Breeding of Mid-small Fruit Type of Seedless Watermelon Variety Heitongbao

Heitongbao is a new mid-small fruit type of triploidy seedless watermelon variety with black peel and red pulp,which is bred by Yueyang Municipal Institute of Melon and Watermelon Sciences and Hunan Provincial Laboratory of Watermelon Breeding Engineering.The whole growth period of Heitongbao is around 95 d,its time from female flower opening to fruit mature needs about 32 d;the plant has mid-strong growth potential,middle size of stem and leaf and strong disease resistance and stress resistance;the fruit is round shape with fruit shape index of 1.1,the fruit peel is black with thickness of 1.1 cm,the pulp is fresh red with less fibre,and the seedless performance is great;the content of soluble solids is around 11.5% in center and 7.5% in edge,the single fruit weight is 2-4 kg,the yield is 27 000-33 000 kg/hm2 in open field and around 67 500 kg/hm2 in greenhouse.The Heitongbao has been approved by Hunan Crop Variety Approval Committee in March,2013.