Ok Piccolamiss, si può spiegare la causa del problema in inglese? Perché non posso farlo in Italiano corretto!

Here it comes in English :

The Sebright single laced must be on the ground-color of "Betulla", this for the correct lacing of the tail (otherwise the tail would be black as in the Wyandotte single laced).

When the legs are green this means only dermal black-pigment is present and there is no epidermal black-pigment present in the yellow skin.

*This dermal pigment is sex-linked and recessive, this means males need 2 doses (recessive genes only become visible when in double doses, is called "homozygous"), females can have only 1 doses (because this gene is positioned on the sex-chromosome of which hens have only 1 allel, is called "hemizygous"). so females need only 1 doses to be pure for this property.

*The epidermal pigment is autosomal (2 alleles for males and females) and it is Dominant, this means with only 1 doses you have already the black-pigment effect but not as intense as with a double doses.


The parents of your 5 Sebright must have been heterozygous (both having only a single doses) for the gene of the epidermal black-pigment.
-So both being heterozygous for the epidermal black-pigment gene they give only in 25% of their progeny a double doses of epidermal black-pigment, 50% a single doses and 25% no doses, these last having green shanks.
-When only one of them was heterozygous for the epidermal pigment gene they give 50% of their progeny a double doses of epidermal black-pigment and 50% a single doses, all having dark shanks.


As you can see not a single accabadabra formule, but in this way it takes many words to explain what was the problem !!

How to solve your problem of green shanks !?

Let us assume the worst scenario, your both hens have the epidermal black-pigment in only 1 doses, your "Johnny" have 0 doses.
When you breed them together, 50% of the males (as also the females) will have dark shanks but only in single doses, the others all will have green shanks.
When now you cross one of these young roosters with a hen (mother or daughter) with dark shanks (all having only 1 doses of epidermal black-pigment) you will become
-25% progeny in both sexes with 0 doses of epidermal black-pigment (green shanks)
-50% progeny in both sexes with 1 doses of epidermal black-pigment (dark shanks)
-25% progeny in both sexes with 2 doses of epidermal black-pigment (very dark shanks)

In 2 generations your problem is solved and you can stay enjoying your "Johnny" and his progeny

PS not excist a gene for green shanks, it is caused by the absence of epidermal black-pigment on yellow skins with dermal black-pigment.

Danny ho letto le tue risposte, grazie per il momento. Ora devo capire le basi della genetica altrimenti non posso comprendere il significato del tuo messaggio. Abbi pazienza, tra un po' mi rifaccio viva, intanto spero che ci sia anche qualche altra persona a partecipare al topic.

silversilkie....mi sa che se continui a scrivere in inglese ,fra un po ti scambiano per uno spammer

vabbe deve aggiungere la vendita di un paio di orologi no?

ok, allora forse e 'meglio smettere di scrivere !!

io stavo scherzando
magari scrivi anke qualke frase in italiano

Danny per piacere mi dici cosa vuol dire single laced?

cedo che significhi orlo singolo