will in face have color if paired with a leu or a 100% leu het?


I know that in horses Overo to Overo (a color pattern) can produce whats called Lethal White syndrome 25% of the time, which is fatal, so in horses there is no such thing as a homozygous overo, b/c the gene is fatal. Does this apply to suggies with any color pattern (more specificly Mosaic or leu)?

Now an idea...
When I had horses and needed to test for genetic factors or homozygosity I sent hair and or blood samples to UC Davis, now they also do dogs/cats/cows/llamas etc. My Idea was that it would be neat if we could have them do genetics on gliders. http://www.vgl.ucdavis.edu/

-Nickie-

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#442373 - 12/31/07 10:08 AM Re: Genetics and coloring questions and one idea ;) [Re: ]
Owndbymyfurballs Offline
Glider Guardian

Registered: 09/18/07
Posts: 883
Loc: Kansas
The percentage is how much of a chance that glider has of carrying the gene in question. For example...

100% het = 100% chance that they carry the gene to produce that color IF properly paired

60% = 60% chance that they carry the gene to produce that color if properly paired

The rest someone else will have to answer for you. I don't breed for leus or anything like that, so I don't know too much else about them.
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Becci
Owned By My Many Furballs And Loving It!
~Loving My Glider Crew Since 2004~

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#442409 - 12/31/07 11:13 AM Re: Genetics and coloring questions and one idea ;) [Re: Owndbymyfurballs]
NickieDo
Unregistered


If you bred a leu het to a normal grey, what's the probability that their offspring will also carry the gene?

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#442415 - 12/31/07 11:20 AM Re: Genetics and coloring questions and one idea ;) [Re: ]
glidergrl1513 Offline
Serious Glideritis

Registered: 12/21/03
Posts: 5725
Loc: Upstate NY
The joeys would definitely carry the gene for leu, in that case. (Since the leu is homozygous for the gene, and the gray does not carry it, it would get one allele for the leu and one normal one)

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#442420 - 12/31/07 11:37 AM Re: Genetics and coloring questions and one idea ;) [Re: ]
BeckiT Offline
Glideritis Anonymous

Registered: 09/29/06
Posts: 16083
Loc: Manitowoc, WI
Originally Posted By: NickieDo
If you bred a leu het to a normal grey, what's the probability that their offspring will also carry the gene?
Depends on the percentage leu het you breed to wink Without a leu in the mix, you will not definitely have the leu gene in there, only a chance that it's present
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So You Want to Own a Sugar Glider? Read and Share wink

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#442421 - 12/31/07 11:42 AM Re: Genetics and coloring questions and one idea ;) [Re: BeckiT]
glidergrl1513 Offline
Serious Glideritis

Registered: 12/21/03
Posts: 5725
Loc: Upstate NY
Oops, sorry, I thought you said leu! I didn't see the het..never mind blush

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#442424 - 12/31/07 11:46 AM Re: Genetics and coloring questions and one idea ; [Re: glidergrl1513]
NickieDo
Unregistered


I was just trying to figure out where people were coming up with 66% and 33% leu het
and how do you know for a fact if a glider is 100% leu het?

*Also, are the WF and WT the same as far as genetic percentages? Or are they recessive?


Edited by NickieDo (12/31/07 11:48 AM)

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#442427 - 12/31/07 11:51 AM Re: Genetics and coloring questions and one idea ; [Re: ]
glidergrl1513 Offline
Serious Glideritis

Registered: 12/21/03
Posts: 5725
Loc: Upstate NY
WF and WT are still in the gray at this point. They don't seem to be as straight forward as leucistic or albino. I don't think that they are considered recessive, maybe codominant?

A glider will be a 100% het if one parent is a leu or if the glider "proves out" (produces a white joey). I think they may also be able to be a 100% het if one of their joeys produces a white glider, in some cases, but I'm not sure on that.

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#442486 - 12/31/07 01:28 PM Re: Genetics and coloring questions and one idea ; [Re: glidergrl1513]
7glider7
Unregistered


As for lethal whites, I don't think that anybody knows. I have never heard anything of the sort, but I am not sure whether or not the leu breeders keep close enough records of the offspring to see if there seems to be a lethal white phenomenon going on with the mosaics or the leus.

I can tell you that most people do not breed leu x leu because at this point many of the leus are closely related and people are trying to breed the line out.

As for mosaics, I am not sure if anyone is breeding mosaic x mosaic. I don't know, but I doubt it...again, I would suspect not as they are very rare and many mosaics are from similar or same lines, and people are trying ot breed them out.

As for sending in samples to determine homozygosity or heterozygosity, to the best of my knowledge this has not been done at all. To the best of my knowledge NO genome work has been done on gliders, and for many of the genes, (such as white faced, white tip, etc) people are unsure of whether it is even a case of simple, single-gene locus with simple dominance/recessive inheritance pattern or a more complex, multi-gene trait.

For horses, there is a TON of money in breeding, which is why people can and will sequence the genomes and find genes related to color...there's money in it. It's likely nobody has sequenced glider genomes or searched for color genes because there just isn't the funding to support it.

Hope this helps! thumb

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#442537 - 12/31/07 02:29 PM Re: Genetics and coloring questions and one idea ; [Re: ]
NickieDo
Unregistered


Thanks for the reply Jen, Thats pretty much part of my question was the homo/heterozygosity of the leu/mosaic in relation to specific genes. (color and the sterility)

I know there is BIG money in horses as well as cattle and UC Davis was the only place I could think of that did genetic work for the public. They also do genetics on dogs and cats, so it would be really interesting to see the genetics of the color patterns in gliders.

I had read a little on leu breeding and seen that people were not really breeding leu to leu b/c they are still closely related, thats what raised my question as to the percentage of the hets.

Are most of the leu hets still close related?


**Edited to add: I just sent UC Davis an e-mail asking if they had any genetic services for gliders. I'll let y'all know what/when I find out.**


Edited by NickieDo (12/31/07 02:34 PM)

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#442639 - 12/31/07 04:46 PM Re: Genetics and coloring questions and one idea ; [Re: ]
BeckiT Offline
Glideritis Anonymous

Registered: 09/29/06
Posts: 16083
Loc: Manitowoc, WI
how closely related the leu hets are depends on if they're from a leu - het pair, a leu - non het pair, or a het - het pair and how bred out those pairs are wink
_________________________
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Glidin' High Sugar Gliders
So You Want to Own a Sugar Glider? Read and Share wink

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