Natural variation at qHd1 affects heading date acceleration at high temperatures with pleiotropism for yield traits in rice

Table 3 Effects of qHd1 on yield traits in Trail-I, III and IV of the multiple sowing-date experiment

Trial	Trait	CJ1-Phenotypic mean^a		P	A ^b	R² (%)^c	CJ2-Phenotypic mean		P	A	R² (%)
(Sowing date)	Trait	NIL^ZS97	NIL^MY46	P	A ^b	R² (%)^c	NIL^ZS97	NIL^MY46	P	A	R² (%)
I (28 Apr)	NP	6.61	6.43	0.1769			6.82	6.46	0.0087	−0.18	3.6
	NGP	109.4	109.4	0.9649			105.2	106.7	0.3825
	TGW	25.50	25.71	< 0.0001	0.11	9.5	25.40	25.49	0.1194
	SF	88.17	89.02	0.1391			88.13	88.15	0.9611
	GY	17.36	16.70	0.0599			17.56	16.53	0.0086	−0.51	3.6
III (20 May)	NP	7.16	7.15	0.9210			6.65	6.71	0.6642
	NGP	110.1	105.6	0.0001	−2.28	7.3	115.0	108.9	< 0.0001	−3.07	9.9
	TGW	24.74	24.56	0.0002	−0.09	8.1	25.02	24.80	0.0004	−0.11	8.4
	SF	83.23	83.46	0.5555			83.94	84.88	0.0418	0.47	2.0
	GY	18.55	17.72	0.0500			18.32	17.57	0.0701
IV (15 Jun)	NP	8.46	8.59	0.5240			7.82	7.83	0.9624
	NGP	101.4	98.9	0.1892			106.5	105.6	0.5625
	TGW	27.04	25.06	< 0.0001	−0.99	68.3	26.73	24.36	< 0.0001	−1.19	79.6
	SF	82.11	84.20	0.0005	1.05	7.3	83.34	85.32	0.0014	0.99	5.9
	GY	20.74	18.96	0.0006	−0.89	6.6	20.57	18.37	< 0.0001	−1.10	9.8

NP number of panicle per plant, NGP number of grains per panicle, TGW 1000-grain weight (g), SF spikelet fertility rate (%), GY grain yield per plant (g)
^aNIL^ZS97 and NIL^MY46 are near isogenic lines having homozygous qHd1 alleles from Zhenshan 97 and Milyang 46, respectively
^badditive effect of replacing a Zhenshan 97 allele with a Milyang 46 allele
^cproportion of phenotypic variance explained by the QTL effect

ISSN: 1471-2229