Table 3.

Description of quantitative trait loci (QTL) for root length under heat stress (RLHT), root length under heat stress as per cent of control (RLPC), shoot length under heat stress (SLHT) and shoot length under heat stress as per cent of control (SLPC), identified using composite interval mapping (CIM) and multiple interval mapping (MIM) analyses.

Trait	QTL	Linkage group	Linked marker	Position (cM)	Marker interval	LOD	Additivity	Effect (%)	CIM threshold
RLHT
	rlht5.1**	5	S5_28173385	142.61	135.3–149.0	3.86	−0.04	20.4	3.03
RLPC
	rlpc1.1	1a	S1_1860959	13.21	0–29.4	3.95	−0.04	5.2	3.12
	rlpc2.1	2	S2_861442	2.71	0–12.0	4.72	−0.05	7.5
	rlpc3.1**	3	S3_32129158	133.41	130.8–137.2	6.83	−0.08	8.6
	rlpc4.1**	4	S4_992878	4.41	0–7.5	6.21	−0.06	8.3
SLHT
	slht3.1	3	S3_32129158	133.41	131.6–136.7	5.57	−0.06	7	3.02
	slht4.1	4	S4_992878	4.41	0–8.1	4.3	−0.05	5.3
	slht6.1	6	S6_32050861	156.71	142.4–156.9	4.18	−0.04	10.2
SLPC
	slpc2.1	2	S2_861442	2.71	0–15.5	5.38	−0.12	19	3.12
	slpc4.1	4	S4_1357063	5.21	0–8.8	4.96	−0.07	8.1
	slpc3.1	3	S3_17056945	85.71	70.3–98.8	7.97	−0.05	8.6
	slpc5.1	5	S5_5758689	49.21	38.1–55.5	5.75	0.03	6.6
	slpc6.1	6	S6_32050861	156.71	135.0–156.9	7.75	−0.04	13.2
	slpc10.2	10b	S10_19121694	26.31	10.4–30.4	7.87	−0.20	17.1
	slpc10.3	10b	S10_19259739	27.31	11.7–32.2	5.69	0.13	17.9

The QTL with LOD score higher than the threshold values from CIM model, linked marker and marker intervals are presented here. The QTL positions and effects are presented from the MIM analysis. The negative additivity values represent the effect from “N22” parental allele and positive additivity values represent the effect from “IR64” parental allele, obtained as R² values representing phenotypic variance that was explained by genetic variance in the MIM model.

^**Detected in both CIM and MIM models.

Unmarked QTL were detected using MIM model only.