Figure 3

Power with a true type 1 error rate of 1% in the case of equal half-sib families in a sample of 600 animals. The following conditions were tested i.e. true regression coefficient of 0.20 phenotypic standard deviation (σ _y ) with minimum allele frequency (MAF) of 50%, which is equivalent to 0.33 σ _y with MAF 10% or equivalent to 2% of phenotypic variance for a: regression model; b: GRAMMAR model; c: FASTA model; d: QTDT model.