TABLE 4

The MCMC output for three runs

No. runsaMethodsbλXλ3γ2λX3SX(½)cSX(1)cS3(½)cS3(1)c
1X0.0089 ± 0.00091.7 ± 0.28.8 ± 0.95.2 ± 0.6
30.0036 ± 0.00021.7 ± 0.17.9 ± 0.54.6 ± 0.3
X and 30.0094 ± 0.00070.0038 ± 0.00031.8 ± 0.22.5 ± 0.39.2 ± 0.75.1 ± 0.68.4 ± 0.74.6 ± 0.3
2X0.0094 ± 0.0011.8 ± 0.29.3 ± 1.05.2 ± 0.6
30.0035 ± 0.00021.7 ± 0.17.8 ± 0.44.7 ± 0.3
X and 30.0092 ± 0.00070.0038 ± 0.00021.8 ± 0.12.4 ± 0.29.0 ± 0.75.1 ± 0.48.3 ± 0.54.7 ± 0.3
3X0.0093 ± 0.00091.7 ± 0.29.1 ± 0.95.4 ± 0.6
30.0035 ± 0.00021.6 ± 0.17.7 ± 0.44.7 ± 0.3
X and 30.0092 ± 0.00070.0037 ± 0.00031.8 ± 0.12.5 ± 0.39.1 ± 0.75.2 ± 0.58.2 ± 0.64.7 ± 0.3
  • All estimates (mean ± SD) from the MCMC methods are summarized from the second half of 2000 iterations.

  • a Initial values for MCMC (±SD): run 1, θ= 3.0 (±0.1), λX = 0.03 (±0.001), λ3 = 0.01 (±0.0005), γ2 = 3.0 (±0.1); run 2, θ= 1.5 (±0.15), λX = 0.035 (±0.0015), λ3 = 0.005 (±0.0015), γ2 = 3.5 (±0.15); run 3, θ= 1.0 (±0.1), λX = 0.01 (±0.001), λ3 = 0.035 (±0.001), γ2 = 3.5 (±0.1).

  • b The MCMC simulations are run separately for observations from the X (X) or the third (3) chromosomes or jointly (X and 3).

  • c SX(½), the estimated number of hybrid male semisterility equivalents on the X chromosome, calculated as λXLX/θ, where LX (= 981) is the polytene band count on the X chromosome. SX(1), the estimated number of hybrid male full-sterility equivalents on the X chromosome, calculated as λXLX/θ/γ2. S3(½) and S3(1) are similarly calculated with L3 = 2200.