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Objective: To investigate the impact of tomato soluble solids content (SSC) is closely related factors and their relationship to provide a theoretical basis for the breeding of varieties of tomato solids content. Method: the process of growth and development of the six varieties of tomato plant growth and yield indicators, physiological indexes of leaves, fruit quality measurement of physiological indicators, analysis of these data with the SSC data with EXCEL, DPS, SPSS 16.0 statistical software, and finally the use of correlation analysis method in the gray system theory in a comprehensive assessment of the close relationship of the six varieties of tomato and the ideal of the main traits of the varieties. Results: 1) tomato fruit SSC and plant height and diameter crude ratio (L / D) was being related, and the correlation coefficient reached a significant level; SSC and was yield, fruit stem ratio (F / S), leaf area index (LAI) a negative correlation, and the correlation coefficient reached a significant level. 2) tomato plants here unlimited growth type fruit with green mature period by severe environmental stress; the tomato resistance index were the content of proline (Pro), leaf soluble sugar, soluble protein, peroxidase (POD); Stress Resistance of tomato varieties to be significantly higher than the growth and variety. 3) all varieties of tomato net photosynthetic rate (A) are showing obvious double peak between the two peaks, one at the bottom, the phenomenon of photosynthesis nap. Overall, the unlimited growth type tomato maximum photosynthetic rate is greater than the maximum photosynthetic rate of growth and tomato. SSC and leaf transpiration rate (E), leaves and air vapor pressure deficit (VPD), stomatal conductance (H2O gas) (gH2O), A, intercellular CO2 concentration (Ci), external CO2 concentration (Ca), leaf indoor relative humidity (rh) have some relevance. 9:00 in the morning when E1 was negatively related, was positively correlated with 12:00 E2, 14:00 E4 was a negative correlation was positively correlated with the E6 evening. 9:00 in the morning when VPD1 positively related, have a high correlation coefficient was negatively correlated with 9:00 in the morning when GH2O1 and A6 was positively correlated, reached a significant level, Ci1, Ca5, Ca6 negative correlation coefficient have reached a significant level, and 9:00 in the morning when rhl was negatively related with 11:00 in the morning RH2, 14:00 rh3 was positively correlated. 4) the tomato fruit SSC and soluble sugar content, organic acid content, Vc content, LYC content showed a positive linear relationship; fruit weight, fruit index was slightly negative linear correlation. Unlimited growth type tomato SSC more limited type of growth, small fruit type fruit. 5) six varieties of the merits of the order of TD41xTD13 gt; TD22xHT16 GT; TD13 gt; TD41 gt; the TD22 gt; HT16. Optimal tomato varieties TD41xTD13.
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