RESULTS
Morphological characteristics of fruit
The results from the analysis of the morphological traits of the fruits of cherry tomato are most important from production point of view. Differences between genotypes for the morphological traits fruit weight, fruit width, fruit length and fruit index were observed. Fruit weight varied in the range 14.81 - 28.92 grams with the tomatoes grown at open field and 14.80-31.56 grams for the cherry tomato genotypes grown under plastic. Regarding individual genotype performance, with both growing environments genotypes Ch 7/2 and Ch 1/5 had largest value for fruit weight, while genotype Ch 9/2 had the lowest weight registered in both growing environments.
The means for fruit width (4.03 cm) and fruit length (3.76 cm) of the fruits from the genotypes in protected environment varied within a narrow range for all genotypes and were higher in comparison to fruits grown under plastic tunnel (Table 1 and 2).
As all genotypes were with red color and round fruit shape, the fruit shape and color of the fruits in our research proved as the most stable properties, along with pericarp thickness and number of locules.
Chemical composition
In our tests the content of total sugar varied in the range 2.84 - 3.26%. Maximum content of total sugars was observed with genotype Ch 9/2 (3.26%) and Ch 1/5 (3.20%), and lowest for genotype Ch 7/2 (2.84%). According to these results, all genotypes in our study can be considered as genotypes with high content of total sugar. Differences among genotypes for titratable acidity of cherry tomato were significant and varied from 0.26% with genotype Ch 9/2 to 0.42% with Ch 7/2 (Table 3).
In addition, there were significant differences between the dry matter content in our experiment in the content of soluble solids. The highest value was obtained with genotype Ch 1/5 (6.78%) and Ch 9/2 (4.75%), followed by the control variety C1 with 4.80% and Ch 1/4 (4.33%). Genotype Ch 7/2 showed smallest value for dry matter content of 3.10% (Table 3).