slides in pdf format - Department of Statistics - Rice University

Estimate Inbreeding Coef. from Pedigree Data
Wright’s (1922) formula:
F I = ∑ i
( 1
2
) ni
(1 + F Ai )
where i is the ith common ancestor, n i is
the number of individuals inside the loop
I → A i → I.
For the left pedigree, n G = 2,
F I =
( 1
2
) 2
(1 + F G ) = 1 4
Keck Fellows Meeting, July 2004 14