
UNDERSTANDING COI WITH THE AKKPS
THE COEFFICIENT OF INBREEDING

PLEASE NOTE THE AKKPS DOES NOT HAVE LIMITATIONS ON A COI.
BASIC COI - Public Herd Book & Registration Certificates
There are several different COI Method Calculators.
The AKKPS Herd Book uses the Wright’s Method to compute COI using 12 generations.
In the past the AKKPS has used 2 other Herd Books that computed COI:
- Zoo Easy - 6 generation COI - 2013-2017
- Capable Computing - 9 generation COI - 2017 - 2022
What is COI? (click to read)
What is Wright’s COI Method?(click to read)
Who is Sewall Wright? (click to read)
Approximate COI percentages between related animals - Percentages will depend on how many generations are used to compute the COI (see chart below)
25.00% – parent/offspring or full brother/sister cross.
12.50% – half sib, grandparent or double first cousins crosses.
9.75% – great uncle or aunt/great niece or nephew cross.
6.25% – first cousins
Graph credit (click here)

DETAILED COI - Members Only Advanced Herd Book Features
The AKKPS offers the AKKPS Members when logged into the AKKPS Member Portal a feature that accesses advanced COI detailed reports.
This feature is very similar to AVK - Ancestor Loss Coefficient.
AVK is the German acronym for AhnenVerlust-Koeffizient.
AVK computes the number of ancestors and how many times they occur in an animal's pedigree using the number of generations selected.
This feature can be used for 1 animal or for a Hypothetical Breeding.
The following are the features for a detailed report:
- Ability to pick number of generations COI is calculated
- Inbreeding loops
- Total Ancestors
- Unique Ancestors
- Common Ancestors
- Duplicate Ancestors
AKKPS COI DISCLAIMER
The AKKPS wants to offer the AKKPS Members as much information as possible to use or not to use within thier program.
The AKKPS does not impose guidelines of suitable, desirable, unsuitable, or desirable COI thresholds or require the AKKPS Members to use the COI tool.
The decision to use the COI calculator or not is best left up to each individual member.