Table 3. Results of Phylogenetic Analyses Evaluating Evolution of Selected Plastome Traits in Orobanchaceae.

	Constant-Variance Random Walk (H0) versus Directional Random Walk Model (H1) of Trait Evolution				Gradual (H0) versus Punctuated (H1) Trait Evolutiona			Covariance (H0) versus No Covariance (H1) among Traitsa
Traits Tested	-lnL H0b	-lnL H1	LRT	P Value	-lnL H1	LRT	P Value	-lnL H1	LRT	P Value
Parasitism and repeat density	89.654	83.138	13.032	0.001	83.577	0.878	0.349	87.978	8.802	0.003
Relative genome reduction and repeat density	140.136	131.557	17.158	<0.001	130.016	3.083	0.079	131.957	0.800	0.371
Parasitism and GC %	28.563	20.185	16.756	<0.001	20.304	0.237	0.626	20.389	0.406	0.524
Parasitism and coding GC %	25.285	15.825	18.920	<0.001	11.729	8.192	0.004	15.990	0.331	0.565
Parasitism and noncoding GC %	32.073	22.708	18.729	<0.001	22.786	0.156	0.692	23.145	0.874	0.350
Loss of photosynthesis and GC %	26.408	19.695	13.426	0.001	16.675	6.040	0.014	20.049	0.708	0.400
Loss of photosynthesis and coding GC %	20.260	13.016	14.490	<0.001	9.444	7.144	0.008	15.651	5.269	0.022
Loss of photosynthesis and noncoding GC %	30.146	22.663	14.966	<0.001	19.117	7.092	0.008	22.805	0.284	0.594

^aH₀ is the best supported model from the test constant-variance random walk versus directional random walk model.

^blnL, log likelihood.