Figure 1.

Carotenoid profiles of pulp from different varieties of citrus.

(A) Maximum-likelihood phylogenetic tree based on the SNP dataset (top) and heatmaps of normalized β-cryptoxanthin abundance and β-cryptoxanthin-to-violaxanthin ratios (bottom). The colored circles represent citrus categories defined in previous studies (Wang et al., 2018; Wu et al., 2018), including mandarin (MA), pummelo (PU), citron (CI), sweet orange (SW), sour orange (SO), grapefruit (GP), and lemon (LE).

(B) Heatmap of carotenoid abundance in citrus pulp. Each column indicates one component. The star indicates β-cryptoxanthin.

(C) Sparse PLS-DA of 148 accessions based on carotenoid abundance.

(D) VIP scores of β-cryptoxanthin from mandarin, pummelo, and sweet orange based on an orthogonal PLS-DA. Scale bar, 3 cm.