Conserved microstructure of the Brassica B Genome of Brassica nigra in relation to homologous regions of Arabidopsis thaliana, B. rapa and B. oleracea

Table 4 Pair wise divergence time of genome segments based on synonymous base substitution rates

Region		A genome		C Genome		Arabidopsis
	Number of genes	Average Ks	Mya	Average Ks	Mya	Average Ks	Mya
B genome Contig A	15 genes	0.18 ± 0.07	6.073 ± 2.18	0.19 ± 0.06	6.60 ± 2.04	0.42 ± 0.10	14.30 ± 3.28
A genome Contig A				0.09 ± 0.05	3.22 ± 1.68	0.41 ± 0.09	13.68 ± 2.91
C genome Contig A						0.41 ± 0.09	13.96 ± 3.16
B genome Contig B	25 genes	0.20 ± 0.07	6.92 ± 2.25	0.22 ± 0.06	7.36 ± 2.10	0.42 ± 0.09	14.20 ± 2.99
A genome Contig B				0.09 ± 0.05	3.20 ± 1.65	0.43 ± 0.10	14.44 ± 3.24
C genome Contig B						0.45 ± 0.10	15.04 ± 3.31
B genome Contig C	16 genes	0.18 ± 0.06	6.30 ± 2.01	0.18 ± 0.07	6.06 ± 2.41	0.45 ± 0.13	15.07 ± 4.45
A genome Contig C				0.10 ± 0.06	3.47 ± 1.85	0.43 ± 0.10	14.54 ± 3.41
C genome Contig C						0.43 ± 0.11	14.39 ± 3.61
B genome Contig D	28genes	0.20 ± 0.11	6.81 ± 3.67	0.19 ± 0.09	6.34 ± 2.96	0.50 ± 0.14	16.69 ± 4.69
A genome Contig D				0.10 ± 0.06	3.59 ± 1.85	0.52 ±0.18	17.40 ± 5.86
C genome Contig D						0.50 ± 0.18	16.99 ± 5.99
B genome Contig E	7 genes	0.15 ± 0.04	5.17 ± 1.46	0.14 ± 0.04	4.91 ± 1.38	0.48 ± 0.19	16.03 ± 6.44
A genome Contig E				0.08 ± 0.05	2.97 ± 1.51	0.46 ± 0.18	15.47 ± 6.12
C genome Contig E						0.46 ± 0.18	15.59 ± 6.12
B genome Contig F	41 genes	0.19 ± 0.05	6.46 ± 1.91	0.18 ± 0.06	6.32 ± 1.98	0.47 ± 0.14	15.93 ± 4.70
A genome Contig F				0.08 ± 0.03	2.76 ± 1.11	0.48 ± 0.14	16.10 ± 4.64
C genome Contig F						0.47 ± 0.14	15.83 ± 4.65

ISSN: 1471-2164