Inbreeding (COI) for every bird and every pairing

MyPigeons.net works out the coefficient of inbreeding from the pedigrees you already keep, and shows it on each bird and on each pair before you put them together.

On every bird

Once a pigeon has both parents filled in, its page shows its coefficient of inbreeding, how the figure reads, and each common ancestor with the share it adds. Figures are worked out with Wright's path method over up to ten generations of your records, and an inbred ancestor's own inbreeding is counted too.

Before you pair

When you add a pair, the figure for their young appears as soon as you have picked the cock and the hen, so you can try several hens against a cock before deciding. The pair's page keeps showing it afterwards, and the dialog tells you if the two birds are parent and child, full siblings or half siblings.

Only as complete as your pedigrees

A COI can only count ancestors you have recorded, so when only a few generations are known the page says the real figure may be higher. Scanning old pedigrees is the quick way to add depth.

Don't have an account? Try the free inbreeding calculator, or read what the numbers mean.

Related

• Pigeon inbreeding calculator
• Pigeon inbreeding and COI explained
• Pigeon breeding records