| Author |
Topic : Impact of Wright Coefficient on Inbred Kennels |
GoGetEm
Basic User
Posts : 156
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I have seen a lot of posts suggesting that currently inbred dogs/kennels will become "worthless" under the new rules. This is not true.
Breeding two dogs, each of whom has a high Coefficient of Inbreeding (COI) can result in a high COI in the offspring (if the two dogs are closely related), or a low COI (if the two dogs are not closely related). If everything in your kennel is a virtual clone, then, yes, you will have to find something else to breed to.
And it works both ways. Other kennels in your breed may suddenly want to breed to your dogs, because they are an outcross.
This is not the end of the world as we know it!
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B Collies Rock
Premium Member
Posts : 1,000+
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I think that this will be great for the SD economy and people will start making more money from stud fees. Also the more everybody spends, the more the salary. I know that I have just recently started using other people's stud more often and their lines seem to be benifiting mine. |
kmr kennels
Basic User
Posts : 1,000+
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i just wonder how many people will suddenly mass breed within their kennels, to get as many dogs as possible before the changes take place, to then be able to have many of their inbred dogs to outcross to unrelated kennels, and create their new breeding program? 
In RL i breed cockatiels for show, and taking the COI into consideration is nothing new. There are many awesome top aviaries due to selective linebreeding to a certain percentage, then outcrossing to another linebred line, to drop the COI but keep consistancy, and merge the locked traits from both lines into new lines. I do love playing with genetics. I welcome the change. |
Veld
Basic User
Posts : 495
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this post has been edited 3 time(s)
Here's some help for those that are math challenged ...
Coefficient of Inbreeding (COI) is expressed as a percentage. To give some idea of the signficance of the numbers:
father/daughter, mother/son, or brother/sister breeding = 25% COI or .25 WIC
uncle/niece, aunt/nephew, or half-sibling breeding = 12.5% COI or .125 WIC
first cousins breeding = 6.25% COI or .0625 WIC
The above percentages assume there are no other relationships between the two parents. If there are common ancestors farther back in the pedigree, the COI is higher.
So, it looks we will still be able to breed cousins, uncle/niece, aunt/nephew, and half-siblings but not father/daughter, mother/son, or brother/sister.
Edited to add the WIC (Wright's Inbreeding Coefficient) equivalent. |
Von Wheelerhaus
Basic User
Posts : 165
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quote
posted by Veld
Here's some help for those that are math challenged ...
Coefficient of Inbreeding (COI) is expressed as a percentage. To give some idea of the signficance of the numbers:
father/daughter, mother/son, or brother/sister breeding = 25% COI
uncle/niece, aunt/nephew, or half-sibling breeding = 12.5% COI
first cousins breeding = 6.25% COI
The above percentages assume there are no other relationships between the two parents. If there are common ancestors farther back in the pedigree, the COI is higher.
So, it looks we will still be able to breed cousins, uncle/niece, aunt/nephew, and half-siblings but not father/daughter, mother/son, or brother/sister.
OMG that helps HUGELY! I just couldn't wrap my mind around all the mathematical stuff, and I'm not even mathematically challenged! lol
Thank you! *beams*
~Kaci~ |
Liberty Hills
Basic User
Posts : 3,000+
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This deserves a bump. |
Oakleaf Kennels
Basic User
Posts : 16
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I am completely math challenged and just hope I will still be able to understand and play the game... May need a good mentor |
Emerald Meadows
Basic User
Posts : 200
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this post has been edited 1 time(s)
Thank you for spelling that out for us nice and simple Veld.
I think some are WAY over reacting. It doesn't require a lot of math just some common sense. We can already see our own dogs pedigree as well as anyone elses up to three generations back - that means we know four generations. All it takes is some observation:
Do you see the dog you want to breed with in your own dogs pedigree? if yes then you have inbreeding and a COI factor. Yes figuring out what that factor is may take some skill, but I don't believe it to be necessary to succeed in this game.
I have done very little in breeding in any of my kennels as it just didn't feel right in a game designed to simulate RL. All my kennels make money and are rated in their respective breeds. |
B Collies Rock
Premium Member
Posts : 1,000+
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In simple terms, Jeff said that there will be a percentage on each page and stud page. So basically if the number on the page is more than 12 or 14 or whatever Jeff said, your dog will probably not be very good. |
Wicked Mountains
Basic User
Posts : 500+
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quote
posted by Emerald Meadows
Do you see the dog you want to breed with in your own dogs pedigree?
I think that some people are forgetting that it's really only as simple as that. They're focusing so much on percentages and genetic mathematics, they forget how simple it really is to tell if a dog is inbred, and how much. Jen |
Wildwater
Basic User
Posts : 500+
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It will make fixing a gene for a new trait (within a breed) very difficult though, wont it -being penalised for breeding close, ie mother to son etc?
I have started new 10 traits for a few breeds now and it has been great fun and something of a challenge to get these new tens. But when a new ten pops up and your dog is the only one in the breed that has it - you have to breed back to it or lose the 10 trait. Twill take away a lot of pleasure of the game for me.
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Shadowstar Kennels
Basic User
Posts : 500+
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quote
posted by Wicked Mountains
They're focusing so much on percentages and genetic mathematics, they forget how simple it really is to tell if a dog is inbred, and how much. Jen
Thanks for that. You've just made me realise I dont need to worry so much about it. I still will though. Sigh.
Sarah |
8/31/2007 9:23:48 AM
