Table 7.

Summary of chromosomal regions with co-localized QTLs for seedling root traits identified in this study and QTLs for six other traits reported previously in the same RIL population

QTLs identified in this study		QTLs reported in previous studies
QTL	Bin	Traita	Marker interval	Bin	Reference
4dPSC1–1, 4dPSC1–2, 4dRTN1–1, 4dTRL1–1, 4dRSA1–1, 4dTRV1–1, 9dTRV1–1	1.02	As content in stem	phi001–bnlg1083	1.02–1.03	[40]
		Internode number	phi427913–phi001	1.02	[38]
		MARL in HN	phi427913–bnlg1614	1.01–1.02	[42]
4dTRV1–2, 9dPRL1–1, 14d ARD1–1	1.03	Grain yield, Row number	bnlg2180–umc1169	1.03–1.04	[34]
		Internode number	phi001–bnlg1484	1.03	[38]
		ARL in LN/HN	bnlg1866–bnlg2180	1.03	[42]
9d RTN1–1	1.07	Plant height	umc2151–bnlg1556	1.07	[38]
		Leaf number	umc1335–umc1122	1.07	[38]
		Internode number	umc2151–umc1122	1.07	[38]
		MARL in LN, AARL in LN	bnlg1025–umc2029	1.07–1.09	[42]
		RSFW, RSDW	bnlg1556–umc2029	1.07–1.08	[36]
14d RSA2–1	2.06–2.07	As content in stem	bnlg1633–umc1042	2.07	[40]
		Plant height	umc2372–umc1497	2.07	[38]
		AARL in LN	bnlg1633–umc1042	2.07	[42]
		RSFW, RSDW, LTD	umc1042–bnlg2144	2.07–2.08	[36]
14dLRN3–1, 14dRTN3–1	3.04	Leaf number	umc1223–umc1773	3.04	[38]
		Leaf number	umc2002–bnlg1035	3.04	[38]
		Average internode length	umc1773–bnlg1035	3.04	[38]
		ARN in LN/HN	umc1504–umc1523	3.04	[42]
4dLRN4–1	4.03	Grain yield	umc2082–umc2176	4.03	[34]
4d ARD5–1	5.03	Plant height, Average internode length	umc1692–umc2373	5.03	[38]
		Resistance to common smut	phi109188–umc2373	5.03	[35]
14dPRL5–1, 14dTRL5–1, 14dRSA5–1	5.05	Ear length Plant height	umc1019–bnlg1237 umc1155–bnlg1237	5.05–5.06 5.05	[34] [38]
		Average internode length	umc1155–umc1019	5.05	[38]
		LRL in LN/HN	bnlg278–phi048	5.05–5.07	[42]
14d TRV5–1	5.09	AARL in LN/HN	umc1792–umc1829	5.08–5.09	[42]
4d PRL6–1	6.07	Internode number	umc1020–phi299852	6.07	[38]
		AARL in LN/HN	umc1063–phi299852	6.07	[42]
9d LRN7–1	7.02–7.03	Ear length	bnlg1792–umc2142	7.02	[34]
		Grain yield	bnlg339–umc1865	7.03	[34]
		As content in leaves	umc2142–mmc0411	7.02–7.03	[40]
		Internode number	blg1792–mmc0411	7.02	[38]
14d ARD8–1	8.04–8.05	Row number	umc1460–umc1562	8.04–8.05	[34]
9dRSA8–1, 9dTRV8–1, 14dTRV8–1	8.05	Ear length	umc1562–bnlg666	8.05	[34]
9d TRL9–1	9.04	Row number	bnlg127–bnlg1209	9.03–9.04	[34]
		Leaf number	bnlg1208–umc1771	9.04	[38]
		Average internode length	bnlg1209–umc1771	9.04	[38]
		LTD	bnlg1209–umc2119	9.04	[36]
9d PSC10–1	10.05	Kernel weight	umc1911–umc2043	10.04–10.05	[34]
14d PSC10–1	10.06	Row number	umc1993–phi323152	10.05–10.06	[34]
		ARN in HN	umc2043–umc1061	10.05–10.06	[42]
		LTD	umc2122–phi323152	10.05–10.06	[36]

^aFor the abbreviations of the traits reported previously, five seedling root traits generated under low nitrogen (LN) or high nitrogen (HN) conditions (MARL, ARL, AARL, ARN, and LRL) [42] and three traits associated with water stress responses (LTD, RSFW, and RSDW) [36] are included. MARL, ARL, AARL, ARN, and LRL represent maximal axial root length, axial root length, average axial root length, axial root number, and lateral root length, respectively. LTD, RSFW, and RSDW represent leaf temperature differences, shoot fresh weight, and shoot dry weight, respectively