Korean Journal of Breeding Science

Morphological traits of watermelon used in this study.

	Characteristics	Degree/ Note
Leaf	Degree of lobing	3, week; 5, medium; 7, strong
Leaf	Marbling	1, absent or weak; 2, medium; 3, strong
Ovary	Pubescence	3, week; 5, medium; 7, strong
Flower	Time of female flowering	3, early; 5, medium; 7, late
Flower	(50% of plants with at least one female flower)	3, early; 5, medium; 7, late
Fruit	Shape in longitudinal section	1, circular; 2, broad elliptic; 3, elliptic; 4, elongated elliptic
	Ground color of skin	1, white; 2, yellow; 3, green
	Intensity of ground color of skin	1, very light; 2, very light to light; 3, Light; 4, light to medium; 5, Medium; 6, medium to dark; 7, dark; 8, dark to very dark; 9, very dark
	Degree of grooving	1, absent or weak; 2, at basal half; 3, at apical half; 4, on whole fruit
	Stripes	0, absent or weak; 1, present
	Main color of flesh	1, white; 2, yellow; 3, orange; 4, pink; 5, pinkish red; 6, red;
	Shape of apical part	1, flat; 2, flat to rounded; 3, rounded; 4, rounded to conical; 5, conical
Seed	Ground color of testa	1, white; 2, cream; 3, green; 4, red; 5, red-brown; 6, brown; 7, black