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Alright, someone with more expertise please fill the rest of us in on what it is and how we should use it in our breeding programs. To the best of my knowledge (and please correct me if I am wrong) but it is basically the probability of undesireable traits showing up in puppies based on the relationships of the ancestors??? A COI of 20% (0.20) or less is supposed to be desireable?

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MRC,

You basically have it down pat. It is a mathetical equation based on relatedness that calculates the probability of harmful recessives showing up in offspring of a cross.

Research and several authors such as Willis report that as breeders we should be targeting COI of 0.20 or less.

Now, if you are figuring it out long hand ... wow ... that is a chore. I have TBS software that calculates it for me.

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Larry Atherton

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I will add that historically many of my crosses bounce right around 10-15% COI.

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Larry Atherton

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Nope, I use Wincanis Pedigree.

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what about one that is 22%

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quote:

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Originally posted by Larry Atherton
MRC,

You basically have it down pat. It is a mathetical equation based on relatedness that calculates the probability of harmful recessives showing up in offspring of a cross.

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20% is not a "hard stop"....

Again, it is like any other inbreeding or line breeding factor. If your chosen line is prone to inheritable heath issues, when you get much of 20% COI, you are more prone to see those issues with some frequency.

It truly has no real bearing on the outcome of the hound in the woods....

It is a measurement, along with the size of the feet, the ears, or the bung.....it does not affect ability and talent, but is a significant driver to traits.....

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Joe Newlin
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quote:

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Originally posted by MRC
But wouldn't this also be the probability of getting desirable traits?

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Guess you're right, I've got one with a bung as big as a grapefruit. and he want tree a lick, all he wants to do is fight.

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quote:

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Originally posted by Oak Ridge
MRC....define "traits" a little more, then I believe it would be easier to land on an answer.

If you are talking about size, color, voice, length of ear....then YES...if you are talking about tracking ability....then my belief is NO....that is linked to ability and talent...which to a great degree are not inheritable, but are linked more to the "nurture" than nature.

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quote:

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Originally posted by MRC
I should've made myself clear. Like you said, the COI should help predict the physical features (i.e. build, size, color) along with undesirable traits such as the susceptibility to physical problems (hip dysplasia, over bite, eye problems). Correct?

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