Abstract: The experiment studied 31 pumpkin inbred line (parent) and 127 hybrid combinations(F₁)on combining ability and heterosis. The result indicated that the highest general combining ability of the single fruit weight and longitudinal diameter and transverse diameter and fruit pulp thickness and soluble solid content of 31 inbred lines were 396, 456, 467-1,467-1 and Xuanfu,respectively. The highest special combining ability of the single fruit weight and fruit vertical diameter and the meat thick of 127 hybrid combinations was Beiguan x Long2 and the highest special combining ability of the transverse diameter and the soluble solid content of 127 hybrid combinations were 042一x 467-1 and 009-1 x 467-1.In addition, pumpkin hybrid combinations(F₁)have more obvious heterosis performance. The number of variety of the positive mid}arent and over arent heterosis of the single fruit weight were 41 and 27,accounting for 49% and 32% of 85 hybrid combinations. The number of variety of the positive midparent and over arent heterosis of longitudinal diameter were 24 and 7,accounting for 28% and 8% of 85 hybrid combinations. The number of variety of the positive mid}arent and over}arent heterosis of transverse diameter were 26 and 32,accounting for 31%and 38% of 85 hybrid combinations. The number of variety of the positive midgarent and over}arent heterosis of fruit pulp thickness were 42 and 28,accounting for 48 % and 33 % of 85 hybrid combinations. The number of variety of the positive midgarent and over arent heterosis of soluble solid content were were 37 and 15,accounting for 43 % and 18 % of 85 hybrid combinations.

Key words: Pumpkin, Inbred line(parent), Hybrid combinations, Heterosis, Combining ability

CLC Number: 

• S642.03