TABLE 7

Estimates of QTL parameters and empirical powers (α = 0.05) under different sampling strategies (number of families × number of individuals per family)

MethodSampling strategycMAEmbedded Image Embedded Image Embedded Image Power (%)
Fixed model1 × 50031.87 (20.04)0.141 (0.240)0.189 (0.489)1.221 (2.415)77
3 × 16726.24 (9.85)0.143 (0.151)0.141 (0.329)0.977 (0.060)92
6 × 8325.87 (10.23)0.123 (0.092)0.121 (0.126)0.976 (0.064)91
10 × 5024.99 (4.65)0.130 (0.074)0.142 (0.144)0.931 (0.057)97
15 × 3325.16 (9.51)0.130 (0.074)0.125 (0.074)0.899 (0.059)94
20 × 2526.82 (12.58)0.133 (0.069)0.133 (0.085)0.851 (0.058)94
Random model1 × 50030.42 (19.83)0.199 (0.456)0.208 (0.518)0.973 (0.084)76
3 × 16725.90 (10.51)0.159 (0.170)0.166 (0.508)0.989 (0.063)91
6 × 8327.72 (13.54)0.133 (0.095)0.152 (0.228)0.972 (0.074)95
10 × 5025.26 (4.46)0.123 (0.067)0.144 (0.154)0.977 (0.063)96
15 × 3326.59 (6.48)0.138 (0.083)0.141 (0.132)0.955 (0.078)96
20 × 2526.36 (11.39)0.125 (0.067)0.134 (0.100)0.945 (0.062)92
50 × 1027.20 (10.41)0.124 (0.073)0.136 (0.072)0.889 (0.081)85
100 × 535.10 (21.00)0.136 (0.113)0.135 (0.074)0.770 (0.084)61
  • Standard errors of the estimates, given in parentheses, are calculated by the standard deviations among 100 replicated simulations.