Table 6. Branch-site test of positive selection.

gene	LRT	Positively selected sites
atpE	0.0484	2T→K, 17S→C, 41A→N, 64M→W, 132V→W
cemA	0.0021	55N→R, 76Y→K, 161W→F, 190I→F, 204I→C
clpP	0.0081	26R→V, 48V→T, 86F→T, 112I→P, 134E→R, 182T→D
rpoB	0.0352	90R→F, 338G→K, 1026G→N
rps11	0.0082	54V→P, 62A→S, 82A→R, 105L→S, 115R→A, 120L→R

The numberings of amino acids are those of Zea mays [45]. Positively selected sites were inferred at P _b = 95% with those reaching 99% shown in bold italic. The analyses were carried out for the 16 genes selected in Table 5, and only genes with positively selected sites and with P<0.05 (LRT) are listed.