Pyramiding of drought yield QTLs into a high quality Malaysian rice cultivar MRQ74 improves yield under reproductive stage drought

Rice

Table 1 Means for days to flowering (DTF), plant height (PHT), and grain yield (GY) of MRQ74 PLs as compared to MRQ74 under lowland reproductive stage drought stress and non-stress conditions

Season/Year	Stress	Duration	No. of MRQ 74 PLs	DTF			PHT (cm)			GY (kg ha⁻¹)
				Mean		H	Mean		H	Mean		H
				MRQ74 PLs	MRQ 74		MRQ74 PLs	MRQ 74		MRQ74 PLs	MRQ 74
DS2013	Non-stress	Medium	130	86 ± 3.8	94	0.88	83 ± 4.28	85	0.87	3768 ± 835.4	4302	0.75
DS2013	Drought	Medium	130	91 ± 3.79	98	0.89	58 ± 4.9	55	0.66	774 ± 267.5	55	0.84
DS2013	Non-stress	Late	102	93 ± 4.7	89	0.71	85 ± 3.9	82	0.74	4585 ± 1003.2	4044	0.56
DS2013	Drought	Late	102	97 ± 4.2	93	0.72	68 ± 4.2	65	0.57	836 ± 820.8	579	0.48
DS2014	Non-stress	Late	235	92 ± 3.7	96	0.88	82 ± 4.0	78	0.84	5680 ± 932.3	5104	0.81
DS2014	Drought	Late	235	99 ± 5.5	105	0.79	54 ± 4.5	55	0.63	374 ± 373	169	0.77

DS dry season, DTF days to 50 % flowering, PHT, in cm and plant height, M means ± SE, H broad-sense heritability, GY grain yield, in kg ha⁻¹