Fig. 3: Comparison of seed numbers between the “M20 × M20” and “2018-Z-4 × M20” cross-combinations.

A Longitudinal sections of fruit from watermelon sources. Bars = 2 cm. B The seed number per fruit of two watermelon lines. Bars=2 cm. N = 7 represents seven fruits for each line. Values are the means + SD. The statistical data were analyzed with a one-tailed Student’s t test to evaluate significance. Double asterisks indicate significant differences with respect to the watermelon parent lines (t test at p < 0.01). DAP stands for days after pollination