Positive Selection of Squalene Synthase in Cucurbitaceae Plants
Table 4
Parameter estimation and likelihood ratio tests for the two-ratio model.
Model
Parameter estimates
M0: one ratio
1
-29891.94
Branch-specific models
Two ratios (branch a)
2
-24451.31
,
Two ratios (fixed )
1
-24451.32
,
Two ratios (branch b)
2
-24444.73
,
Two ratios (fixed )
1
-24445.24
,
Two ratios (branch c)
2
-24454.01
,
Two ratios (fixed )
1
-24454.03
,
Two ratios (branch d)
2
-24454.53
,
Two ratios (fixed )
1
-24459.38
,
Two ratios (branch e)
2
-24450.66
,
Two ratios (fixed )
1
-24451.12
,
Two ratios (branch f)
2
-24453.23
,
Two ratios (fixed )
1
-24453.49
,
Selection analysis by a branch model was performed using CodeML implemented in PAML. lnL: loglikelihood; LRT: likelihood ratio test; : parameters in the calculation.
