Table 2. Divergence between paralogous LOX gene pairs in Populus.

Paralogous pairs	Ka	Ks	Ka/Ks	Duplication date (MY)
PtLOX1–PtLOX2	0.1418	0.5618	0.2524	30.86813187
PtLOX3–PtLOX4	0.0029	0.0146	0.2005	0.802197802
PtLOX5–PtLOX6	0.0732	0.0288	0.254	1.582417582
PtLOX7–PtLOX9	0.0072	0.0181	0.3982	0.994505495
PtLOX11–PtLOX15	0.0425	0.1884	0.2253	10.35164835
PtLOX12–PtLOX14	0.0578	0.2396	0.2412	13.16483516
PtLOX18–PtLOX19	0.0224	0.0327	0.6847	1.796703297