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Breeding siblings ?


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It never done me no harm

If dominant is D and recessive is R there is 3 ways they can divide and come together DD DR RR. Good traits are usually dominant. You cant add by inbreeding you can only take away, so you take away th

ive done half brother and sister mating,and son over his mother all pups were fine and good examples of there breed then i out crossed

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  On 29/08/2024 at 18:14, gnipper said:

It's line breeding if it works and inbreeding if it don't. 

 Some very good livestock of all species has been produced from line breeding

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Agree with that first sentence. 

Why would anyone breed two siblings from the same litter? Genuine question.

I wouldn't take a free pup from a brother sister mating, no benefits at all. Same exact genetics, no improvement to be gained. 

 

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  On 29/08/2024 at 21:37, Backandbeyond said:

Agree with that first sentence. 

Why would anyone breed two siblings from the same litter? Genuine question.

I wouldn't take a free pup from a brother sister mating, no benefits at all. Same exact genetics, no improvement to be gained. 

 

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They do it to see what underlying genetic problems exist in their dogs and to cement a line. I wouldn't do it on purpose but I've only bred the odd litter for myself and rather use dogs that were good workers even if they are totally unrelated. Not worth the chance of having underlying problems come out later on. They have a strain of lab mice they only breed brother to sister and are never sick but it's probably hundreds of generations and culling to get to that stage.

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  On 30/08/2024 at 07:21, jeemes said:

Why did you outcross ?

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The whole point of inbreeding is to lock in traits, and the only point in outcrossing is to add in traits that you desire. It would make no sense inbreeding and then immediately outcrossing, if that's needed then you shouldn't have been doing the inbreeding to start with. What is key is to cull hard when inbreeding, if done properly then you should be ok.

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  On 30/08/2024 at 07:27, Krishna said:

The whole point of inbreeding is to lock in traits, and the only point in outcrossing is to add in traits that you desire. It would make no sense inbreeding and then immediately outcrossing, if that's needed then you shouldn't have been doing the inbreeding to start with. What is key is to cull hard when inbreeding, if done properly then you should be ok.

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I mean why didnt you go in more? How can we be sure that the good traits we are wanting to fix are fixed so quickly?  Can you rid the strain of all recessives in just 2 matings?  When you outcross you are introducing thousands of new genes and the the risk of undoing the good work you have done. The idea is to purify/fix as you say, its a fascinating thing but it takes time in dogs that are bred for work traits, but you have to have an eye on the physical aswell. 

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