7-Gen COI: 0%? Means what exactly

[Arabela]

When looking threw a horses pedigree all horses display this "7-Gen COI: ?" COI is short for? and what does the number relate too?

Thanks for the help.

[SeinaMacabre]

COI stands for Coefficient of Inbreeding.
It measures the common ancestors of dam and sire, and indicates the probability of how genetically similar they are.

[nyraeia]

If you look at my stallion [NYR] Loreno's pedigree, you will notice that he has a COI of 0.78% because his sire's great great great grandmother is also his great great grandmother. :)

[Arabela]

Ahhh thanks to you both, understand now.

[Argent]

The COI calculation Larissa uses does not measure relatedness between parents, but in general.

[SeinaMacabre]

What do you mean in general? Ancestry as I stated or?

[Argent]

A horse's COI should be 0% if the parents have no common ancestor within 7 generations because none of the genes will be alike by descent. However, the formula Larissa uses factors in any duplicated ancestors, even if they are only duplicated in one parent.

[SeinaMacabre]

Ahh alright, didnt know that C:

[April Hart]

This helped me... Thanks!