The Primary Studies Of The Influence Factors And Heredity On The Lycopene Content Of Tomato (Lycopersicum Esculentum Mill.)

This dissertation systematically studied the lycopene contents in different cultivars of fresh consumption tomato, the influence of some environmental factors on the synthesis of lycopene, and its inherence principle by diallel systems and six population joint-analysis. The main results as follow:(1) The contents of lycopene in the 17 cherry tomato cultivars and 33 large-fruit type tomato cultivars differed significantly, the lycopene contents of cherry tomato range between 1702μg/l00g and 6389 μ g/l00g (fresh) , the mean value is 2861 μ g/l00g. the contents of the large-fruit type tomato cultivars range between 979 μ g/l00g and 3408 μ g/l00g, the mean is 1893 μg/l00g.(2)The lycopene contents increase with the ripeness of the fruit at the time of harvest, and the amount of increase differed significantly in different stages. In spring-summer , lycopene content of the same cultivar differ significantly in different protected conditions, and the greenhouse had lowest contents, the net-house had the highest contents of lycopene.(3)Lycopene contents decreased significantly with the decrease of light intensity in open-field, when temperature was higher or lower, the synthesize of lycopene was restrained.(4)The general combining ability among -0.395 ~ 0.242 and the parent 1 have the best g.c.a, the special combining ability between -0.315 and 0.233, the 825 have the best s.c.a. the broad sense hereditability of lycopene in fresh consumption tomato is 91.70%, the narrow sense hereditability is 66.13%, and due to additive-dominant model.(5)A major gene plus additive-dominance-epistasis polygenes dominate the hereditability of lycopene in fresh consumption tomato in the cross between 94 and 95. The major gene hereditability in B,,B2 and F2 are 6.85%, 34.78% and 58.33%, the polygene variations are 58.48%, 30.69%, 0 of their phenotype variations.