Table 4. Likelihood ratio test statistics (−2ΔlnL) compare models with selection (boldface) to preceding neutral models on 5′ end containing sequences from Papaver, Argemone and Platystemon.

a)
Model	Likelihood	−2ΔlnL	p-value (df)	Selected sites
M1	−6410.82			N/A
M2	−6406.15	9.34	p<0.01 (2)	107, 119
M3	−6374.01	73.62	p<<0.01 (3)	None
M7	−6370.63			N/A
M8	−6366.94	7.38	p<0.05 (2)	107*, 119

Posterior probabilities for sites under selection are ≥0.95 except when followed by an asterisk, in which case 0.90≤p≤0.95.

5′ Alignment of 10 Papaver, 11 A. munita and 11 P.calfornicus sequences (a). 5′Alignment of 11 A. munita and 11 P.californicus sequences only (b).