Fig. 1: Morphological characterization and statistical analysis of two parental lines, TopMark and M406.

a–c Morphological characterization of two melon lines at different stages (1, 3, and 6 weeks after transplanting). d, e Plant height and stem internode numbers of two melon lines at different stages (1–10 weeks) after transplanting. The internode length (f), lateral branch length (g), and stem diameter (h) for the first ten internodes of two parental lines at 45 days after transplanting. i, j Cytological characterization of the melon normal line TopMark (i) and semidwarf line M406 (j). k Quantification of the cell size of the eighth internodes in three different TopMark and M406 plants. The cell size in the M406 plants was significantly smaller than that in TopMark plants. The data are presented as the mean ± SD. Scale bars: 10 cm (a, b), 100 μm (i, j)