Table 3.

Selection pressure analysis results obtained by four analytical methods

Codon	FEL		SLAC		FUBAR		MEME
	dN-dS	p-value	dN-dS	p-value	β-α	Post.Pro	β+	p-value
30	∞	0.074	1.49	0.14	0.18	0.86	1.277	0.097
63	∞	0.028	2.6	0.066	0.593	0.972	2.452	0.048
89	∞	0.033	2.078	0.068	0.449	0.946	2.6	0.047
90	∞	0.031	1.821	0.088	0.321	0.925	1.608	0.027
190	4.793	0.065	2.641	0.065	0.663	0.969	4.409	0.027
215	∞	0.073	1.12	0.27	0.14	0.82	1.01	0.12

When p-value was below 0.1 in SLAC, FEL, MEME and the posterior probability was above 0.9 in FUBAR, positive selection pressure signals were considered to acceptable. Positively selected sites were confirmed when positive selection pressure signals were identified by at least two methods. “∞” represents numerical infinity