TABLE 4

Estimating h under mixed dominance and overdominance in highly selfing populations by Mukai's approach

h2Embedded Image αEmbedded Image
−0.0101.150.357 (0.000)
41.020.285 (0.041)
50.990.270 (0.039)
100.850.231 (0.047)
1000.050.039 (0.029)
2000.020.013 (0.023)
−0.101.150.357 (0.000)
31.030.268 (0.051)
410.268 (0.051)
100.800.200 (0.058)
1000.03−0.037 (0.036)
−0.301.150.357 (0.000)
21.040.290 (0.043)
310.264 (0.050)
100.710.133 (0.084)
1000.01−0.207 (0.051)
  • U1, h1, and s1 are the parameters of dominant mutations, while h2 and s2 are the parameters of overdominant mutations. Embedded Image is the mean number of overdominant loci per genome. α is a measure of relative contribution of dominance and over-dominance to heterosis (see text for a detailed definition). Simulations for data were performed under U1 = 1, h1 = 0.36, s1 = 0.03, and s2 = 0.03, which approximate previous experimental data (Mukai et al. 1972; Kibota and Lynch 1996). Simulation results not shown here indicate no influence on the conclusion by employing different parameters of U1, h1, and s1. Mutation effects are assumed to be constant for dominant and overdominant mutations.