QTL mapping reveals a tight linkage between QTLs for grain weight and panicle spikelet number in rice

Rice

Table 2 QTLs detected in the BC ₄ F _3, BC ₅ F _2, BC ₅ F _3, and BC ₅ F ₄ generations

Trait^$	QTL	Marker	Pop.	P	R²	Phenotypic mean ± s.d.^%
Trait^$	QTL	Marker	Pop.	P	R²	HH	HW	WW
TGW	qTGW5	RM194	BC₄F₃	0.0001	45.9	26 ± 1.3(108)^#	24 ± 1.7(210)	23 ± 1.2(113)
		RM194	BC₅F₂	0.0001	37.1	26 ± 0.8(28)	24 ± 1.1(55)	23 ± 0.8(44)
		RM194	BC₅F₃	0.0001	64.8	25 ± 0.4(5)	24 ± 0.6(11)	23 ± 0.4(10)
		RM194	BC₅F₄	0.0001	79.0	25 ± 0.7(6)	24 ± 0.9(6)	23 ± 0.6(6)
SPP	qSPP5	RM194	BC₄F₃	0.01	9.7	123 ± 22	145 ± 25	144 ± 21
		RM194	BC₅F₂	0.01	13.0	126 ± 17	140 ± 17	140 ± 16
		RM194	BC₅F₃	0.01	19.5	133 ± 11	148 ± 12	146 ± 12
		RM18058	BC₅F₄	0.005	33.0	125 ± 10	148 ± 12	150 ± 12
SB	qSB5	RM194	BC₄F₃	0.01	9.0	24 ± 0.8	25 ± 1.2	26 ± 1.1
		RM194	BC₅F₂	0.005	9.0	23 ± 0.8	26 ± 1.0	26 ± 0.9
		RM194	BC₅F₃	0.005	20.9	23 ± 0.7	24 ± 1.0	25 ± 0.8
		RM194	BC₅F₄	0.0001	35.7	23 ± 0.8	26 ± 1.0	27 ± 0.9
CL	qCL5	RM194	BC₄F₃	0.01	9.4	77 ± 3.1	78 ± 3.2	79 ± 2.8
		RM194	BC₅F₂	0.005	20.0	75 ± 2.6	78 ± 3.0	78 ± 2.9
		RM194	BC₅F₄	0.005	21.5	79 ± 1.9	83 ± 2.0	83 ± 1.9
GW	qGW5	RM194	BC₅F₄	0.0001	62.0	1.58 ± 0.10	1.49 ± 0.10	1.45 ± 0.11

^$TGW: 1,000-grain weight; SPP: number of spikelets; SB: number of secondary branches; CL: culm length; and GW: grain width. ^%HH: Hwayeongbyeo homozygotes; HW: heterozygotes; and WW: O. rufipogon homozygotes. ^#Numbers in parenthesis indicate the number of plants or lines.