We have analyzed SNP data to define relatedness between individuals, including K0, K1, and K2 which are estimates of the Cotterman coefficients of relatedness k0, k1, and k2. This web page provides access to an executable to run kcoeff, a program that accepts SNP genotype data as input and calculates K0, K1, and K2.

We recommend using SNPduo++ to measure the IBS2*_ratio (IBS2*/[IBS2* + IBS0]):

SNPduo++ a command-line version of the program
Requires tfam/tped map/ped format
We plot our results using Partek software.

Stevens EL, Heckenberg G, Roberson EDO, Baugher JD, Downey TJ, et al. (2011) Inference of Relationships in Population Data Using Identity-by-Descent and Identity-by-State. PLoS Genet 7(9): e1002287. doi:10.1371/journal.pgen.1002287 PMID: 21966277

This page updated May 15, 2014.