Table 3.

Distribution of genes in the studied duplicated regions in B. napus genome.

		E block		J block		R block		U block		W block
		Number	Percentage	Number	Percentage	Number	Percentage	Number	Percentage	Number	Percentage
Retained in 6 regions	Total genes	34	2	50	4	34	5	61	3	25	2
	Single copy	29	85	32	64	20	59	42	69	17	68
	Multi-copies	5	15	18	36	14	41	19	31	8	32
Retained in 5 regions	Total genes	79	5	76	5	34	5	127	6	35	3
	Single copy	56	71	57	75	28	82	99	78	25	71
	Multi-copies	23	29	19	25	6	18	28	22	10	29
Retained in 4 regions	Total genes	261	18	277	20	148	21	391	19	126	10
	Single copy	211	81	217	78	124	84	311	80	87	69
	Multi-copies	50	19	70	25	24	16	80	20	39	31
Retained in 3 regions	Total genes	243	17	229	16	131	19	331	16	151	12
	Single copy	195	80	180	79	103	79	261	79	123	81
	Multi-copies	48	20	49	21	28	21	70	21	28	19
Retained in 2 regions	Total genes	599	42	540	39	235	34	761	36	353	29
	Single copy	519	87	452	84	207	88	631	83	308	87
	Multi-copies	80	13	88	16	28	12	130	17	45	13
Retained in 1 region	Total genes	462	32	505	36	230	33	817	39	520	43
	Single copy	427	92	463	92	213	93	757	93	472	91
	Multi-copies	35	8	42	8	17	7	60	7	48	9
Total	Total genes	1678	100	1677	100	812	100	2488	100	1210	100
	Single copy	1437	86	1401	84	695	86	2101	84	1032	85
	Multi-copies	241	14	286	17	117	14	387	16	178	15

For each block, the number of orthologous A. thaliana genes has been identified in the duplicated regions (total genes). These genes can be retained in one of the duplicated regions of each block or up to the six duplicated regions. In each region, one gene can be represented in one copy (single copy) or in two or more copies (multi-copies).