Table 2. Characteristics of the linkage groups in the ultra-dense SNP map.

LG	Bin number	Marker number	Total length (cM)	Average bin interval/ marker interval (cM)	Gap number (>5 cM in length)
LG1	485	4482	245.85	0.51/0.05	1
LG2	94	1082	152.35	1.62/0.14	6
LG3	499	4742	325.49	0.65/0.07	6
LG4	205	2080	230.51	1.12/0.11	3
LG5	162	1637	185.36	1.14/0.11	3
LG6	286	2923	257.08	0.9/0.09	7
LG7	249	2520	253.96	1.02/0.1	14
LG8	222	2319	180.39	0.81/0.08	3
LG9	205	1808	295.41	1.44/0.16	10
LG10	114	1273	203.81	1.79/0.16	9
LG11	257	2839	170.76	0.66/0.06	1
LG12	151	1606	182.38	1.21/0.11	3
LG13	112	882	297.93	2.66/0.34	12
Total	3041	30193	2981.28	0.98/0.1	78