Genetic population derived from a line Agol( dwarf) and Xue1( vine) was used to analyze the inheritance of internode length in Cucurbita maxima. The result showed that dwarf and vine was determined by nuclear genes. Developmental reversal of dominance were found in this study. The genetic model showed that the internode length were controlled by two major gene( genetic model E1) in early development and reversal of dominance stage,and the major gene could explain more than 70% variation. But in the late dev...