Table 6. Previously reported root-related QTLs within the regions of chromosomes 1 and 8 where the highest number of traits aligned in this study.

	Category	Trait	Gramene QTL ID	List hits	List total	Population hits	P value	Reference
Chr 1	Vigor	root number	DQC3	11	11	28	5.19E-25	[33]
	Vigor	root number	AQC003	11	11	28	5.19E-25	[33]
	Vigor	root number	AQO077	11	11	28	5.19E-25	[34]
	Vigor	root dry weight	AQGI070	11	11	42	1.03E-22	[35]
	Abiotic stress	root dry weight to tiller number ratio	CQQ13	9	11	56	1.21E-15	[36]
	Abiotic stress	root weight	CQQ6	9	11	56	1.21E-15	[36]
	Abiotic stress	root weight	CQQ32	9	11	56	1.21E-15	[37]
	Abiotic stress	penetrated root thickness	DQF9	9	11	56	1.21E-15	[38]
	Abiotic stress	relative root length	CQL2	2	11	2	8.12E-06	[39]
	Abiotic stress	relative root length	CQL1	2	11	2	8.12E-06	[39]
	Anatomy	seminal root length	CQS3	2	11	2	8.12E-06	[40]
	Abiotic stress	penetrated root length	AQGC035	3	11	60	0.00061969	[41]
	Abiotic stress	penetrated root thickness	AQGC022	3	11	60	0.00061969	[41]
Chr 8	Vigor	root to shoot ratio	AQO017	13	17	22	3.29E-28	[34, 42]
	Vigor	root to shoot ratio	AQO025	13	17	22	3.29E-28	[34, 42]
	Vigor	root number	CQAW26	17	17	97	3.35E-28	[43]
	Abiotic stress	relative root length	CQL9	14	17	42	3.76E-26	[39]
	Abiotic stress	relative root length	CQL8	14	17	42	3.76E-26	[39]
	Anatomy	root length	AQZ004	4	17	13	2.17E-07	[44]
	Abiotic stress	relative root length	AQZ008	4	17	13	2.17E-07	[44]
	Anatomy	root thickness	AQAL029	4	17	120	0.00184121	[45]

Gramene QTL ID: the Gramene database accession code; List hits: the number of 100kb blocks in the current introgression bin that intersect the Gramene QTL; List total: the total number of 100kb blocks in current QTL bin; Population hits: the total number of genome-wide 100kb introgression blocks for the current Gramene QTL category (out of a total of 3680 100kb introgression blocks for all Gramene QTLs; P value: probability based on a one-tailed Fisher's Exact Test; Reference: the publication in which the QTL was reported.