Fig. 3
From: Multispectral and X-ray images for characterization of Jatropha curcas L. seed quality
a Contributions of response variables to dimensions 1 and 2 with red-dashed line indicating the cut-off for significant variables according to Pearson's correlation test (P < 0.05). b Biplots of principal component analysis (PCA) for multispectral reflectance in Jatropha curcas seedlots (Lots 1, 2 and 3). The five wavelengths from 780 to 970 nm significantly explained the differences among seedlots (F = 32.22, df = 10, 586, P < 0.0001)