Fig. 1

Overview of the three phenotypic traits assessed in this study. a Fruits of 30 representative pear cultivars were cross-sectioned at 49 days after full bloom (DAFB) and stained with phloroglucinol-HCl to show the red-stained stone cells. b Distribution and appearance of stone cells in fruit flesh analyzed at 49 DAFB by light microscopy. c Distribution of stone cell contents, and lignin and cellulose levels in stone cell. The x-axis indicates the contents (g/100 g fruit flesh fresh weight), and the y-axis shows the probability density estimated by kernel density estimation (KDE). d Pairwise correlation between the contents (g/100 g fruit flesh fresh weight) of stone cells, lignin, and cellulose in 206 pear cultivars