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Go Back   Talk Budgies Forums > Budgie Talk > Budgie Breeding > Mutations and Genetics


Mutations and Genetics Learn about budgie genetics and the wide variety of mutations.

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  #1  
Old 04-02-2017, 08:15 AM
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Default Question about yellow face mutation

Is it possible for a yellow based bird to be yellow faced? Or is that only something that is in white based birds? Also how would you even tell if a yellow based bird, was yellow faced?


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  #2  
Old 04-02-2017, 12:41 PM
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I'd suggest reviewing the information regarding various mutations in these links:

Budgie Mutation And Color Guide - Cute Little Birdies Aviary

Mutation Short-cut Lists


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Old 04-02-2017, 12:57 PM
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The gene for yellow face can be inherited by green series (yellow based) budgies. Due to the visual characteristics of a green series budgie, the easiest way to tell if one is potentially carrying/masking yellow face, would be through breeding with a normal blue series budgie.
The green series budgie would have to be split for blue in order for them to have blue series chicks. By looking at the chicks, then you would have the answers.
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  #4  
Old 04-02-2017, 08:21 PM
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Okay thank you. I was actually looking through the mutation guide and thats what peaked my question because all the budgies shown under the yellow face section were blue.
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Old 04-02-2017, 08:36 PM
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It is thought that all the yellow face varieties are mutations of the blue gene. In reality it has only been proven in yf1, I think, but is likely to be the same in yf2 and gf.

This means that just like a green bird can't also be blue, but can be split for blue, a green bird can't also be yf but can be split for yf. It also means a green bird can't be split for both blue and yf, it can only be split for one or the other.

Someone with good breeding records and experience could prove this one way or the other, but i haven't seen anyone do that yet. All I have seen is discussions by breeders who have bred many and their results fit with the above theory.
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Old 04-03-2017, 02:46 AM
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Quote:
Originally Posted by tonic View Post
This means that just like a green bird can't also be blue, but can be split for blue, a green bird can't also be yf but can be split for yf. It also means a green bird can't be split for both blue and yf, it can only be split for one or the other.
Can a bird be split to yf? I thought it was a dominant/visual trait?
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Old 04-03-2017, 08:12 PM
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If yf is a mutation (allele) of the blue gene then it is recessive to green but dominant to blue. So green can be split for yf, but blue can't.
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Old 05-03-2017, 01:16 AM
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Grn can carry Yf but not split for it
Blu can carry YF but not split for it
Green can be split for blue
Works the same as violet(no splits)...it is a wash..if you see it you have it.If not you dont.( except YF1 in Double factor)
So you can have a green bird that carry's YF and split for blue but because its grn the YF dosnt show
Yf is not recessive to green ..its there but hidden
So breeding a green to a Yf bl you could get green chick that are split blue and YF carriers with type 1 2 or golden in single or double factor.
Hope this helps
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Old 05-03-2017, 09:21 PM
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Quote:
Originally Posted by Tango55 View Post
Grn can carry Yf but not split for it
Blu can carry YF but not split for it
Green can be split for blue
Works the same as violet(no splits)...it is a wash..if you see it you have it.If not you dont.( except YF1 in Double factor)
So you can have a green bird that carry's YF and split for blue but because its grn the YF dosnt show
Yf is not recessive to green ..its there but hidden
So breeding a green to a Yf bl you could get green chick that are split blue and YF carriers with type 1 2 or golden in single or double factor.
Hope this helps
It has been proven by breeding that yf1 is an allele of green, just like blue. So a green can only be split for it, if it is present, not mask it. YF2 and GF appear to behave in the same manner, without the official proof yet available, however, I do know long time breeders that have breeding records to confirm it.

If you breed a green/yf1 to a blue you can only ever get greens and yf1, never greens, yf1 and blues. As I mentioned, I know breeders whose expereince indicates the same is true for the other two yf varieties. It would be great to be able to set out on a breeding program to prove or disprove this!

The difference to violet is that violet is a separate gene, not an allele of green. If yf2 or gf prove to be separate genes then it would work in the same way as violet. It seems logical to me that a gene that has already mutated to effect the way yellow is expressed (green-blue-yf1) may produce a similar effect (yf2-gf) via a different mutation. It seems less likely that an unrelated gene may mutate to create the same effect. But, of course it may have happened that way.
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Old 05-06-2017, 12:08 PM
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If YF is an over lay a bird can not be SPLIT for it...IT is a visual.If it carries YF you cant see it because it has a yellow head.

""If you breed a green/yf1 to a blue you can only ever get greens and yf1, never greens, yf1 and blues."" Where did I say that..Look above.I said split for blues not get blues.

So breeding a green to a Yf bl you could get green chick that are split blue and YF carriers with type 1 2 or golden in single or double factor.

I dont want to argue but I have been breeding show class for 25 yrs.I have aprox 175 budgies of many mutations...dilutes,greywings clearybodies,rainbows,crested and frill backs.I have been asked to judge shows so I do have some experience.Look at some of the articles that the champion breeders have written all across England.
To bad you wernt close we could sit and talk genetics over a beer.
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