Table 1.

Results of partial least-square (PLS) models from multi-spectral imaging data to predict free, bound, and total phenolic content of black (variable purple and purple), red, and white rice diverse lines (n = 385)

Predicted Variables	Training (n = 270)		Testing (n = 115)
	R2	RMSE	R2	RMSE
Free Phenolic Content	0.66	0.18	0.73	0.22
Free Flavonoid Content	0.62	0.25	0.51	0.40
Free Anthocyanin Content	0.36	0.58	0.28	0.89
Bound Phenolic Content	0.61	0.55	0.63	0.42
Bound Flavonoid Content	0.73	0.41	0.75	0.51
Bound Anthocyanin Content	0.82	0.32	0.83	0.28
Total Phenolic Content	0.71	0.60	0.79	0.63
Total Flavonoid Content	0.79	0.52	0.80	0.61
Total Anthocyanin Content	0.80	0.51	0.84	0.69