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

Table 1

The region information of apple samples.

Location	Province/region	Longitude (E)	Latitude (N)	Altitude (m)	Years	Mean annual temperature (°C)	Annual precipitation (mm)	Number of samples
BHB	Hebei	113°27′–119°50′	36°05′–42°40′	3–386	2017	11.3	499.6	14
					2018	11.8	549.0	15
BHB	Liaoning	118°53′–125°46′	38°43′–43°26′	10–39	2017	10.3	368.0	2
					2018	10.6	477.5	3
BHB	Shandong	114°19′–122°43′	34°22′–38°23′	33–305	2017	13.5	622.4	2
					2018	14.2	750.1	9
LP	Shaanxi	105°29′–111°15′	31°42′–39°35′	580–969	2017	19.0	591.0	23
					2018	16.9	525.6	23
LP	Gansu	92°13′–108°46′	32°31′–42°57′	1085–1421	2017	9.8	546.1	1
					2018	13.5	725.8	5
LP	Shanxi	110°14′–114°33 ′	34°34′–40°43′	365–778	2017	13.8	503.6	9
					2018	17.7	386.0	7
LP	Henan	110°21′–116°39′	31°23′–36°22′	504–626	2017	15.0	641.1	3
					2018	14.8	525.7	4
NW	Ningxia	104°17′–107°39′	35°14′–39°23′	1111–1226	2017	10.8	224.5	24
					2018	10.6	280.1	8
NW	Xinjiang	73°40′–96°23′	34°22′–49°10′	663–1104	2017	12.2	70.2	17
					2018	11.6	101.4	12

BHB, the Bohai Bay; LP, the Loess Plateau; NW, Northwest Region.