The pedigree analysis is based on the information in the database and is only accurate to that extent.
Incomplete generations (where there are unknown ancestors) are shown in red. The only way to get a more exact COI is to add the missing dogs. If there are too many dogs missing, the COI can show 0.000%. .
Inbreeding coefficient
The Inbreeding Coefficient (IC) or Coefficient of Inbreeding (COI) or Coefficient of Kinship of an individual is defined as the probability that the two genes this individual has in a locus are identical by descent, i.e. they are both inherited from a common ancestor.
The calculation of the inbreeding coefficient is done to a given pedigree depth (number of generations): the greater the depth of the pedigree, the greater the chance of finding new common ancestors, and the higher the inbreeding coefficient.
It only makes sense to compare the inbreeding coefficients of different pedigrees if the number of generations used for the calculation are the same and the pedigrees are complete for the generations!
Partial inbreeding coefficient
The partial inbreeding coefficients, Fij , measure the probability that the alleles at an arbitrary locus in individual i are identical by descent and that the alleles were derived from an allele in founder j.
The partial inbreeding coefficients of the ancestors of an individual can be seen as their "contribution" to this individual's COI, i.e. in a full pedigree the sum of all partial COIs of all ancestors of the individual must equal the individual's COI!
Ancestors contributing the most to an individual's COI do not automatically have the highest inbred percentage. By being a closer relative (grandparent, great-grandparent) a dog with a low inbred percentage might have a larger contributing factor than other dogs with a higher inbred percentage. The dog you selected for pedigree analysis will have most in common with the ancestors having the highest partial inbreeding coefficient.
Click here to go to Blood Calculation/Ancestors loss
Calculations for: future litter (Litter Whelped May 30, 2007)
Coefficient of Inbreeding (COI): 5.246%
Sire: "Red Man" CH Hosanna's Garnet COI: 1.652% Dam: "Happy" Hosanna Amazing Peace COI: 2.459%| Ancestors count | Gen 1 | Gen 2 | Gen 3 | Gen 4 | Gen 5 | Gen 6 | Gen 7 | Gen 8 | Gen 9 | Gen 10 | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Count of distinct known Ancestors (over 10 generations) | 711 | 2 | 4 | 8 | 16 | 29 | 56 | 103 | 165 | 267 | 433 |
| Total count of possible Ancestors (over 10 generations) | 2046 | 2 | 4 | 8 | 16 | 32 | 64 | 128 | 256 | 512 | 1024 |
