Identification and validation of QTL and their associated genes for pre-emergent metribuzin tolerance in hexaploid wheat (Triticum aestivum L.)

Table 2 Putative QTL for two phytotoxic traits (CCI reduction and senescence) affecting herbicide tolerance in ITMI Synthetic W7984 × Opata RIL population identified by composite interval mapping (CIM) at the LOD threshold ≥3

Trait	Chromosome arm	QTL	QTL position (cM)^c	Flanking markers	CI^d	LOD score	Additive^e	R^2f (%)
CCI^a	1 (1AS)	Qcci.uwa.1AS	12.3	Xgwm136/Xgwm33	3.9–17.3	3.4	−0.6	10
	6 (2DS)	Qcci.uwa.2DS	21.1	Xgwm210/Xgwm484	18.3–27.8	4.7	0.7	13
	10 (4AL)	Qcci.uwa.4AL.1	52.6	Xbarc170/ Xbarc343	48.6–56.7	5.8	−0.8	19
	10 (4AL)	Qcci.uwa.4AL.2	61.9	Xbarc343/ Xgwm350	59.4–63.7	4.0	−0.7	12
SNS^b	1 (1AS)	Qsns.uwa.1AS	12.3	Xgwm136/ Xgwm33	3.9–14.3	3.0	−0.5	8
	6 (2DS)	Qsns.uwa.2DS	22.1	Xgwm210.2/ Xgwm484	18.3–29.7	7.3	0.9	20
	10 (4AL)	Qsns.uwa.4AL.1	52.8	Xbarc170/ Xbarc343	49.6–58.3	6.1	−0.8	17
	10 (4AL)	Qsns.uwa.4AL.2	61.9	Xbarc170/ Xgwm350	56.7–63.7	3.4	−0.6	10

^aCCI SPAD chlorophyll content index reduction
^bSNS senescence scale (1–10)
^cQTL position from the left flanking marker (cM), within the 1-LOD support interval (CI)
^dSupport interval between the two flanking markers (cM)
^eQTL with a negative additive effect mean alleles from the tolerant parent increase tolerance, positive additive effect mean alleles from the susceptible parent increase tolerance
^fProportion of phenotypic variance explained by the QTL

ISSN: 2730-6844