Table 2.
Likelihood analysis of the usp sequence datasets along three successive branches of the Mecopterida radiation
| Model | Likelihood Ratio Test | |||||
|---|---|---|---|---|---|---|
| |
No Shift |
Branch relaxation |
Branch positive selectionBranch positive selection |
Relaxation |
positive selection |
|
| |
M1a (nearly neutral) |
modified branch-site model A ω2 = 1 fixed |
modified branch-site model A |
test 1 |
test 2 |
|
| |
LnL (np) |
LnL (np) |
LnL (np) |
ω2 |
p-value |
p-value |
|
Branch A |
-11732.4 (55) |
-11713.2 (56) |
-11711.1 (57) |
999 |
6.6 10-11 |
4.2 10-2 |
|
Branch B |
-9769.8 (41) |
-9754.5 (42) |
-9750.9 (43) |
97.3 |
8.0 10-9 |
6.8 10-3 |
| Branch C | -6946.6 (25) | -6938.1 (26) | -6937.5 (27) | 4.75 | 1.1 10-4 | 0.56 |
LnL: log likelihood. np: number of parameters.