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Lethal Gene???

post #1 of 7
Thread Starter 

What is it?

And what type of chickens have it??

I've heard RR and NHR........

If so Who else?... delaware?

Thanks

post #2 of 7

Creeper gene, and Tufted gene are lethal. Japs, Seramas, Shepherd's Plaid, and Dutch Luttes carry Creeper, and Araucans, Americanas, and EEs carry Eartuft genes.

The Crested gene in mallards if lethal.
RRs and NHRs don't carry lethal genes. Neither do delawares.


Edited by Ducks and Banny hens - 1/9/12 at 1:29pm
post #3 of 7

Ameraucanas and EE's dont carry a lethal gene. They have muffs and beards, not ear tufts.

Mother of 5 Nigerian dwarf goats, 2 dogs, 7 chickens from Key West, 1 mottled Aracuana, a lavender Araucana, pair of lavender Ameraucanas,  4 seramas, 1 frizzled naked neck bantam, a BC Marans, a couple of olive egger's, a buff orp mix, 2 silkies, several random mixes,16 year old son, 21 year old daughter and 47 year old DH.
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Mother of 5 Nigerian dwarf goats, 2 dogs, 7 chickens from Key West, 1 mottled Aracuana, a lavender Araucana, pair of lavender Ameraucanas,  4 seramas, 1 frizzled naked neck bantam, a BC Marans, a couple of olive egger's, a buff orp mix, 2 silkies, several random mixes,16 year old son, 21 year old daughter and 47 year old DH.
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post #4 of 7

According to the post above, the creeper gene - it is a trait that can be seen in chicks with short leg genes (Seremas for example). They will die before hatching. The tuft gene is from araucana. The same idea as the creeper gene. They will die before hatching as well.

Breeding: Silkies, Barred Plymouth Rocks, Ameraucanas, Naked Necks, Buckeyes, Welsummers, Marans and Mottled Houdans. 

 

Pictures by Les Farms are not to be used without written permission from me first, and never for any commercial gain. Thank you.

 

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Breeding: Silkies, Barred Plymouth Rocks, Ameraucanas, Naked Necks, Buckeyes, Welsummers, Marans and Mottled Houdans. 

 

Pictures by Les Farms are not to be used without written permission from me first, and never for any commercial gain. Thank you.

 

Visit our COOP Page! 

 

Raising CX Free Range ~ Poultry Sexing Tips ~ Raising Chickens Naturally 

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post #5 of 7
Quote:
Originally Posted by Ducks and Banny hens 

Creeper gene, and Tufted gene are lethal. Japs, Seramas, Shepherd's Plaid, and Dutch Luttes carry Creeper, and Araucans, Americanas, and EEs carry Eartuft genes.

The Crested gene in mallards if lethal.
RRs and NHRs don't carry lethal genes. Neither do delawares.


Not according to The Chicken Health Handbook by Gail Damerow.

"Dark Cornish carry a similar short-leg gene that causes death at the time of hatch. Signs of "Cornish lethal" include short beaks and wings, and bulging eyes. New Hampshires carry a lethal that causes death in the twentieth and twenty-first day of hatch. Signs are crooked necks, short upper beaks, and shriveled leg muscles. The silver gray Dorking has a lethal that causes death in the ninth day of incubation. Embryos have short necks and beaks. A Barnvelder lethal causes "Donald Duck syndrome", in which the upper beak curls upward, the lower beak curls downward, and death occurs in the last days of incubation. Congenital tremor is a lethal gene found in a number of breeds including Ancona, Plymouth Rock, Rhode Island Red, white Leghorn, and white Wyandotte. Chicks hatch but can't control their neck muscles. When a chick tries to stand, its head falls over and the bird falls down. Unable to eat or drink, it dies soon after hatching. This is by no means a complete list of all the possible lethal genes. Among other lethals are those found in the black Minorca (short legs with extra toes), Rhode Island Red (short legs, wings, and beaks), white Leghorn (short legs and parrot-like beaks), and white Wyandotte (early embryonic death). Two common genetic factors that don't qualify as lethal genes, but that do reduce hatchability, are frizzledness and rumplessness."

Quoted straight from the book.

post #6 of 7

Sorry but I've never, ever heard of any American class breed having a common lethal gene, including New Hampshires and the related likes.

Ameraucanas and Easter Eggers don't have any lethal genes, as they have muffs and beard, not tufts.

Araucanas, Polish, Shamos, Olive Eggers, and a handful of Finn Sheep, Wensleydale Sheep, Gotland Sheep, Kinder Goats, a Yak, and various rare breed Turkeys, Ducks, and Pigs.

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Araucanas, Polish, Shamos, Olive Eggers, and a handful of Finn Sheep, Wensleydale Sheep, Gotland Sheep, Kinder Goats, a Yak, and various rare breed Turkeys, Ducks, and Pigs.

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post #7 of 7
Quote:
Originally Posted by Illia 

Sorry but I've never, ever heard of any American class breed having a common lethal gene, including New Hampshires and the related likes.

Ameraucanas and Easter Eggers don't have any lethal genes, as they have muffs and beard, not tufts.


There are a number of lethal genes that are very UNcommon or rare.  My guess is that the ones listed by Damerov for American breeds are at best UNcommon.  I'm thinking that some of her data may come from Hutt, which, while very detailed and well researched, is quite old.  If a lethal is present in a breed, but not needed for the genotype, most would breed away from it, working to eliminate it, and over time it would become less and less common.

Breeder & Exhibitor of fine silkies in recognized and project varieties.
adult and started pairs occasionally available;
   No eggs or chicks. 
Support your local poultry clubs, breed clubs, ABA & APA!

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Breeder & Exhibitor of fine silkies in recognized and project varieties.
adult and started pairs occasionally available;
   No eggs or chicks. 
Support your local poultry clubs, breed clubs, ABA & APA!

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