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#37126 - 10/08/08 12:45 AM Re: What's the genotype of these marans?
Hen-Gen Online   content
Ruler of the Roost

Registered: 10/01/05
Posts: 1135
Loc: Island of Fetlar, Shetland
Well, Sandy, not only male offspring but 66% male to 33% female. Its called the ladykiller gene (lk) and is carried as a recessive by the male and is sex linked. So the half of his potential daughters who inherit it fail to develop in the egg.
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#37127 - 10/08/08 06:16 AM Re: What's the genotype of these marans?
Hen-Gen Online   content
Ruler of the Roost

Registered: 10/01/05
Posts: 1135
Loc: Island of Fetlar, Shetland
Re-read that and realised that its not very clear. Its a recessive, sex linked gene. So one copy can be carried by a cockerel with no detrimental effects to him. However when bred from to any hen then half of his potential daughters die at about the third day of incubation. So,on average, out of twelve fertile eggs you get six cockerels, three pullets and three that die.
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#37128 - 10/09/08 04:54 AM Re: What's the genotype of these marans?
Sandy V. Offline
Chicken

Registered: 06/05/08
Posts: 147
Loc: England
Ah that's it Lady Killer! Thanks.

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