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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 05-15-2014, 12:44 PM
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FlockLeader (Greg)
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Default yellowface greys rare?

So the other day, my friend asked me if there could be a grey budgie with a yellowface...
I looked on CuteLittleBirdies website, and saw that indeed there is such a thing...

I then tried to use the Genetic Calculator to see if this combo is something I would be able to produce(if I felt so inclined), and it seems that there is very low probability in getting a grey yellowfaced budgie....

After thinking about it for a while, I don't believe I have actually seen a YF Grey budgie in person, ever...

Is it THAT rare to have one??

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  #2  
Old 05-15-2014, 01:12 PM
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Actually, the odds get even lower, because the 1st generation will be only SPLIT for yellowface....

1st generation result of grey mated to yellowface:
Genetic Calculator 1.3
Species: Budgerigars Melopsittacus undulatus - result
1.0 grey(sf) green
x 0.1 bl.yellowface
% from all 1.0
50.0% 1.0 grey(sf) green /bl.yellowface
50.0% 1.0 green /bl.yellowface
% from all 0.1
50.0% 0.1 grey(sf) green /bl.yellowface
50.0% 0.1 green /bl.yellowface
Calculated on 15 May 2014 19:03:15 , Prague
© 2002 - 2014 Martin Rašek

Then, Id need 2 of those birds to HOPEFULLY get to a yellowface grey on 2nd generation:
Genetic Calculator 1.3
Species: Budgerigars Melopsittacus undulatus - result
1.0 grey(sf) green /bl.yellowface
x 0.1 grey(sf) green /bl.yellowface
% from all 1.0
12.5% 1.0 grey(df) green /bl.yellowface
25.0% 1.0 grey(sf) green /bl.yellowface
12.5% 1.0 green /bl.yellowface
6.25% 1.0 grey(df) green
12.5% 1.0 grey(sf) green
6.25% 1.0 green
6.25% 1.0 grey(df) bl.yellowface <---
12.5% 1.0 grey(sf) bl.yellowface <---
6.25% 1.0 bl.yellowface
% from all 0.1
12.5% 0.1 grey(df) green /bl.yellowface
25.0% 0.1 grey(sf) green /bl.yellowface
12.5% 0.1 green /bl.yellowface
6.25% 0.1 grey(df) green
12.5% 0.1 grey(sf) green
6.25% 0.1 green
6.25% 0.1 grey(df) bl.yellowface <---
12.5% 0.1 grey(sf) bl.yellowface <---
6.25% 0.1 bl.yellowface
Calculated on 15 May 2014 19:06:04 , Prague


Im guessing that with the birds I currently have, I would be forced to do some line-breeding to get the results i would want.

This doesnt seem like a very good idea... inbreeding for only an 18% chance from 2nd generation...

Last edited by FlockLeader; 05-15-2014 at 01:20 PM.
  #3  
Old 05-15-2014, 04:46 PM
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Grey is dominant. Yellowface is dominant. Nope not rare I have 2 in my flock and a goldenface grey too.

I'm not sure what you did with the gen calc but a yf II blue paired with a sf grey would give 50% yf greys
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  #4  
Old 05-15-2014, 04:49 PM
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Sorry 50% yf but 25% yf grey. My bad. Still good odds
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Old 05-15-2014, 08:00 PM
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Quote:
Originally Posted by Aisliyna View Post
Sorry 50% yf but 25% yf grey. My bad. Still good odds
Your greys are so beautiful, I'm so in love
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Old 05-15-2014, 08:24 PM
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I have a YF grey male. He is an english budgie and very handsome.




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Old 05-15-2014, 09:14 PM
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He is very handsome
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Old 05-16-2014, 02:49 AM
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Hey i use that calculator too.

Please consider the following:
First of all you need to know the type of Yellowface (type 1,type 2, or Goldenface). Secondly you need to know if it is Single factor or Double factor Yellowface which the calculator DOES NOT have and i ended up with babies without Yellowface from two YF parents. So you need to put the one dot to Yellowface and the other to SPLIT BLUE

Also the Calculator gives a mistake. When you select one budgie as Dominant Grey (also select the BLUE) and then select the other something else, and then select the option "Visual Only (no Splits)" it will show you the Dom. Grey(df) , where it should have shown Dom. Grey(sf)

in general when you put a non-YF with any YF(sf) to breed you have 25% chanses of getting a YF(sf).
if you breed a non-YF with any YF(df) you will get 50% oof babies YF(sf).
Note that YF are only considered budgies of the Blue series.

Hope this helped.
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Old 05-16-2014, 02:58 AM
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Forgot to mention that Grey-Green is hard to recognise in greens. Note that the Grey you are mentioning is from the Blue series (you didn't add that on the calculator for both budgies), and adding YF which only exists in the Blue series is not so rare. Also note that Mauves look a lot like Greys. Like the attached photos (a juvenile YF Mauve Dilute Opaline)
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yellowface greys rare?-b1-b2-mar.14-baby-5-5-b-.jpg   yellowface greys rare?-b1-b2-mar.14-baby-5-5-.jpg  
  #10  
Old 05-16-2014, 07:32 AM
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Quote:
Originally Posted by kwatson View Post
Your greys are so beautiful, I'm so in love
Thank you
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