Table 1.
Comparison of likelihood scores under different phylogenetic estimators for two chloroplast regions: trnL + trnL−trnF and rbcL using the appropriate model of sequence evolution (Tamura Nei or GT + I + Γ)
| Taxa included (df) | Region | Tree | −Log L0 (nonclock) | −Log L1 (clock) | Λ | P |
|---|---|---|---|---|---|---|
| Agavaceae + monocots (59) | trnL + trnL−trnF | MP | 1,328.56 | 1,364.7 | 72.36 | <0.05 |
| ME | 1,331.8 | 1,367.74 | 71.80 | <0.05 | ||
| Monocots − grasses (242) | rbcL | MP | 61,964.3 | 62,847.9 | 1,767.2 | <0.0001 |
| ME | 62,847.6 | 63,607.2 | 1,507.2 | <0.0001 |
The likelihood ratio test is based on the difference between the two models. P values are based on a χ2 distribution with n− 2 degrees of freedom. MP, maximum parsimony; ME, minimum evolution.