TABLE 2.

Ka/Ks calculation and divergence times of the duplicated RchDof gene pairs in syntenic blocks.

Duplicated gene pairs		Group	Ka	Ks	Ka/Ks	Duplicated type	Date (Mya)
RchDof1	RchDof23	C2.1	0.39	1.27	0.30	WGD	42.40
RchDof3	RchDof23	C2.1	0.42	1.25	0.34	WGD	41.58
RchDof8	RchDof12	D1	0.33	1.40	0.24	WGD	46.76
RchDof5	RchDof17	B1/C1	1.09	3.17	0.34	WGD	105.76
RchDof7	RchDof24	A/C1	0.69	3.19	0.22	WGD	106.39
RchDof9	RchDof18	B1	0.51	2.11	0.24	WGD	70.46
RchDof12	RchDof21	D1	0.37	1.10	0.33	WGD	36.79
RchDof14	RchDof15	C1/B2	0.97	3.55	0.27	Tandem	118.37

Ka, non-synonymous substitution rate; Ks, synonymous substitution rate; Mya, millions of years ago; WGD, segmental duplication.