@Kev, at your leisure, can you take a look at these posts over on the Cream Legbar thread, with regard to genetics of Eumelanin? My rooster is from ChicKat and is son of Robin, and may carry this (odds are good looking at the chicks I've hatched so far - one pullet has already been named "Joan Jett"), and at least one of the mother hens (Paula, of blessed memory) was clearly melanized.
Skimmed from those posts onwards.. very active thread!
To be brutally honest.. that black chick is result of either misidentification of some sort.. or it is isbar-legbar cross (if I skimmed correctly, the person has both breeds right?).
All the back and fro about that chick is denial/based on wrong assumptions, sorry to say.. seems rude to say this but ahem..
Legbar crossed with isbar will produce a black chick.
A duckwing pairing of any sort will not produce any black downed chicks like that. Period. There are genes that can make a duckwing grow up very dark or even black/almost black all over but these never hatch out black, always striped pattern of some sort with the feathers coming in dark.
If the person has isbars.. this is the far simpler and far more likely part of the answer, in whatever way(is isbar or isbar cross etc).
I'm interested in your input, in general (about our theories), as well as potential for crossing into other colors. Would Lavender also dilute this gene (does it dilute all blacks or only some forms of black)? Seems off topic, couldn't figure out where else to post, but just trying to understand color more, as it relates to Aloha and other birds. Especially as if I try for green egg laying aloha NNs, it could be via the CLs, but if my birds all carry these darkening genes, that may not be a good idea after all and could end up a disaster...
(I really am starting to become enamored of the idea of adding lavender to the Aloha NNs... And I could use lavendar ameraucanas... Why do I have this lavender obsession?! )
- Ant Farm
Lavender dilutes ALL pigments to a soft pastel color. Red, gold, buff, brown, black, etc. Porcelains are a great example of this, the only difference between porcelain and mille fleur is the porcelains have lavender.
Over Aloha pattern, the gold base would be diluted to a straw color- same as on porcelains, and any black would be diluted to lavender. Basically they would be a softer toned/pastel version. Either lavender tailed straw mottled or a high mottle porcelain(when the black barring is present- these would be diluted to lavender) I think they would be very beautiful!
It is a good question regaring lav amers. A solid lavender is a solid black chicken with lavender 'added'. Lavender is recessive, so a cross of lav with legbar would produce black or black with white head spot(this would be indication of barring) chicks.
All of those would be lavender carriers so you could get away by breeding them with Alohas, which would produce half black chicks and half cream/partridge/maybe a few chipmunk stripe downed chicks. If you don't want blacks, all of the black downed chicks would be immediate culls.
What to do with this second generation.. it would be best to keep as many chicks as you can for breeding because the chances are 50% for each bird to carry lavender and there is no way to tell which is which and you want to keep as many pullets as possible to POL to select for egg color. Then either breed a cockerel(s) with those pullets to hit on chicks showing lavender.. lavender mottleds is possible from this but numbers are pretty low. Or take your chances with keeping a fair number of pullets to POL and breed them to an Aloha to get half Alohas.. and a random number of them will be carrying lavender.
I would advise doing both- second generation cockerel with pullets, and pullets with Aloha roo.. I say pullets because it is 'easier' to keep extra pullets and you want to carry on the blue egg gene.. which is not so easily test-able in the cockerels.
Hmm, getting a bit long so I will stop now and see how this goes so far?
Edited by Kev - 4/18/16 at 5:13pm