Table 1 Genetic and physical map of rat chromosomes and chromosome wide recombination rates

	Number of Markers	Male (cM)	Female (cM)	Average (cM)	Physical Size (Mb)	Recombination Rate (cM/Mb)	Average (cM)	Physical Size (Mb)	Recombination Rate (cM/Mb)
chr1	9,098	134.4	146.0	140.2	282.8	0.50	149.3	267.4	0.56
chr2	10,440	122.0	135.5	128.8	266.4	0.48	112.4	255.3	0.44
chr3	6,142	95.4	113.1	104.2	177.7	0.59	91.5	166.0	0.55
chr4	6,930	100.5	110.7	105.6	184.2	0.57	102.2	186.1	0.55
chr5	6,859	99.3	111.8	105.6	173.7	0.61	105.7	171.6	0.62
chr6	5,747	81.4	94.9	88.1	148.0	0.60	85.2	134.2	0.63
chr7	5,157	91.6	99.4	95.5	145.7	0.66	88.5	141.6	0.62
chr8	4,759	83.0	99.6	91.3	133.3	0.68	84.1	126.8	0.66
chr9	3,761	72.8	83.9	78.3	122.1	0.64	78.3	109.5	0.71
chr10	4,479	88.0	94.3	91.1	112.6	0.81	92.8	101.2	0.92
chr11	2,788	56.0	66.8	61.4	90.5	0.68	39.0	73.6	0.53
chr12	2,108	53.9	52.4	53.2	52.7	1.01	51.9	43.6	1.19
chr13	4,869	59.6	70.3	64.9	114.0	0.57	43.9	75.1	0.58
chr14	4,519	72.3	74.1	73.2	115.5	0.63	70.9	105.7	0.67
chr15	2,991	64.4	79.2	71.8	111.2	0.65	63.8	106.1	0.60
chr16	3,806	62.5	61.0	61.8	90.7	0.68	45.5	76.6	0.59
chr17	2,679	61.2	74.4	67.8	90.8	0.75	43.9	91.0	0.48
chr18	3,223	55.3	63.1	59.2	88.2	0.67	52.3	84.7	0.62
chr19	2,360	51.2	58.5	54.8	62.3	0.88	48.1	56.4	0.85
chr20	1,890	47.2	54.7	51.0	56.2	0.91	48.2	50.6	0.95
chrX	1,165	37.1	82.8	59.9	160.0	0.37	44.6	130.8	0.34
Total	95,769	1,589	1,826	1,708	2,619	0.66	1,542	2,554	0.65