A dense SNP genetic map constructed using restriction site-associated DNA sequencing enables detection of QTLs controlling apple fruit quality

Table 6 QTLs for fruit quality traits detected by interval mapping

Trait	Year	QTL	Map/Linkage group	LOD	Exp (%)	Peak location (cM)	Intervals on maps (cM)	QTL-associated markers
Malic acid	2011	qtlma.j8	J8	7.7	39.1	57.27	55.27 ~ 59.15	emC08.14121899
								emC08.13666872
Citric acid	2011	qtlc.g8	G8	3.7	19.4	46.58	46.13 ~ 47.98	huM001766.113.1072
	2011	qtlc.j8	J8	5.5	27.2	59.15	55.27 ~ 62.15	emC08.14121899
	2011	qtlc.j15	J15	3.6	20.2	64.01	63.42 ~ 64.97	huC15.29186826
Acetic acid	2011	qtla.j7	J7	3.7	20.1	59.83	59.13 ~ 60.83	euLG07_014
Total acid	2011	qtlta.j8	J8	7.7	39.2	57.27	55.27 ~ 59.15	emC08.14121899
								emC08.13666872
Fructose	2011	qtlf.j1	J1	4.3	28.5	37.82	32.81 ~ 42.74	huC01.18233570
								emC01.11115376
Sucrose	2011	qtls.g1	G1	3.5	17.5	49.57	48.60 ~ 50.57	huC01.18378291
Fruit weight	2008	qtlfw.j3	J3	3.7	11.2	24.65	24.28 ~ 25.39	hmC03.5431144
Fruit weight	2008	qtlfw.j5	J5	3.8	11	53.86	52.86 ~ 54.86	euC05.25996313
Fruit firmness	2010	qtlff.j11a	J11	4.4	27.5	24.60	22.21 ~ 26.43	euC11.7408490
Fruit firmness								huC11.10309880
	2010	qtlff.j11b	J11	3.9	21.6	11.48	10.48 ~ 13.30	euC11.5719084
								hmC11.4173064

The phenotyping data were collected from the mapping population derived from ‘Jonathan’ × ‘Golden Delicious’ in 2008 to 2011. QTL intervals were the ranges that above the LOD threshold of 3.5 at a 95 % confidence level. Markers located at or flanked with the peak LOD value of a QTL were recognized as QTL-associated markers. J Jonathan, G Golden Delicious