TABLE 3

Mean and standard deviation of the maximum-likelihood estimates of recombination frequencies and the coefficient of double reduction over 100 replicates of simulation of a full-sib population comprising 200 autotetraploid individuals

Algorithm IAlgorithm-II
LocusG1G2rαEmbedded ImageEmbedded ImageEmbedded ImageEmbedded ImageEmbedded Image
L1AOOOOOOO0.000.0000.000 ± 0.000
L2OAOOOOOO0.100.0620.096 ± 0.06419.07 ± 8.480.095 ± 0.0470.065 ± 0.04720.10 ± 7.76
L3OOAAOOOO0.100.1090.153 ± 0.05327.11 ± 10.250.108 ± 0.0540.116 ± 0.06428.74 ± 8.98
L4OOAOOOOO0.050.1270.037 ± 0.02949.43 ± 11.620.058 ± 0.0390.142 ± 0.07148.18 ± 11.17
L5OOOAOOOO0.100.1580.131 ± 0.08412.37 ± 7.840.109 ± 0.0550.177 ± 0.09713.93 ± 6.94
L6OOOAAOOO0.050.1690.043 ± 0.02673.40 ± 12.640.051 ± 0.0280.176 ± 0.07374.72 ± 11.16
L7AOAOOOOO0.100.1890.218 ± 0.0843.47 ± 8.580.107 ± 0.0500.195 ± 0.0829.72 ± 5.38
L8AOOOOOOO0.050.1970.042 ± 0.02850.13 ± 10.790.058 ± 0.0380.194 ± 0.08652.56 ± 11.63
L9OAOOOOOO0.100.2110.149 ± 0.0768.88 ± 7.410.104 ± 0.0490.200 ± 0.09213.43 ± 6.69
L10AOOOOOOO0.050.2160.134 ± 0.07210.10 ± 7.650.086 ± 0.0390.210 ± 0.09815.65 ± 6.61
  • G1 and G2 are simulated parental genotypes at the 10 marker loci, r and α are the simulated values of recombination frequency between adjacent loci and the coefficient of double reduction. Also, LODr is the mean LOD score value for testing for significance of linkage. The simulation mimics multivalent pairings of a homologous chromosome that carries 10 dominant markers and the simulation data were analyzed by algorithm I proposed by Luo et al. (2001), which ignores the presence of double reduction, and by algorithm II that models double reduction.