Gender Discrimination of Flower Buds of Mature Populus tomentosa by HPLC Fingerprint Combined with Chemometrics

Figure 3

PCA score plot and loading scatter plot based on the peak areas of 17 common peaks of MFB and FFB of P. tomentosa. (a) Score plot of the PCA model. Boxes refer to MFB of P. tomentosa, and circles refer to FFB of P. tomentosa. The X axis refers to the scores of the first principal component (PC1). The Y axis refers to the scores of the second principal component (PC2). The variances accounted by PC1 and PC2 were 59.0% and 16.3%, respectively. (b) Loading scatter plot of the PCA model.

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