Table 1.
The Ka/Ks ratios and estimated absolute dates for the duplication events between the duplicated ZmPP genes
| Duplicated pair | Ka/Ks | Date (Mya) | Duplicate type | Purifying selection | Group |
|---|---|---|---|---|---|
| ZmPP53/ZmPP132 | 0.2091 | 13.02307692 | Segmental | Yes | PP2C/PP2C |
| ZmPP56/ZmPP130 | 0.35128 | 13.86153846 | Segmental | Yes | PP2C/PP2C |
| ZmPP107/ZmPP127 | 0.26416 | 18.2 | Segmental | Yes | PP2C/PP2C |
| ZmPP134/ZmPP66 | 0.10751 | 86.57692308 | Segmental | Yes | PP2C/PP2C |
| ZmPP8/ZmPP147 | 0.13034 | 20.53846154 | Segmental | Yes | PP2C/PP2C |
| ZmPP7/ZmPP148 | 0.39908 | 10.06153846 | Segmental | Yes | PP2C/PP2C |
| ZmPP24/ZmPP77 | 1.29469 | 5.507692308 | Segmental | No | PP2C/PP2C |
| ZmPP30/ZmPP155 | 0.15067 | 12.1 | Segmental | Yes | PP2C/PP2C |
| ZmPP4/ZmPP151 | 0.10791 | 16.53846154 | Segmental | Yes | PP2C/PP2C |
| ZmPP21/ZmPP80 | 0.14157 | 21.40769231 | Segmental | Yes | PP2C/PP2C |
| ZmPP28/ZmPP92 | 0.16562 | 67.48461538 | Segmental | Yes | PP2C/PP2C |
| ZmPP83/ZmPP99 | 0.08266 | 14.23846154 | Segmental | Yes | PP2C/PP2C |
| ZmPP41/ZmPP116 | 0.11765 | 16.73846154 | Segmental | Yes | PP2C/PP2C |
| ZmPP27/ZmPP152 | 1.60306 | 16.60769231 | Segmental | No | PP2C/PP2C |
| ZmPP152/ZmPP158 | 2.32622 | 11.17692308 | Segmental | No | PP2C/PP2C |
| ZmPP158/ZmPP27 | 0.21536 | 12.32307692 | Segmental | Yes | PP2C/PP2C |
| ZmPP72/ZmPP86 | 0.11398 | 16.06153846 | Segmental | Yes | PP2C/PP2C |
| ZmPP76/ZmPP84 | 0.09925 | 15.34615385 | Segmental | Yes | PP2C/PP2C |
| ZmPP122/ZmPP129 | 0.19247 | 65.58461538 | Segmental | Yes | PP2C/PP2C |
| ZmPP95/ZmPP66 | 0.07717 | 30.7 | Segmental | Yes | PP2C/PP2C |
| ZmPP9/ZmPP141 | 0.18169 | 11.17692308 | Segmental | Yes | PP2C/PP2C |
| ZmPP29/ZmPP156 | 0.16686 | 13.23076923 | Segmental | Yes | PP2C/PP2C |
| ZmPP42/ZmPP118 | 0.10881 | 14.13846154 | Segmental | Yes | PP2C/PP2C |
| ZmPP85/ZmPP100 | 1.28064 | 17.76153846 | Segmental | No | PP2C/PP2C |
| ZmPP23/ZmPP78 | 0.17848 | 23.23076923 | Segmental | Yes | PP2C/PP2C |
| ZmPP37/ZmPP110 | 0.25391 | 15.23846154 | Segmental | Yes | PP2C/PP2C |
| ZmPP33/ZmPP68 | 0.18219 | 16.76153846 | Segmental | Yes | DSP/DSP |
| ZmPP52/ZmPP131 | 0.12905 | 14.00769231 | Segmental | Yes | DSP/DSP |
| ZmPP54/ZmPP106 | 0.24256 | 70.78461538 | Segmental | Yes | DSP/DSP |
| ZmPP67/ZmPP133 | 0.33671 | 44.04615385 | Segmental | Yes | DSP/DSP |
| ZmPP94/ZmPP133 | 2.1275 | 11.94615385 | Segmental | No | DSP/DSP |
| ZmPP94/ZmPP101 | 1.8272 | 13.8 | Segmental | No | DSP/DSP |
| ZmPP101/ZmPP133 | 0.13011 | 13.36153846 | Segmental | Yes | DSP/DSP |
| ZmPP11/ZmPP50 | 0.05879 | 15.17692308 | Segmental | Yes | PP2A/PP2A |
| ZmPP11/ZmPP81 | 0.01588 | 105.6230769 | Segmental | Yes | PP2A/PP2A |
| ZmPP19/ZmPP81 | 0.05683 | 14.75384615 | Segmental | Yes | PP2A/PP2A |
| ZmPP22/ZmPP79 | 0.00792 | 13.59230769 | Segmental | Yes | PP2A/PP2A |
| ZmPP75/ZmPP88 | 0.05525 | 9.884615385 | Segmental | Yes | PP2A/PP2A |
| ZmPP2/ZmPP3 | 0.10884 | 8.269230769 | Tandem | Yes | PP2C/PP2C |
| ZmPP2/ZmPP4 | 0.12221 | 5.853846154 | Tandem | Yes | PP2C/PP2C |
| ZmPP3/ZmPP4 | 0.1199 | 6.030769231 | Tandem | Yes | PP2C/PP2C |
| ZmPP5/ZmPP6 | 0.96739 | 84.93076923 | Tandem | Yes | PP2A/PP2C |
| ZmPP60/ZmPP61 | 0.36275 | 41.66923077 | Tandem | Yes | PP2C/PP2C |
| ZmPP119/ZmPP120 | 0.77549 | 49.03076923 | Tandem | Yes | PP2A/DSP |
| ZmPP138/ZmPP139 | 0.43648 | 2.361538462 | Tandem | Yes | PP2C/PP2C |
| ZmPP141/ZmPP142 | 0.57337 | 85.86153846 | Tandem | Yes | PP2C/PP2C |
| ZmPP144/ZmPP145 | 0.68466 | 50.03076923 | Tandem | Yes | PP2C/DSP |
*Ka/Ks < 1 means purifying selection.