Table 2. Summary statistics for each of the 42 constructed linkage groups. No. Mapped Loci corresponds to the number of unique RAD contigs mapped to each linkage group. Male and Female map lengths are in centimorgans (cM). No. Unique Positions corresponds to the number of unique linkage map positions to which RAD loci were assigned. Female:Male Ratio is the ratio of Female Length and Male Length in centimorgans.

Name	No. Mapped Loci	Male Length (cM)	Female Length (cM)	Female:Male Ratio	No. Unique Positions
Sna1	878	85.28	106.3	1.246	217
Sna2	789	71.98	134.08	1.863	207
Sna3	761	59.12	134.64	2.277	244
Sna4	648	66.01	106.22	1.609	207
Sna5	618	50.95	106.98	2.100	221
Sna6	515	77.88	103.44	1.328	223
Sna7	514	73.49	126.94	1.727	195
Sna8	497	92.87	124.81	1.344	157
Sna9	460	48.39	54.72	1.131	112
Sna10	406	54.29	55.02	1.013	112
Sna11	404	42.38	58.43	1.379	100
Sna12	395	73.61	54.69	0.743	121
Sna13	389	34.02	51.78	1.522	116
Sna14	377	59.65	51.85	0.869	110
Sna15	360	48.12	65.02	1.351	101
Sna16	358	53.9	55.51	1.030	102
Sna17	357	48.72	57.73	1.185	95
Sna18	356	44.67	58.01	1.299	101
Sna19	348	41.15	53.32	1.296	109
Sna20	344	36.93	53.35	1.445	102
Sna21	340	41.96	53.44	1.274	92
Sna22	333	70.57	78.73	1.116	109
Sna23	332	61.14	56.31	0.921	106
Sna24	325	28.44	68.78	2.418	105
Sna25	322	63.3	56.18	0.888	98
Sna26	319	36.71	52.1	1.419	95
Sna27	317	33.52	49.03	1.463	94
Sna28	313	37.01	50.81	1.373	102
Sna29	312	48.84	50.59	1.036	86
Sna30	310	66.35	52.65	0.794	83
Sna31	307	36.9	53.94	1.462	93
Sna32	302	56.79	55.84	0.983	102
Sna33	286	50.85	51.02	1.003	89
Sna34	255	52.77	50.02	0.948	85
Sna35	244	42.17	53.94	1.279	94
Sna36	242	30.19	46.4	1.537	80
Sna37	225	26.84	57.54	2.144	82
Sna38	218	35.06	53.87	1.537	83
Sna39	194	22.56	67.59	2.996	91
Sna40	185	33.84	71.95	2.126	90
Sna41	172	2.12	55.58	26.217	60
Sna42	113	1.97	43.07	21.863	60