Table 5.
Best-fitting models and parameter values for separate (petA-psbJ, trnT-trnL, trnT-trnE, psbD-trnT) and combined datasets in this study
| Base frequencies |
Substitution model (rate matrix) |
||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Region | AIC selected model | A | C | G | T | A–C | A–G | A–T | C–G | C–T | G–T | I* | G* |
| petA-psbJ | TIM | 0·3623 | 0·1419 | 0·1185 | 0·3773 | 1·0000 | 0·8642 | 0·2735 | 0·2735 | 0·5067 | 1·0000 | 0 | Equal |
| trnT-trnL | TIM + G | 0·4190 | 0·0884 | 0·1238 | 0·3688 | 1·0000 | 0·0865 | 0·0596 | 0·0596 | 0·2375 | 1·0000 | 0 | 0·3479 |
| trnT-trnE | TVM + G | 0·3709 | 0·1337 | 0·1260 | 0·3695 | 1·0000 | 0·5281 | 0·2382 | 0·8342 | 0·5281 | 1·0000 | 0 | 0·6412 |
| psbD-trnT | K81uf + I + G | 0·3510 | 0·1391 | 0·1247 | 0·3853 | 1·0000 | 0·3110 | 0·1832 | 0·1832 | 0·3110 | 1·0000 | 0·5654 | 0·9177 |
| Combined analyses | TVM + I + G | 0·3731 | 0·1240 | 0·1254 | 0·3775 | 1·1519 | 0·3672 | 0·1489 | 0·4059 | 0·3672 | 1·0000 | 0·3310 | 0·8910 |
* I, Proportion of invariable sites; G, gamma distribution.