TABLE 1

Calculation of the matrix of IBD probabilities, Gp

Base haplotypes
Gp =GHMHSPHS
GH[0][0][1a]
MHS[0][0][1a]
PHS[1a][1a][1b]
• GH, grandsire haplotypes; MHS, maternal haplotypes of sires; PHS, paternal haplotypes of sires. Gp is symmetric and the diagonals = 1. The blocks denoted by [0] are calculated by the method of Meuwissen and Goddard (2000). The recursive Equation 1 is used first to calculate blocks [1a] and then to calculate block [1b].