Purpose. Assessing under in vitro conditions the degree of resistance to agents of bacterial diseases of tomato varie­ties which are included into the State Register of plant varieties suitable for dissemination in Ukraine in 2015. Defining integrated biochemical indices of the quality of tomato fruits with different resistance to agents of bacterial disea­ses. Methods. In the course of performance biotechnological methods were used to select callus cells with increased resistance to the agents of bacterial diseases, biochemical ones – determine qualitative and quantitative indicators of the tomato fruit quality, statistical ones – analyse experimental data. Results. Studied tomato varieties of Ukrainian breeding had different resistance to warm cells of agents of bacterial speck, bacterial black spot and to exopolysaccharides of bacterial canker agents. ‘Chaika’, ‘Klondaik’, ‘Zoreslav’, ‘Flandriia’, ‘Legin’, ‘Oberig’, ‘Atlasnyi’, ‘Gospodar’ and ‘Kimmeriiets’ tomato varieties were distinguished by high palatability traits and quality. Conclusions. It was found that tomato varieties ‘Chaika’, ‘Klondaik’ and ‘Zoreslav’ are resistant to bacterial canker, bacterial speck and bacterial black spot; ‘Flandriia’ and ‘Legin’ – to bacterial black spot, ‘Oberig’, ‘Atlasnyi’, ‘Gospodar’ and ‘Kimmeriiets’ – to bacterial speck.

Purpose. Comparative evaluation of varieties of tomato bred by Kyiv experimental station of the Institute of vege­tables and melons (IVM) NAAS of Ukraine with allowance for different fruit shapes. Methods. Field, laboratory, statistical ones. Results. Since varietal characteristics can greatly influence the course of the growth process, the experiment included phenological observations of plants growth and development, biometric measurements of plants and fruits, productivity records, besides, biochemical values of fruits with various shape were defined (flat-round and plum-shaped fruits). Varieties with the highest yield, best biochemical values and earlier fruit ripening were identified. Conclusions. Among the samples of tomato with flat-round fruits, Zoren variety had the shortest time interval from mass germination up to early ripening of fruits, Myroliubivskyi variety – in the group of plum-shaped fruits. In the first group Atlasnyi variety had the highest yield, in the se­cond – Khoriv variety. Atlasnyi (flat-round fruits) and Oberig (plum-shaped fruits) varieties had the best biochemical values. Varieties with plum-shaped fruits excelled samples with flat-round fruits at biochemical composition.

The article presents the estimation of economic and biological characteristics of indeterminant tomato hyb­ rids (Raisa F1, Macarena F1, Emotion F1, Anabel F1, Mariachi F1) under conditions of winter hydroponic. The earliest emergence of fruits is established for Macarena F1 tomato hydrid. The total number of brushes, flo­ ers and w fruits formed on the plant during the vegetation period, is determined. The degree of fruit inception, yield per plant and average weight of the plant are measured. The monthly dynamics of hybrid tomato crops is presented. The largest harvest was collected through May to July. Marketable and non-marketable portions of the harvest and commercial quality of tomato fruits are determined. A close correlation between fruit weight and fruit yield is established. The Macarena F1 hybrid is distinguished as the most precocious and high-yielding variety.

It is determined that crop cultivation systems (continuous culture and its interruption by crop rotation links with different fertilizer backgrounds) influence the productivity and economic efficiency of tomato and cucumber cultivation under rainfed conditions in Right-Bank of Forest-Steppe zone in Ukraine. Reported calculations show the increased level of profitability of the continuous crop growing in case of interruption by annual crop rotation link against the background of mineral nutrition, but additional organic fertilizers allow to get more profit per unit area.

The article features results of studying F1 hybrids of tomato inheriting productivity factors. 21 original hybrid forms and 57 F1 tomato hybrids in green-house have been studied. The efficiency of selecting genotype of valuable plants by genotype is substantiated.

Purpose. Comparative evaluation of varieties of tomato bred by Kyiv experimental station of the Institute of vege­tables and melons (IVM) NAAS of Ukraine with allowance for different fruit shapes. Methods. Field, laboratory, statistical ones. Results. Since varietal characteristics can greatly influence the course of the growth process, the experiment included phenological observations of plants growth and development, biometric measurements of plants and fruits, productivity records, besides, biochemical values of fruits with various shape were defined (flat-round and plum-shaped fruits). Varieties with the highest yield, best biochemical values and earlier fruit ripening were identified. Conclusions. Among the samples of tomato with flat-round fruits, Zoren variety had the shortest time interval from mass germination up to early ripening of fruits, Myroliubivskyi variety – in the group of plum-shaped fruits. In the first group Atlasnyi variety had the highest yield, in the se­cond – Khoriv variety. Atlasnyi (flat-round fruits) and Oberig (plum-shaped fruits) varieties had the best biochemical values. Varieties with plum-shaped fruits excelled samples with flat-round fruits at biochemical composition.