‘Jinkailong’is a watermelon F₁ hybrid bred by crossing inbred lines‘ ZGL-25-1’as female
parent and‘ FW23-Ⅲ-4’as male parent．It is of mid-late maturity．Its whole growing period is 105 days，and
the fruit development period is 35 days．Its fruit is of oval shape．The fruit pericarp is light green in color with
dark green zigzag stripes．Its peel is 1.2 cm in thickness．It is tolerant to storage and transportation．Its flesh
is red in color，and the fruit is crispy with sweet flavor and good quality．The central sugar content is 11.9%，
and sugar gradient in brim area is small．The single fruit weight is 4.5-7.5 kg．Its yields in dry land and irrigated
land are about 51.0，67.5 t·hm^-2 respectively．In fields its resistance to Fusarium wilt is stronger than that of the
contrast‘ Xinong No.8’．It is suitable for cultivation in Gansu Province and areas with same ecological conditions
in open fields．