Figure 4

Comparison of precision (a, b) and bias (c, d) when predicting GWIBD by Pedigree F₇ (black), ‘ideal markers’ (Marker IBD₇, red) and microsatellites (Marker IBS₇ with an IBD–IBS discrepancy of 13.3%, blue) in the empirical pedigree. The left and right panels are estimates from 1000 simulation runs in zebra finches and humans, respectively. The black solid line indicates the average precision and bias of pedigree-based estimates (Pedigree F₇) of inbreeding (±1 s.e.) which is not influenced by the number of markers (slight changes in precision and bias across the different numbers of markers are caused by random sampling noise in GWIBD). The dashed black line indicates Pedigree F₄ (±1 s.e.) and the dotted black line Pedigree F₃ (±1 s.e.). The red and blue lines indicate average precision and bias (±1 s.e.) of Marker IBD₇ and Marker IBS₇, respectively, for varying numbers of markers (100 kb genomic segments) used for predicting the inbreeding level of individuals (GWIBD₇) in the seventh generation of the empirical pedigree.