Hybrid .... Spalding

[Dany12]

We use to read that :
"when you breed on Spalding's the phenotype does not always come on every bird the same, some show it more than others. If you were to add more green they would start to all looking alike. When you breed some that does not have Spalding it will cut that in half and will look more like a Indian blue. "

Genetically how it can be explained?
The mother provides 50% of genotype of the young and the father 50%.
Why phenotype doesn't follow?
Why the phenotype .... hmm! ... Do not play the game?

 

[Duckopolis]

I think it is a random mutation in genes?

 

[AugeredIn]

Couple of reasons.
1. Some characteristics are determined by dominant, recessive and sex linked gene pairs which all express differently. So while the gene info may be there it is not expressed or only partially expressed.
2. Some characteristics are defined by multiple gene pairs and those gene pairs act as above.

 

[Rosa moschata]

F1 Spaldings should look rather similar, but offspring of Spauldings will vary due to the randomness of how much of each parent species ends up in each egg/sperm.

 

[Dany12]

So ! ... you can get ... in theory , a spalding 50% ( cross Spalding 50% X Spalding 50% ) who has the look of a indian Bleu !

 

[Rosa moschata]

Yes, but that would be at the tail of a bell curve with respect to likelihood. Think of F1 Spauldings like a deck of cards made up of half of one deck, and half of another non-matching deck. Now, when that Spaulding reproduces, it will pass on half of its cards -- but cards will be chosen at random. So the next generation will most likely get a mix of its parent's two different decks, but it is possible to get all of one deck and none of the other -- though a very very tiny chance so as to be all but impossible.

 

[connerhills]

Danny, thank you for posting my statement, I don't play games. I have found that when you get into some Spalding's at around 87% some colors will start to look more like a green and although the gene is there ( of the color you started with ) it does not show in the phenotype very well and one more cross with a full green ( 15/16 ) will take more of the color out and look more like a green. but it is still a high percentage Spalding of the color that you started the cross with. If you started with your first cross and go back to a wild pattern blue this will cut the Spalding by 50% and only a little difference show up ( like the hen from birdrain ) enough to see it is a Spalding of low percentage and again cross to a wild pattern blue will make the bird only 12% green and hard to see it in most birds. Thank you connerhills

 

[Dany12]

Yes, it was your statement.
But it is a reflection that we see several times on this forum.
I wanted to know how this is translated in genetic ... in the genome.
Is a Spalding a IB split green ? (provocative question!)

 

[AugeredIn]

.......Is a Spalding a IB split green ? (provocative question!)

No. It is a dilution of the genetic makeup.

 

[Dany12]

What can be that spalding ? .... A real jewel!
A peahen spalding high percentage ..... OK, but so blonde ( head ) !
I don't think it's a Black shoulder !

pics credit : Resolution