Table 3. The number of markers, average interval (cM) ± standard deviation, maximum interval (cM) per linkage group, length (cM) of each linkage group of the consensus map of apple, and genome coverage (%) per linkage group.

Linkage group (LG)	Number of markers	Average interval per LG (cM) ±Standard deviation	Maximum interval (cM)	Linkage group length (cM)	Average Ge per LG*	Genome Coverage (%) per LG*
LG01	167	0.51±0.59	2.85	85.33	86.35	0.99
LG02	210	0.64±1.41	14.68	135.40	136.69	0.99
LG03	172	0.64±1.00	8.30	110.25	111.54	0.99
LG04	160	0.64±0.86	4.76	102.30	103.58	0.99
LG05	190	0.75±1.93	24.37	142.30	143.79	0.99
LG06	131	0.81±1.06	6.08	105.62	107.24	0.98
LG07	108	0.76±1.11	7.15	81.68	83.20	0.98
LG08	161	0.59±0.71	4.78	95.63	96.82	0.99
LG09	188	0.52±0.64	3.76	97.51	98.55	0.99
LG10	170	0.71±0.79	5.25	120.03	121.45	0.99
LG11	180	0.96±1.85	18.02	172.75	174.67	0.99
LG12	174	0.64±0.88	5.39	111.53	112.82	0.99
LG13	152	0.91±2.31	26.29	137.84	139.66	0.99
LG14	140	0.72±1.05	6.65	101.22	102.67	0.99
LG15	261	0.55±0.77	5.70	143.67	144.77	0.99
LG16	152	0.91±2.32	27.16	139.13	140.95	0.99
LG17	159	0.69±1.32	11.00	109.19	110.57	0.99
Total	2875			1991.38
Average	169±33	0.70±0.14		117.14±24.43

The consensus map was constructed by merging ‘Fiesta’and ‘Discovery’ maps [21], the genetic map for M9×R5 [22], an integrated map based on six populations [23], and our newly constructed map of Co-op 16×Co-op 17. The average Ge per LG is the average estimated genome length per linkage group calculated using the method of Fishman et al. [25] and method 4 of Chakravarti et al. [26]. Genome coverage (%) per LG was calculated by dividing the observed linkage group length by the estimated genome length of the corresponding LG multiplied by 100.