Branch and spikelet characteristics	Effective panicles (×10⁴/ha)	Number of spikelets per panicle	Setting percentage (%)	Thousand grain weight (g)	Grain yield (t/ha)
Surviving branches	−0.034	0.795**	−0.076	−0.592**	0.145
Retrograde branches	−0.037	0.710**	−0.075	−0.586**	0.010
Differentiated branches	−0.037	0.816**	−0.080	−0.628**	0.105
Branches retrograded percentage	0.01	0.277	−0.036	0.272	−0.326
Surviving spikelets	−0.268	0.876**	−0.208	−0.393	0.460*
Retrograde spikelets	−0.527**	0.614**	−0.330	0.022	0.339
Differentiated spikelets	−0.376	0.868**	−0.266	−0.292	0.461*
Spikelets retrograded percentage	−0.511*	−0.152	−0.296	0.168	0.262
Surviving primary branches	−0.409*	0.778**	−0.075	−0.24	0.261
Retrograde primary branches	0.217	−0.186	−0.163	−0.109	−0.184
Differentiated primary branches	−0.399	0.782**	−0.088	−0.258	0.249
Primary branches retrograded percentage	0.240	−0.213	−0.161	−0.108	−0.207
Surviving secondary branches	0.001	0.779**	−0.074	−0.610**	0.132
Retrograde secondary branches	−0.040	0.713**	−0.073	−0.585**	0.013
Differentiated secondary branches	−0.015	0.807**	−0.079	−0.642**	0.096
Secondary branches retrograded percentage	−0.035	0.152	−0.019	−0.191	−0.17
Surviving primary spikelets	−0.630**	0.424*	−0.585**	0.343	0.439*
Retrograde primary spikelets	−0.221	0.904**	−0.06	−0.504*	0.389
Differentiated primary spikelets	−0.570**	0.815**	−0.446*	−0.047	0.530**
Primary spikelets retrograded percentage	−0.126	0.871**	0.003	−0.577**	0.317
Surviving secondary spikelets	−0.207	0.864**	−0.149	−0.449*	0.429*
Retrograde secondary spikelets	−0.537**	0.476*	−0.355	0.141	0.288
Differentiated secondary spikelets	−0.339	0.848**	−0.235	−0.316	0.438*
Secondary spikelets retrograded percentage	−0.474**	−0.069	−0.277	0.490*	0.010