Abstract：‘Youbei No.1’is a new pumpkin F1 hybrid developed by crossing inbred line‘N28’as female parent and inbred line‘N17’as male parent．It is of early maturity．The whole growth period is 85-90 days．Its female flower ratio is high and fruit-setting ability is strong．The fruit has fast expanding speed and is of oblate shape．It is 6.5-7.2 cm in diameter and 11.0-11.5 cm in transverse diameter．Its peel is dark green and flesh is orange in color．The single fruit weight is about 450 g．The fruit tastes glutinous，sweet and delicious．It is resistant to powdery mildew，fruit rot and epidemic diseases．Its carbohydrate content is 57.3 g · kg-1，and crude fiber content is 11.2 g · kg-1．It can yield about 34.5 t · hm-2．It is suitable for open field cultivation in spring and summer in Hunan Province．
