Molecular evolution of Drosophila Sex-lethal and related sex determining genes

Table 2 Significant likelihood ratio tests for selection on Drosophila and tephritid Sxl and Drosophila ssx

Test	Line	Alternative M^a	Null M^a	2ΔL	df	P^b	Sites^c
1	a	Nearly Neutral	One ratio	189.21	1	< 0.0001	24
2-ssx	b	Local selection	Local relaxation	7.94	1	0.019	18
3-ssx	c	Local relaxation	Uniform Selection	193.70	2	< 0.0001	35

^aAlternative and null models, see Additional File 4, Table S2 for more information on models and Log-likelihood values, ^bP value calculated from a χ²distribution, ^cnumber of sites significant in Bayesian post-hoc tests (P < 0.05). The alignment, after deleting gaps, was composed of 265 codons.

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