Table 1.

Variance analysis of grain Cd accumulation in different rice ecotypes by two-way ANOVA.

Ecotype	No. of cultivars	Components	Sum of square	Mean of square	F-value	σ2	Var%
ind	20	SCd	3.91	1.95	13.20**	0.05	2.6
		G	123.53	6.50	43.93**	1.06	61.0
		G × SCd	42.40	1.12	7.54**	0.48	27.9
aus	8	SCd	2.68	1.34	4.40*	0.07	2.5
		G	41.12	5.87	19.31**	0.93	35.4
		G × SCd	26.45	1.89	6.21**	1.33	50.6
tej	16	SCd	15.58	7.79	44.32**	0.24	40.0
		G	16.41	1.09	6.23**	0.18	30.6
		G × SCd	8.57	0.29	1.63	–	–
trj	12	SCd	0.90	0.45	12.99**	0.02	5.8
		G	13.48	1.23	35.39**	0.20	66.8
		G × SCd	3.83	0.17	5.03**	0.05	15.7
aro	3	SCd	3.13	1.57	13.33**	0.24	6.2
		G	38.85	19.43	165.47**	3.22	82.1
		G × SCd	4.60	1.15	9.79**	0.34	8.8
mix	9	SCd	1.08	0.54	1.77	–	–
		G	38.09	4.76	15.68**	0.74	71.0
		G × SCd	6.21	0.39	1.28	–	–

“G” represents the genotypic variations and “SCd” represents the soil Cd concentrations in three different paddy fields. “Var%” represents the expansion of different parts on determining the phenotypic variations. ^* and ^** indicate significant differences at P < 0.05 and P < 0.01, respectively.