Table 2.

Divergence between paralogous BURP gene pairs in Medicago.

Group	No.	Paralogous pairs	Ka	Ks	Ka/Ks	Duplication date (MY)	Duplicate Type
RD22	1	MtBURP1-MtBURP11	0.017	0.066	0.2599	5.385245902	T
	2	MtBURP4-MtBURP5	0.084	0.136	0.6166	11.13114754	T
BNM2	4	MtBURP18-MtBURP22	0.101	0.296	0.3414	24.2704918	T
	5	MtBURP20-MtBURP21	0.124	0.346	0.3578	28.3442623	T
PG1β	9	MtBURP28-MtBURP32	0.042	0.08	0.5267	6.581967213	T
USP	12	MtBURP13-MtBURP14	0.109	0.388	0.2804	31.7704918	T