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Why some (Asiatic) partridge hens have NO wingtriangle ?


Why other (Asiatic) partridge hens DO have wingtriangle ?

brown/partridge and duckwing hens do not have the wing triangle. Columbian like restrictors can produce a wing triangle on them though.

and the pattern-gene have nothing todo with it ?

2 young cockerels both from eb/eb parents with het. Co, Ml and Pg.

Are the phenotypes different because of 1 and 2 doses of Ml ?

This one was born with a Columbian chick pattern

and turn out as a "Silver Quail" with Co/!, Ml/! (wingtriangle) and most possible no Pg.

This one was born with as a complete black chick !!

and turn out to be a "Black Partridge" with Co/!, Ml/Ml (wingtriangle) and most possible no Pg.

Your last pic seems to confirm my theory that one dose of Co is hypostatic to homozygous melanizers cha/cha and maybe Ml too.

Looks to be that the expression of one dose of Co is "partially" masked by the double doses of melanizers but Co still comes to the surface in moments during the growing process !
But you seem to confirm that black heads are caused by "cha/cha", yes ?

An other remarkable thing is that the Columbia restriction not seem to work all the time (both have a transversale dark line on the wing). I saw photos in Sigrids book on which where to see several transversale lines so the Silkie look as a zebra !

I am not completely sure yet about the sexe but this chick (+- 2 months) should be a female (she have a vault) but she have a similar phenotype as the young cockerel above (+- 3 months) and so the same genotype (eb/eb S/- Co/co+! Ml/Ml? pg+/pg+) .


-Or she have an exceptional pattern for a female !?
-Or he have an exceptional vaulted skull for a male !?

An other strange thing is this chick

She is a "Blue Silver Partridge", every black is diluted except the crest-feathers !

Why the single dose Bl/bl+ have no effect on the (cha/cha) black crest ?

PS she have also the Co restrictor because she have a wingtriangle !

The "moorkop" (moorhead) actually is a blue patterned chicken with the blue fading away towards the tail.

I not understand "moorkop" are blue patterned ??

This one have nothing blue but have a "moorhead" !