The Analysis Of The Combining Ability Of Seven Pumpkin Inbred Lines

21 F1 hybrids were confected by 7 inbred lines of pumpkin (Cucurbita moschata) based on Griffing complete diallel cross method 2 in the experiment. According to the results of the analysis of variance of six quality and nineteen agronomic characters, their combining ability were caculated except for weight per tender fruit and yield of tender fruit, and their genetic behaviors were estimated.7 inbred lines and 21 F1 hybrids were evaluated based on the study in the experiment.General combining ability analysis showed that inbred P3 were the best performance in transverse diameter of mature fruit, yield of mature fruit, weight per mature fruit, first male flowering date, carotenoid content were significant for general combining ability effects. Inbred PI can be used as material for high soluble protein content and late-maturing. Inbred P4 and P6 can be used as materials for early-maturing.Specific combining ability analysis showed that cross P1×P2 were the best in the yield, most of it's characters were high positive effect or positive effect. Cross P5×P7 is a material with ample Vc, soluble protein, soluble solid matter. Cross P5×P6 is a material with ample Vc, Carotenoid, soluble solid matter. Cross P1×P6 is a material with ample Soluble protein, Soluble solid matter. Cross P3×P5 is a material with ample soluble sugar and high yield. And the cross P3×P4 with the most Carotenoid content.Analysis of genetic variance results showed that Vc content, longitudinal diameter of mature fruit, peduncle diameter, dry substance content, soluble sugar content, soluble solid matter content, yield of mature fruit, peduncle length of tender fruit, petiole length, petiole diameter, leaf length, leaf width, main stem diameter, carotenoid content were mainly influenced by the non-add gene effects. Soluble protein content, transverse diameter of mature fruit, weight per mature fruit, the node for bearing the first male flower were influenced by the add gene effects and the non-add gene effects, mainly by the non-add gene effects. First female flowering date were influenced by the add gene effects and the non-add gene effects, mainly by the add gene effects. The node for bearing the first fruit, first male flowering date, flesh thickness of mature fruit, the node for bearing the first female flower were influenced by the add gene effects and the non-add gene effects.Heritability analysis showed that longitudinal diameter of mature fruit, carotenoid content, soluble sugar content, petiole diameter, leaf length with high broad-sense heritability, so these traits can be selected in the early generations. First female flowering date and the node for bearing the first female flower with high broad-sense heritability, so these traits can be selected in the late generations. Peduncle diameter, peduncle length of tender fruit, the node for bearing the first male flower, dry substance content, the four traits with both low broad-sense heritability and narrow-sense heritability, noting that these characters had great influence by the environment. There's no obvious result in the selection neither in the early or late generations.Correlation analysis showed very significant positive correlation between the leaf length, leaf width, transverse diameter of mature fruit, weight per mature fruit and yield of mature fruit. Result showed significant positive correlation between the longitudinal diameter of mature fruit and yield of mature fruit.