Abstract:

Heterosis performances of F1 by the ratio of positive, transgressive heterosis rate and degree of dominance in tomatoes were studied, with 30 crosses combination from six high inbred parents of many years, according to Griffing complete dealer cross design (p2), in order to provided theoretical basis for the breeding of new varieties and improve main quality characters of tomato. The results showed that, the heterosis of quality characters were ubiquity, in which lycopene (P1), total soluble sugar (P11) and sugar acid ratio (P12) exhibited a strong positive heterosis; the positive degree of dominance of lycopene (P1), soluble solid (P3), total soluble sugar (P11) and sugar acid ratio (P12) in most combinations showed positive dominance.