Dry matter content and its changing dynamics in the investigated nor and rin tomato genotypes
2001
Cvikic, D. (Institut za istrazivanja u poljoprivredi Srbija, Smederevska Palanka (Yugoslavia). Centar za povrtarstvo) | Ljubanovic-Ralevic, I. | Surlan-Momirovic, G.
We investigated dry matter content and its changing dynamics in two tomato genotypes with normal ripening period (NR-1 and NR-2) and two genotypes with shelf life (NR-10 and NR-12, with nor or rin gene respectively), as well as their hybrids of F1 and F2 generation. The fruits were harvested 65 days after pollination, stored in controlled conditions, and measured at the intervals of 10 days. Dry matter content was determined by dehydration at the temperature of 105 deg C of four hours' duration. According to the recorded values of the analysed chemical features of dry matter content and its changing dynamics, homogeneity of the variance for shelf life was tested. It included the induvidual variances for each term separately. On the basis of the analysis of the variance homogeneity, we made a summary variance analysis with the logarithm data for all the terms of investigation. Significant differences were recorded between the genotypes with normal ripening period and the ones with shelf life. We also recorded linear contrasts and tested the homogeneity of the inclination coefficient on the basis of the calculated values from the regression analysis. By applying nor and rin genes in the process of selection, we create the hybrids with shelf life greater fruit firmness and higher percentage of dry matter content. In this way, we could facilitate not only a longer storing period of the harvested fruits but a successful transport at longer distances to the market with minimal losses in quality and quantity as well.
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