Table 1. Description of linkage groups of the Grand Rapids × Iceberg linkage map.

Linkage group	Number of AFLP markers	Number of SNP markers	Total number of markers	Length of linkage group in cM	Average interval between two subsequent markers in cM	Number of anchor markersc	Length of linkage group in reference map in cMd	Percentage covering of reference mape	Number of markers with distorted segregation
LG 1	31	3	34	71	2.1	2	144	49	0
LG 2a	17	29	46	168	3.7	16	152	111	2
LG 3	21	2	23	78	3.6	2	174	45	0
LG 4a	26	22	48	143	3.1	12	234	61	7
LG 5a	17	15	32	90	2.9	8	234	38	2
LG 6a	2	15	17	58	3.6	10	243	40	2
LG 7	20	17	38b	133	3.6	11	142	94	2
LG 8a	20	19	39	178	4.7	12	204	87	1
LG 9	22	9	31	98	3.3	7	159	62	10
Total	176	131	308b	1,017	3.3	80	1,586	64	26

^aCombined data for two sections of this linkage group.

^bData include a single phenotypic marker for white seed color (w gene).

^cSNP markers with known position on both Grand Rapids × Iceberg linkage map and reference map.

^dReference map was based on segregation of markers in the interspecific (L. sativa × L. serriola) mapping population³¹.

^eLength of Grand Rapids × Iceberg linkage map expressed as a percentage of length of reference linkage map.