Crop to wild introgression in lettuce: following the fate of crop genome segments in backcross populations

Uwimana, Brigitte; Smulders, Marinus JM; Hooftman, Danny AP; Hartman, Yorike; van Tienderen, Peter H; Jansen, Johannes; McHale, Leah K; Michelmore, Richard W; Visser, Richard GF; van de Wiel, Clemens CM

doi:10.1186/1471-2229-12-43

BMC Plant Biology

Table 3 Significant QTL × QTL interactions in the BC₁ and BC₂ populations, their explained phenotypic variance and the predicted means per genotype combination

From: Crop to wild introgression in lettuce: following the fate of crop genome segments in backcross populations

				% expl. variance Predicted mean per genotype combination¹
Population	Treat.	Trait	QTLxQTL	h/h	h/b	b/h	b/b
BC₁	Control-D	Plant height	L-1-1 × DW-4-6 5	30.71	30.30	30.54	31.86
		Dry weight	L-1-1 × RMC-8-4 4	2.947	3.10	2.832	2.578
		Relative moisture content	L-7-1 × L-5-2 4	93.98	93.74	93.84	93.98
			L-7-1 × RMC-5-1 5	94.09	93.62	93.96	93.89
			L-1-1 × L-5-2 4	93.77	93.95	94.00	93.8
	Control-SN	Plant height	L-9-1 × RMC-5-1 4	26.14	27.20	29.29	33.79
			L-3-3 × RMC-8-4 5	29.76	28.49	27.46	29.94
		Relative moisture content	L-1-1 × L-5-2 7	92.18	92.40	92.30	92.11
	Salt	Plant height	L-5-2 × RMC-8-4 4	17.85	16.61	17.01	17.68
		Fresh weight	DW-9-6 × RMC-5-1 5	11.44	10.78	10.38	11.06
		Relative moisture content	L-1-1 × L-5-2 7	90.07	90.34	90.25	90.02
			L-3-3 × DW-8-3 7	90.05	90.39	90.17	90.05
			L-3-3 × RMC-8-4 9	90.09	90.41	90.20	90.04
	Nutrient deficiency	Plant height	L-3-3 × RMC-8-4 4	10.56	10.19	9.62	10.16
			DW-8-4 × RMC-5-1 5	9.85	10.41	9.18	10.79
		Dry weight	L-9-1 × DW-8-3 4	0.67	0.59	0.58	0.58
		Relative moisture content	DW-8-3 × DW-9-6 5	80.17	80.87	81.53	80.86
BC₂	Control-D	Plant height	L-7-1 × L-8-2 5	28.87	29.04	31.06	28.69
		Fresh weight	FW-1-2 × DW-9-6 5	37.80	40.99	41.41	37.33
			L-3-3 × RMC-6-3 8	29.61	40.00	39.01	38.89
			L-7-1 × L-3-3 8	33.83	39.58	41.74	38.49
		Relative moisture content	L-9-1 × DW-4-6 11	93.43	92.82	92.82	92.77
			L-4-4 × L-8-2 4	92.77	93.04	92.85	92.78
	Drought	Plant height	L-7-1 × L-8-2 5	14.42	14.29	15.11	14.02
	Control-SN	Plant height	L-7-1 × L-8-2 5	21.20	20.69	23.71	21.16
		Fresh weight	L-4-4 × DW-9-6 8	19.65	17.22	16.97	17.76
			L-3-3 × RMC-6-3 7	14.89	18.04	17.94	17.70
		Dry weight	L-4-4 × DW-9-6 8	1.46	1.26	1.28	1.32
			L-3-3 × RMC-6-3 3	1.12	1.33	1.34	1.31
		Relative moisture content	L-9-1 × DW-4-6 7	93.09	92.56	92.64	92.54
	Salt	Plant height	L-9-1 × RMC-5-3 5	16.91	16.04	16.11	16.98
		Fresh weight	DW-4-6 × L-5-2 4	11.50	10.34	9.88	10.44
		Dry weight	L-8-2 × FW-1-2 5	0.93	0.95	0.98	0.87
	Nutrient deficiency	Plant height	L-7-1 × FW-1-2 6	10.95	11.37	11.68	11.26
		Fresh weight	L-7-1 × FW-1-2 6	5.42	5.70	5.47	5.06
			RMC-1-3 × RMC-5-3 5	5.73	5.20	5.19	5.41
		Relative moisture content	L-9-1 × DW-4-6 6	87.87	86.45	86.84	86.56
			DW-4-6 × RMC-1-3 6	86.01	87.65	86.24	86.63
			L-7-1 × RMC-1-3 6	85.54	86.78	86.79	86.97
			FW-1-2 × DW-9-6 8	86.76	86.53	86.13	86.92

1 h: heterozygous genotype, b: homozygous for the wild allele

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ISSN: 1471-2229

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