1. What is the Coefficient of Inbreeding?

The Coefficient of Inbreeding (COI) measures the probability that two alleles at any locus in an individual are identical by descent from a common ancestor. It quantifies the genetic similarity resulting from line breeding in dogs.

2. How Does the Calculator Work?

The calculator uses the COI formula:

Where:

• \( n1 \) — Generations from sire to common ancestor
• \( n2 \) — Generations from dam to common ancestor

Explanation: The formula calculates the probability that two alleles from a common ancestor are inherited by both parents and passed to the offspring.

3. Importance of COI Calculation

Details: Calculating COI is essential for responsible dog breeding practices. It helps breeders understand the level of inbreeding and make informed decisions to maintain genetic diversity and reduce the risk of inherited disorders.

4. Using the Calculator

Tips: Enter the number of generations from the sire to the common ancestor (n1) and from the dam to the common ancestor (n2). Both values must be non-negative integers.

5. Frequently Asked Questions (FAQ)

Q1: What is considered a high COI value?
A: Generally, COI values above 6.25% indicate significant inbreeding. Values above 12.5% are considered high and may increase health risks.

Q2: How does COI affect dog health?
A: Higher COI values increase the risk of inherited disorders and reduce genetic diversity, which can impact overall health and vitality.

Q3: Should COI be the only factor in breeding decisions?
A: No, COI should be considered alongside health testing, temperament, and conformation to make responsible breeding choices.

Q4: How can I reduce COI in my breeding program?
A: Introduce unrelated bloodlines, avoid close relative matings, and use outcrossing strategies to maintain genetic diversity.

Q5: Is there a recommended maximum COI?
A: Many breed clubs recommend keeping COI below 5-6% over multiple generations to maintain genetic health.