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Notice too the leg colour differences between the ER chicks to the e+/e+ chicks. The following 2 pullets are both id+/- (their father id+/id+), yet for some reason the spotty mutation bleaches out id+ in ER juveniles much more than on e+/e+. Logically you would think it would be the other way around, that epidermal pigment would make the ER chicks darker. Note, this is for day-olds & juveniles. As adults the e+/e+ id+ spotties lose the willow tinge, become yellow-legged.

ER id+ chick left, e+/e+ id+ chick right:


Also the e+/e+ juvenile chicks tend to show more phaeomelanin, particularly on the breast.

The hom. spotty roo X crele hen chicks, update (@ 14 weeks, 4 days old):

e+/e+ spotty pullet:

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ER/e+ het. spotty / barred cockerel:

Close-up of neck:
(remember the base is Brown Red: orange-gold, black-striped neck hackles):


Tail:


Left view:


Back:


*Note, I've had to move pigmented feathers up to surface, otherwise he looks a typical spotty (barring hard to see, quite broad dark bars). There is hardly any gold showing, this not typical either (might come later?). For a while there I was worried I had the wrong mother, not the Crele (had her young silver duckwing pullets in the same pen, thought not laying).

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Next I'll put this cockerel back to a crele hen & see if any non-spotty or non-barred, or both spotty/barred pullets segregate (the latter would be very hard to know as spotty b+ pullets sometimes have some barred feathers). Also see if any non-spotty B/b+ cockerels segregate (shouldn't be any, all should be B/B). Plus I might put him to a e+/e+ wild-type hen, see again if any non-spotty or non-barred or both spotty/barred daughters, or any both non-spotty/non-barred sons.

Using Henk's punnett square gif generator...
* I'll use B^Sp (BSp) for spotty mutation (this not determined yet)

If the sex-linked spotty mutation is an allele of the B locus...
Het. ER/e+ B/BSp (barred/spotty cockerel) X e+/e+ wild-type hen


Offspring Phenotypes:
1/4 (25%) ER/e+ or e+/e+ B/b+ het. barred males
1/4 (25%) ER/e+ or e+/e+ B/b+ het. spotty males
1/4 (25%) ER/e+ or e+/e+ B/- barred females
1/4 (25%) ER/e+ or e+/e+ B^Sp/- spotty females

*So no b+/b+ or b+/- non-barred or non-spotty, nor any B/B^Sp barred/spotty should segregate (if spotty is an allele of the B locus).
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If the sex-linked spotty mutation is an allele of the B locus...
Het. ER/e+ B/BSp (barred/spotty cockerel) X e+/e+ B/- Crele (barred) hen


Offspring Phenotypes:
1/4 (25%) ER/e+ or e+/e+ B/B hom. barred males
1/4 (25%) ER/e+ or e+/e+ B/B^Sp het. barred/spotty males
1/4 (25%) ER/e+ or e+/e+ B/- barred females
1/4 (25%) ER/e+ or e+/e+ B^Sp/- spotty females

*So no B/b+ or B^Sp/b+ het. barred or het. spotty non-barred males, no b+/- non-barred or non-spotty & no B/B^Sp barred/spotty females (if spotty is an allele of the B locus).

just testing seeing I refuse to pay photobucket so I am using my flickr account.

this is a spotty B/b ER or E/and something from a bird from Kazjaps about 3 generations ago:

[img]https://flic.kr/p/22xNUxA[/img]

Thanks Ruff for the update.

I'll come back in a few days to update this spotty breeding thread. I have no home internet at present, need to wait until it stops raining to fix it, in the meantime I'm running out of phone data....

I don't mean to hijack your post, but if you have internet back and when you have the time, can you take a look at my birds and tell if they have the spotty gene or not? Thank you.

http://www.the-coop.org/forums/ubbthreads.php?ubb=showflat&Number=117189