TABLE 2

Estimates of QTL parameters and empirical powers (α = 0.05) under different levels of marker polymorphism

MethodMarker allelescMAEmbedded Image Embedded Image Embedded Image Power (%)
Fixed modelTwo27.84 (10.32)0.130 (0.099)0.071 (0.202)0.918 (0.061)89
Four24.99 (8.65)0.130 (0.074)0.142 (0.144)0.931 (0.057)94
Eight25.76 (9.08)0.123 (0.078)0.143 (0.147)0.922 (0.064)93
Random modelTwo27.08 (12.76)0.128 (0.091)0.104 (0.088)0.979 (0.066)89
Four25.26 (8.46)0.123 (0.067)0.144 (0.154)0.977 (0.063)94
Eight25.64 (8.88)0.120 (0.075)0.150 (0.144)0.963 (0.068)94
  • Standard errors of the estimates, given in parentheses, are calculated by the standard deviations among 100 replicated simulations.

  • cMA, estimated QTL position in cM; Embedded Image , estimated additive variance of the QTL, the true Embedded Image being 0.125; Embedded Image , estimated dominance variance of the QTL, the true Embedded Image being 0.125; Embedded Image , estimated residual variance, the true Embedded Image being 1.0.