Table 3.

Separate rates on branches estimated from the gene family data in the Bacillaceae (B1, B2, B3) clades

Models	Parameters	B1	B2	B3
( μ 1=μ 2)ER	μ	2.940	0.638	0.459
	LnL	-21411	-23273	-31405
( μ 1≠μ 2)ER	μ 1	4.430	0.674	0.477
	μ 2	0.306	0.526	0.344
	LnL	-21045	-23267	-31395
	2 ΔLnL	732 ∗∗∗	14 ∗∗∗	20 ∗∗∗

μ ₁is for external branches, while μ ₂ is for internal branches on each tree as illustrated in Figure 1B.

^∗∗∗ P<0.001 (df=1), as 2 ΔLnL approximately follows a χ ²-distribution.