Abstract: The research discussed the genetic mechanism of vitamin C （Vc） content in combination test Ma7 × W15. The materials were inbred lines（ Ma7,W15 ）,in which Ma7 （P1）was relatively low levels of vitamin C line and W15 （P2） relatively high vitamin C content line,by applying the joint segregation analysis of a mixed genetic model of major gene plus poiy-gene in six generations to study the genetic mechanism of vitamin C content. The results of analysis suggested that the optimum model of vitamin C was a pair of additive major genes plus additive-dominant pol- ygenes mixed inheritance model,in B1, B2and F2populations,the estimated heritability of major genes was 47.47%, 36.34%,52.59%, respectively. The heritability of poly-genes was 18.47%, 0 and 21.63%, respectively. The range of environmental variance in phenotypic variance was 25.78% - 63.66%, the environment factors had a greater role in genetic of vitamin C of cucumber. Results demonstrated that polygenes had played an important role in determining the vitamin C content in curcumber,and it would be more efficient to conduct selection in hight gen- eration for the trait.

Key words: Cucumber（ Cucumis sativus L. ）, Vitamin C Major gene plus polygenes Heredity

CLC Number: 

• S642.03