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 Post subject: Dominant White
PostPosted: Mon May 15, 2017 8:29 am 
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Old Mother Goose
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[quote="andrewschooks"]I have no idea what other colour genes a white Polish may have! However the lovely white bird in the pic is clearly very white and without specks of colour. That indicates that it probably is homozygous for dominant white and likely to possess a bunch of other 'whiteners'. Possibly homozygous blue (Splash), possibly barring too. [/]
viewtopic.php?f=10&p=716468#p716468

Please explain - How does splash work as a whitener for dominant white?


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 Post subject: Re: Dominant White
PostPosted: Mon May 15, 2017 1:05 pm 
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Wise Wyandotte
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The practical outcome when you have barring and splash 'under' dominant white is that colour is further disrupted and a whiter bird with fewer specs result.

Probably the same thing happens with recessive white too. Sometimes recessive white birds can actually be whiter too. There's no clear way to tell other than test mating.


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 Post subject: Re: Dominant White
PostPosted: Mon May 15, 2017 4:48 pm 
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Old Mother Goose
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Thanks. Does this always happen? Is recessive white dominant over blue. I'm trying to turn the one reasonable white into more whites (this might decide the future of the splash cockerel) without trying pot luck in a mixed pen.


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 Post subject: Re: Dominant White
PostPosted: Mon May 15, 2017 10:08 pm 
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Wise Wyandotte
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Homozygous recessive white will be pretty much white no matter what other genes are present. That means blue too!


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 Post subject: Re: Dominant White
PostPosted: Tue May 23, 2017 12:28 am 
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Old Mother Goose
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To determine if I have dominant or recessive white (1 only hen) can I use a blue male for test mating?
The other options are black or lav. or maybe a blue/red.
Trying to avoid an out cross if possible

Or is it a lot more complicated than that?


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 Post subject: Re: Dominant White
PostPosted: Tue May 23, 2017 9:27 pm 
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Wise Wyandotte
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I'd use a black.

If you were to use blue & the white was hiding splash ... it might confuse determination of dominant white vrs recessive because some progeny would be splash and look white.

Of course if the male was carrying recessive white, that would be a problem too. Are you confident about any of the males?


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 Post subject: Re: Dominant White
PostPosted: Tue May 23, 2017 9:43 pm 
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Old Mother Goose
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Not entirely although I think the black could only be carrying lav. I have a problem with pink legs but only in the whites - Araucanas in case you hadn't guessed.


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 Post subject: Re: Dominant White
PostPosted: Tue May 23, 2017 9:58 pm 
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Fiesty Fowl
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Sue, jose has white aras and if lucky might have a spare roo or cockerel .


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 Post subject: Re: Dominant White
PostPosted: Tue May 23, 2017 10:12 pm 
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Old Mother Goose
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Thanks mycoola, I'm really trying to use this girl to do some 'on the ground' genetics learning before I proceed with whites. Like my silkies the Araucanas are licorice all sorts atm. Trying to sort out just what colours I have.
I thought that Jose was moving his Aras on.


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 Post subject: Re: Dominant White
PostPosted: Wed May 24, 2017 10:49 am 
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Wise Wyandotte
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Ah! Araucanas are a mixed up breed colour wise.

Perhaps use the best rooster for type and report back what the chicks look like, then change rooster if that doesn't give an answer?


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 Post subject: Re: Dominant White
PostPosted: Wed May 24, 2017 12:25 pm 
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Old Mother Goose
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Thanks - The black male is pretty good so will use him. So is the white pullet.(and she has good leg colour)

If I also use him in the blue(?) pen that should help to clarify things.
Will also put the blue male over a couple of black pullets.
Fox got all my hens last year. Luckily not the young ones and I have culled hard. At least I have some idea of the parental phenotypes. Hopefully in a couple of seasons I will have a better idea of their basic genotypes.


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