5th toe genetics,need some help from the genetics experts.

[Georgia Boy 1970]

I will start here.I have rooster that is a pure polish.He is a tolblunt/golden laced split.I bred him over several easter egger hens.The pullets and roosters along with the sire/daddy rooster was on the yard,just them.When the pullets started laying,I decided to hatch some of their eggs.And to my surprise several of the chicks were born with the 5th toe on one foot and not the other,and some both feet had the 5th toe.None of the parents have the 5th toe.So I was puzzled,just came to the conclusion that brother/sister mating brought it out or that since some in the U.S. have used mottled houdans in their tolblunt polish projects,thought this might be it.What is going on?

 

[tadkerson]

I will start here.I have rooster that is a pure polish.He is a tolblunt/golden laced split.I bred him over several easter egger hens.The pullets and roosters along with the sire/daddy rooster was on the yard,just them.When the pullets started laying,I decided to hatch some of their eggs.And to my surprise several of the chicks were born with the 5th toe on one foot and not the other,and some both feet had the 5th toe.None of the parents have the 5th toe.So I was puzzled,just came to the conclusion that brother/sister mating brought it out or that since some in the U.S. have used mottled houdans in their tolblunt polish projects,thought this might be it.What is going on?

Polydactyly ( extra toes) is caused by an incompletely dominant autosomal gene.There are also genes that can modify the expression of polydactyly and also a gene that can inhibit the expression.

At least one of the parents is carrying the gene for polydactyly which was passed on to the offspring; the parent also carries a gene that inhibits the expression. The offspring did not inherit the gene that inhibits the expression; therefore they have 5 toes.

There is also a recessive gene that can cause polydactyly but it is expressed in a different manner; I do not believe it is this type of polydactyly.

Tim

 

[Georgia Boy 1970]

Polydactyly ( extra toes) is caused by an incompletely dominant autosomal gene.There are also genes that can modify the expression of polydactyly and also a gene that can inhibit the expression.

At least one of the parents is carrying the gene for polydactyly which was passed on to the offspring; the parent also carries a gene that inhibits the expression. The offspring did not inherit the gene that inhibits the expression; therefore they have 5 toes.

There is also a recessive gene that can cause polydactyly but it is expressed in a different manner; I do not believe it is this type of polydactyly.

Tim

Thanks Tim

 

[Sonoran Silkies]

Which gene supresses polydactyly? I know that low temperatures during the first few days can, but I didn't realize there was an inhibitor gene. On one of the silkie threads, someone just asked if high temperatures can cause extra toes to express.

I came across a couple of interesting articles on webbed feet earlier today. http://www.nytimes.com/1996/05/21/s...biochemical-signal.html?pagewanted=all&src=pm and http://books.google.com/books?id=Vt...BMA4#v=onepage&q=duckfoot in chickens&f=false

 

[tadkerson]

Syndactyly can also be found in chickens. No specific gene mentioned in the research

Tim