Ancestral polymorphism at the major histocompatibility complex (MHCIIβ) in the Nesospiza bunting species complex and its sister species (Rowettia goughensis)

Table 2 Parameter estimates and results from four selection models as implemented in CODEML

Model	Log-likelihood	Parameter estimates	Positively selected sites
M1a (nearly neutral)	-576.502	p₀ = 0.385, p1 = 0.615, ω0 = 0.038,	Not allowed
		ω1 = 1.000
M2a (positive selection)	-574.685	p₀ = 0.311, p1 = 0.628, p2 = 0.061 ,	None
		ω0 = 0.000, ω1 = 1.000 , ω2 = 4.847
M7 (beta)	-576.474	p = 0.033, q = 0.018	Not allowed
M8 (beta and omega)	-574.720	p₀ = 0.941, p1 = 0.059, p = 0.028,	37 N
		q = 0.015, ω = 4.612

ISSN: 2730-7182