Use Pedigree F Accumulated when you need to accumulate an inbreeding coefficient as the base coefficient plus the remaining relationship budget times one path contribution. Enter Base F and Path contribution using the definitions and units below so the result can be reproduced.

Base F

Base inbreeding coefficient already accumulated.

Path contribution

Contribution of one common ancestor path.

The published tool contract uses this rule: Accumulate an inbreeding coefficient as the base coefficient plus the remaining relationship budget times one path contribution.^[1]

Accumulated inbreeding F

The calculated accumulated inbreeding f.

The calculation does not propagate measurement uncertainty, sampling error, or biological and chemical variability. Base F must remain between 0 and 1; Path contribution must remain between 0 and 1.

Retain the original Base F and Path contribution values and their units alongside the result. Pedigree Inbreeding Loop is useful when you instead need to compute the path contribution to an offspring inbreeding coefficient for one common ancestor loop. Inbreeding Coefficient provides another view by helping you compute the inbreeding coefficient f = (he - ho) / he, which may be negative when heterozygote excess occurs.

• Pedigree Inbreeding Loop

  Compute the path contribution to an offspring inbreeding coefficient for one common ancestor loop.

• Inbreeding Coefficient

  Compute the inbreeding coefficient f = (he - ho) / he, which may be negative when heterozygote excess occurs.

• Coancestry Coefficient

  Compute the coancestry or kinship phi of two individuals as half of their additive relationship coefficient.