Table 3.

The Ka/Ks ratios of duplicated MPK genes in Hevea.

Paralogous Genes	Ka	Ks	Ka/Ks	Selective Pressure
HbMAPK11/HbMPK19–HbMAPK16	0.0182	0.2533	0.0719	Purifying selection
HbMAPK3–HbMAPK6	0.0192	0.2068	0.0928	Purifying selection
HbMAPK10–HbMAPK12	0.0174	0.2326	0.0748	Purifying selection
HbMAPK8/HbMPK15–HbMAPK9	0.0034	0.1376	0.0247	Purifying selection

Ka, nonsynonymous substitution rate; Ks, synonymous substitution rate.