Table 6. Summary of likelihood ratio test statistics for the nested models analysis.

Comparisons	Model	Log(P)	2LLR	df	P-value
Lineage A versus BC	ABC0D (m1=0)	−41.8030	80.2224	1	<0.001***
	ABCD0 (m2=0)	−104.8120	206.2405	1	<0.001***
	ABC00 (m1=m2=0)	−460.5170	917.6505	2	<0.001***
	ABCDD (m1=m2>0)	−7.1385	10.8935	1	<0.001***
Lineage B versus C	ABC0D (m1=0)	−95.5654	186.0926	1	<0.001***
	ABCD0 (m2=0)	−112.5921	220.1460	1	<0.001***
	ABC00 (m1=m2=0)	−460.5170	915.9959	2	<0.001***
	ABCDD (m1=m2>0)	−23.4243	41.8103	1	<0.001***
Lineage A versus C	ABC0D (m1=0)	−102.5104	203.9763	1	<0.001***
	ABCD0 (m2=0)	−69.5419	138.0393	1	<0.001***
	ABC00 (m1=m2=0)	−460.5170	919.9896	2	<0.001***
	ABCDD (m1=m2>0)	−17.5071	33.9697	1	<0.001***

df, degrees of freedom; 2LLR, likelihood ratio statistics. ***P-value, significance level.