Breeding black to white?

[Rare Feathers Farm]

I would think both of these are dominant...

Example:

white faced black spanish and white leghorn bred together??

 

[briarpatchfarms]

should result in black but doing this ups the risk of getting the silver gene added into you flock might not show up in the first few generations but it could evenually and its the hardest thing to breed out!

 

[Krys109uk]

White leghorns are dominant white.

A first cross between a white faced black spanish & a white leghorn will result in offspring that are all white but most often with black flecks.

Some white leghorns carry barring & silver. Depending upon what result is desired the silver ought not to be diffcult to breed out if not wanted.

 

[NellaBean]

I recently bred my Black Jersey Giant Rooster to my White Leghorn girls..........all chicks hatched out white with black spots. They are only about 3 weeks old and are feathering in with white with some black specks and even black patches (usually on shoulders).

I don't know how they work as far as dominant or recessive....I think krys explained it in another post of mine, but its been a while.

 

[Krys109uk]

equibling wrote: I would think both of these are dominant...Example:
white faced black spanish and white leghorn bred together??

It does not work like that. I'm pretty hopeless at explaining in any understandable manner but I'll try.
A gene can only be dominant, (recessive, incompletely dominant or co-dominant) to genes which are alleles. Alleles are alternative genes which could be in the gene pair. Sometimes there are only two alleles, sometimes there are quite a few. "Black" is the effect of various genes & is not an allele of dominant white. I think the known alleles of dominant white are: i+ (not dominant white), I^D (dun), I^S (smokey). i+, the wild type "not dominant white" gene, allows black but it is not, itself, black.​

 

[Sonoran Silkies]

Quote:
It does not work like that. I'm pretty hopeless at explaining in any understandable manner but I'll try.
A gene can only be dominant, (recessive, incompletely dominant or co-dominant) to genes which are alleles. Alleles are alternative genes which could be in the gene pair. Sometimes there are only two alleles, sometimes there are quite a few. "Black" is the effect of various genes & is not an allele of dominant white. I think the known alleles of dominant white are: i+ (not dominant white), I^D (dun), I^S (smokey). i+, the wild type "not dominant white" gene, allows black but it is not, itself, black.

You forgot I (dominant white) itself

Unrelated genes are neither dominant nor recessive towards each other, only towards other variations of the gene at their specific loci.

Think of a gene as having a particularly shaped hole in a child's shape sorter. Only blocks that are shaped to fit the hole can fill that spot, although they could be red/blue/pink/green/purple polka-dotted. These blocks are the alleles for that gene.

In most cases there are two identically shaped holes, and each will hold one block of the correct shape. Dominance refers to the way these two identically shaped blocks, which may or may not have different colours/patterns translates into the appearance (phenotype).

If one of the blocks is dominant to the other, it will override the more recessive block. If incompletely dominant, the appearance will fall in between the dominant and recessive blocks, and if recessive, it may show in down or first feathering, but will not show in normal adult plumage (when a more dominant allele is present). There is also a variation called co-dominance, wherein both blocks are fully expressed, but I am not aware of any genes relating to chickens that have co-dominant alleles.

 

[patandchickens]

Quote:
If it helps any, I think what equibling is asking is whether there is one color that is *epistatic* to all other colors. For instance as grey is in horses; if a horse has one dominant gray allele, it doesnt matter what other color genotype it has, it's going to end up a gray once it's mature.

(I do not know enough chicken genetics to know the answer to the question, but if I put it in proper genetics terminology presumably others of y'all *can* answer it <g>)

Pat

 

[Krys109uk]

I think what equibling is asking is whether there is one color that is *epistatic* to all other colors.

That would be homozygous recessive white.​

 

[Jamsoundsgood]

I came on here because I thought it looked interesting, and now my brain hurts.

 

[Cuban Longtails]

Krys109uk, or anyone who might know...

I have a white oriental gamefowl hen who has an occasional black feather here and there. So she would have one copy of dominate white, yes?

This year she was mated with a stag that showed the black breasted red pattern.

One of the resulting offspring appeared to be solid white, unfortunately he died young after getting his immature feathers so I do not know how his adult plumage would have looked like.

Would that mean the BBR stag could potentially carry a recessive white gene?