- Jan 31, 2010
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Your five ducklings all look to have fairly even global blue except for areas of no colour (white). For this to be they will have inherited extended black & heterozygous blue. They also have inherited a gene which inhibits pigmentation (but not globally eg c/c), so a white pattern gene (but not that for bibbing alone).
Your grey really cannot be the father because he doesn't have extended black or blue, nor the dominant runner (R) pigment inhibiting gene . Yes, when mated to the black duck some/all ducklings could have inherited E (depending on purity), & when mated to the blue duck some/all ducklings could have inherited E (depending on purity) & 50% Bl, but neither matings would produce patterned ducklings like you have? They look to have inherited the Runner pattern gene. The only duck in your first photo with what looks like the dominant runner pattern gene is your fawn & white duck!
From my readings, the American fawn & whites (purebreds) have homozygous blue, so, if this is the case with your duck, then this would be where the heterozygous blue in all your ducklings has come from. And the dominant runner pattern could only have come from the fawn/white duck. If any of your other ducks (or grey drake) had even a single dose of the dominant runner pattern gene then I would expect some areas/pattern of no colour (white), as in your ducklings produced (R/r+). But your fawn/white duck doesn't have extended black does she, so where did that come from, certainly not your grey drake. That has to have come from your chocolate drake!
As for the facial markings, extended black (which your ducklings all have from what I can see) would likely extend eumelanin into those areas, even in the heterozygote, so even if the base colour of your choc drake is wild-type mallard (M+) the lighter eyestripes that normally run above & below the eye are unlikely to be clearly visible in the ducklings? The runner pattern gene (from the little I have seen) does typically produce white lines extending from the neck in a direct line to the eye which is more in keeping with that genes expression & your ducklings phenotype. The pattern is irregular or haphazard in your birds possibly partly due to their heterozygous state (R/r+)?
If your ducklings were the product of your grey drake & fawn/white duck then you would likely produce something similar to pied blue-fawn mallard type birds.
My views based on my understanding of colour gene inheritance theory. Haven't mentioned sex-linked brown dilution for various reasons.
Good luck with your lovely birds
Your grey really cannot be the father because he doesn't have extended black or blue, nor the dominant runner (R) pigment inhibiting gene . Yes, when mated to the black duck some/all ducklings could have inherited E (depending on purity), & when mated to the blue duck some/all ducklings could have inherited E (depending on purity) & 50% Bl, but neither matings would produce patterned ducklings like you have? They look to have inherited the Runner pattern gene. The only duck in your first photo with what looks like the dominant runner pattern gene is your fawn & white duck!
From my readings, the American fawn & whites (purebreds) have homozygous blue, so, if this is the case with your duck, then this would be where the heterozygous blue in all your ducklings has come from. And the dominant runner pattern could only have come from the fawn/white duck. If any of your other ducks (or grey drake) had even a single dose of the dominant runner pattern gene then I would expect some areas/pattern of no colour (white), as in your ducklings produced (R/r+). But your fawn/white duck doesn't have extended black does she, so where did that come from, certainly not your grey drake. That has to have come from your chocolate drake!
As for the facial markings, extended black (which your ducklings all have from what I can see) would likely extend eumelanin into those areas, even in the heterozygote, so even if the base colour of your choc drake is wild-type mallard (M+) the lighter eyestripes that normally run above & below the eye are unlikely to be clearly visible in the ducklings? The runner pattern gene (from the little I have seen) does typically produce white lines extending from the neck in a direct line to the eye which is more in keeping with that genes expression & your ducklings phenotype. The pattern is irregular or haphazard in your birds possibly partly due to their heterozygous state (R/r+)?
If your ducklings were the product of your grey drake & fawn/white duck then you would likely produce something similar to pied blue-fawn mallard type birds.
My views based on my understanding of colour gene inheritance theory. Haven't mentioned sex-linked brown dilution for various reasons.
Good luck with your lovely birds
