Graphical analysis of multi-environmental trials for wheat grain yield based on GGE-biplot analysis under diverse sowing dates

Table 5 Direct and indirect effects of grain yield components in wheat varieties evaluated in eight sowing dates

Sowing dates	Traits	Direct effect	Indirect effect via					Total correlation with GY
Sowing dates	Traits	Direct effect	X1	X2	X3	X4	X5	Total correlation with GY
6^th September	BY (X1)	0.20	-	0.12	0.02	0.12	0.17	0.63
	HI (X2)	0.76	0.27	-	-0.002	-0.76	0.69	0.96
	TGW (X3)	0.10	0.009	-0.0003	-	-0.0004	-0.0044	0.10
	NGSP (X4)	-0.64	0.403	0.64	0.003	-	0.56	0.96
	NSP (X5)	0.05	0.98	-0.97	-0.05	0.97	-	0.98
	Residual	0.03
6^th October	BY (X1)	0.38	-	-0.07	0.16	-0.05	0.29	0.71
	HI (X2)	0.28	-0.16	-	0.11	0.20	0.13	0.56
	TGW (X3)	0.10	0.04	-0.04	-	-0.04	0.03	0.09
	NGSP (X4)	0.17	-0.02	0.22	-0.06	-	0.28	0.59
	NSP (X5)	0.47	0.36	-0.22	-0.02	0.24	-	0.83
	Residual	0.04
6^th November	BY (X1)	0.42	-	-0.09	-0.09	0.29		0.53
	HI (X2)	0.27	-0.06	-	0.27	0.14		0.62
	NGSP (X3)	0.33	-0.07	0.33	-	0.18		0.77
	NSP (X4)	0.36	0.25	0.18	0.18	-		0.97
	Residual	0.03
6^th December	NGSP (X1)	0.49	-	0.34				0.83
	NSP (X2)	0.51	0.44	-				0.95
	Residual	0.11
6^th January	BY (X1)	0.30	-	0.11	-0.08	-0.03		0.30
	HI (X2)	0.34	0.03	-	0.09	0.30		0.76
	TGW (X3)	0.02	-0.013	0.003	-	0.007		0.02
	NSP (X4)	0.13	-0.02	0.28	0.34	-		0.73
	Residual	0.02
6^th February	BY (X1)	0.26	-	0.17				0.43
	NGSP (X2)	0.79	0.17	-				0.96
	Residual	0.08
6^th March	TGW (X1)	0.25	-	0.20	0.22			0.67
	NGSP (X2)	0.43	0.22	-	0.33			0.98
	NSP (X3)	0.37	0.27	0.30	-			0.94
	Residual	0.10
6^th April	BY (X1)	0.49	-	0.46				0.95
	NGSP (X2)	0.51	0.46	-				0.97
	Residual	0.19

BY Biological yield, GY Grain yield, HI Harvest index, NGSP Number of grains per spike, NSP Number of spikes per m², TGW Thousand grain weight

ISSN: 1471-2229