Cherry Tomatoes, The Number Of Genetic Effects

This trait draw on the second analytic method of diallel crosses design ,namely, six parents produced fifteen hybrid combinations, add up to twenty-one genotypes, to analyze the genetic model of the main quantitative characters .Results indicated :the heredity of vitamin C content > lycopene content > carotene contend fruit shape index> fruit number per plant-, mean fruit weight can be explained by the additive dominative genetical model. The more recessive genes are included in the total genes of the characters vitamin C and lycopene, the more contents of them are contained in the fresh fruits. On the contrary, the trait, fruits per plant is that the more dominant genes are, the more fruit number maybe have. The number of recessive and dominant genes distributing in parents was different according to the characters. In-addition, this experiment determined the combining ability. By absolute order and the significance of the difierence .we consider that XIAOHUANGLK Koreke> and CHERRY I are the better parents, and DANMAIxXIAOHUANGLI is the best combination. At last the analysis of heterosis showed total yield and early yield per plant had higher positive heterosis, but quality character such as vitamin C had higher negative heterosis. There is a contradiction between yield and quality if we want to utilize Fl hybrids.