Abstract:

For the better and faster assessment of tomato flesh color, location-related QTLs to improve the quality of the color in tomato flesh, two cultivars with significant difference in lycopene content were used for the study of inheritance pattern of lycopene content in tomato flesh. Six generations F1, F2, backcrosses B1 and B2 and their parents P1 and P2 were used to study the inheritance of lycopene content traits. The results showed that the segregating population of F2, B1 and B2 appeared two peaks or single peak skewed distribution; the major gene showed the significantly adding effect and the polygene had the greater influence in distribution of lycopene. It indicated that inheritance of lycopene in tomato flesh was quantitative traits controlled by polygene. Combination analysis of six generations proved that a major gene plus additive-dominance polygenes dominate the inheritance of lycopene in tomato flesh (D-2 model). The major gene heritability playing a main contribution is 27.39%~66.93%, the polygene heritability is 12.09%~48.44%. Therefore, utilizing sexual hybridization breeding can increase and regulate high lycopene content in early generation, being beneficial to discovery of new QTLs.