Fig. 1

OPLS-DA of primary metabolites and volatiles in pear cultivars a: Score scatter plot of OPLS-DA models based on the primary metabolites with the statistical parameters (R2X = 1.000, R2Y = 0.991, Q2 = 0.574) for the classification of pear species. b: OPLS-DA loading plot. The materials in Fig. 1b correspond to the primary metabolites in Table S4. c: Score scatter plot of OPLS-DA models based on the volatiles with the statistical parameters (R2X = 0.995, R2Y = 0.993, Q2 = 0.512). d: Score scatter plot of OPLS-DA models based on the volatiles with the statistical parameters (R2X = 0.900, R2Y = 0.918, Q2 = 0.711). KEL: Korla pear; Others: All the pear cultivars except Korla pear