Mapping quantitative trait loci for fruit traits and powdery mildew resistance in melon (Cucumis melo)

Botanical Studies

Table 3 Parameters of QTLs for fruit traits and powdery mildew disease index in the F₂ population

QTL	Trait	Trial^a	LG	Peak^b	Flanking markers	LOD	a^c	d	d/a	PVE %^d	Supports previous QTLs
qFW5	FW	March	5	45.0	CMAGN52–CMGAN3	4.02	−104.01	−21.72	0.21	9.63	Yes
qFW11	FW	April	11	13.0	CMTC160a+b–CMBR132	7.04	180.65	−24.99	−0.14	13.70	Yes
qFD5	FD	March	5	36.3	CMAGN52–CMGAN3	3.53	−0.51	−0.02	0.05	8.50
qFD11	FD	April	11	14.0	CMTC160a+b–CMGAN12	6.35	0.91	−0.08	−0.09	12.44	Yes
qFL2	FL	March	2	8.0	CSJCT64–GCM548	5.20	0.96	0.05	0.05	14.08	Yes
qFL7	FL	March	7	15.1	CM26–CMBR21	3.63	0.68	0.20	0.29	10.49	Yes
qFL7	FL	April	7	7.7	CM26–CMBR21	4.21	0.82	−0.24	−0.29	10.67	Yes
qFL8	FL	March	8	47.3	CMBR22–CSWCT30	3.83	0.53	0.74	1.40	9.94	Yes
qFT5	FT	April	5	14.0	GCM262–ECM92	4.19	−0.20	0.15	−0.74	9.89	Yes
qFT11	FT	April	11	52.0	CMTC160a+b–CMBR132	4.86	0.22	−0.16	−0.71	11.32
qFT12	FT	March	12	0.0	CMTCN14–CMBR40	3.17	−0.20	0.03	−0.17	8.92	Yes
qFT12	FT	April	12	8.4	CMTCN14–CMBR40	4.19	−0.20	0.15	−0.83	9.89	Yes
qND2	ND	April	2	11.0	CSJCT641–GCM548	8.79	−0.71	0.59	−0.84	17.17	Yes
qND4	ND	April	4	19.0	GCM246–GCM336	8.88	0.80	−0.14	−0.18	15.01
qND6	ND	March	6	12.0	ECM135–CSN166	3.38	−0.66	0.42	−0.64	8.14
qND7	ND	April	7	3.0	CM26–CMTCN30	6.84	−0.61	0.63	−1.03	15.37
qNW2	NW	March	2	0.0	CSJCT641–GCM331	3.76	−0.20	−0.34	1.70	11.16
qNW2	NW	April	2	9.0	CSJCT641–GCM331	8.96	−0.44	0.24	−0.55	14.69
qNW4	NW	April	4	19.0	GCM246–CMAGN73	11.05	0.48	−0.08	−0.17	19.55
qNW6	NW	March	6	8.0	ECM135–ECM52	4.56	−0.34	−0.02	0.06	12.36
qNW7	NW	March	7	14.1	CM26–CMBR21	5.73	−0.36	−0.06	0.17	14.27
qNW7	NW	April	7	10.0	CM26–CMBR21	6.08	−0.30	0.27	−0.90	12.09
qPM2	PM	April	2	2.7	CSJCT358–CMBR120	67.88	1.82	−1.28	−0.70	75.85	Yes

FW fruit weight; FD fruit diameter; FL fruit length; FT flesh thickness; ND netting density; NW netting width; PM disease index for powdery mildew (Podosphaera xanthii race 1)
^a Trials 1 and 2 were completed in March and April, 2009, respectively
^b Peak position of the significant QTL
^c Direction of additive effects from ‘Bai-li-gua’. d/[a] indicates degree of dominance
^d Phenotypic variance explained by an individual QTL