Table 1 ANOVA result of five Vis/NIR spectral groups displaying phenotypic variation for grain traits, % chalk, % amylose, ASV, bran color, width, length, and thickness among white grain samples from the AR09 environment. R² values are presented between PC1 components per wavelength group and grain quality trait.

	Group 1		Group 2		Group 3		Group 4		Group 5
	R²	Prob > F	R²	Prob > F	R²	Prob > F	R²	Prob > F	R²	Prob > F
% Chalk	0.81	**	0.74	**	0.83	**	0.89	**	0.82	**
Amylose %	0.31	**	0.31	**	0.36	**	0.31	**	0.31	**
ASV	0.02	ns	0.02	ns	0.02	ns	0.01	ns	0.01	ns
Kernel Bran Color	0.29	**	0.36	**	0.26	**	0.16	**	0.28	**
Kernel Width mm	0.21	**	0.20	**	0.23	**	0.19	**	0.20	**
Kernel Length mm	0.01	ns	0.00	ns	0.01	ns	0.02	ns	0.01	ns
Kernel Thickness (mm)	0.11	**	0.10	ns	0.14	**	0.11	**	0.10	ns

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