Loop file contains information about pedigrees and pedigree member which should be used for breaking loops with MAKEPED utility. Breaking a loop is only needed if parametric linkage analysis is performed with autoqualitative (FASTLINK 4.1P) software.
Column 1: Pedigree identifier
Column 2: Individual's ID
Example of a pedigree (Pedigree ID 10566) with inbreeding loop:
And loops.dat file would include following line(s) for example:
10566 8
Which means this pedigree/loop will be broken from indivudual 8.
Last line of the file must be empty line!
Loop file is named as loops.dat.
Handbook of Human Genetic Linkage, Chapter 7, Joseph D. Terwilliger and Jurg Ott. Johns Hopkins University Press, Baltimore (1994)