Determining the Geographical Origin of Fuji Apple from China by Multivariate Analysis Based on Soluble Sugars, Organic Acids, and Stable Isotopes

Table 3

The contribution of each factor to the content variability of soluble sugars, organic acids, and stable isotopes.

Dependent variable	Calibrate model		Year		Region		Region × year		Error
	F-Value	Significance ( value)	Contribution rates (%)	Significance ( value)	Contribution rates (%)	Significance ( value)	Contribution rates (%)	Significance ( value)	Contribution rates (%)
Sor	5.469	≤0.001	70.22	≤0.001	24.93	0.002	1.10	0.746	3.75
Glu	47.318	≤0.001	82.29	≤0.001	15.70	≤0.001	1.37	0.125	0.65
Fru	23.314	≤0.001	92.69	≤0.001	5.37	0.005	0.94	0.389	0.99
Sucr	4.527	≤0.001	43.37	0.005	35.09	0.002	16.25	0.049	5.29
Oxa	1.137	0.343	34.91	0.186	0.07	0.996	45.25	0.105	19.77
Tar	46.865	≤0.001	98.09	≤0.001	0.50	0.337	0.95	0.132	0.46
Qui	57.677	≤0.001	96.90	≤0.001	1.60	0.021	1.09	0.071	0.40
Mal	22.227	≤0.001	93.43	≤0.001	3.33	0.026	2.35	0.074	0.89
Shi	21.697	≤0.001	95.85	≤0.001	1.96	0.130	1.24	0.273	0.95
δ^2H	7.315	≤0.001	53.56	≤0.001	35.32	≤0.001	6.64	0.229	4.47
δ^18O	39.428	≤0.001	96.64	≤0.001	2.17	0.025	0.62	0.345	0.58
δ^13C	8.473	≤0.001	15.12	0.077	44.76	≤0.001	35.35	≤0.001	4.77