The article presents the analysis of breeding work with garden roses, carried out in the Nikitsky Botanical Gardens (NBG) from 1824 to the present time. There are three main historical stages, which have different breeding tasks, as well as methods of work: the first stage is connected with the work of N.A. Hartwiss, the second stage – N.D. Kostetsky and the third one – V.N. Klimenko, Z.K. Klimenko and K.I. Zykov. The most significant breeding achievements of the NBG’s rose breeders are indicated. Based on the analysis of the results of the introduction study of garden roses in the NBG, the main features of garden roses cultivation in the Southern Coast of the Crimea (SCC) are specified and the requirements for cultivars created for these conditions are determined. It is established that currently in the breeding work with roses in the NBG, there are four main directions. The first direction is the creation of cultivars with multiple long flowering, the total duration of which can exceed 200 days. A cultivar must endure difficult xerothermic conditions of the Southern Coast in July – August without losing of decorative value. The second task is the selection work with garden groups that are difficult to cultivate in the more northern areas. Among them, under conditions of the SCC, there are highly promising garden groups of miniature and climbing roses. The third direction of breeding is to increase resistance to major fungal diseases affecting roses under the conditions of the SCC. The basic breeding methods to achieve this objective are given. The fourth research line is the creation of cultivars with a strong aroma. These cultivars can be used in aerophytotherapeutic rosaries, arrangement of which in the SCC is relevant in connection with the development of the resort industry.

Research work  was  carried  out  at  the  Pridnestrovian research  Institute of agriculture in 2014-2017 in film greenhouses (spring-summer  and summer turnover) and in the open ground when grown in the spreading and on the trellis. Much attention was paid to the degree and nature of the manifestation of heterosis in F1   hybrids, which were estimated by early and total yield, yield of standard fruits, yield of gherkins. The standards were F1      hybrids: Zubrenok and Ajax. The purpose of the work is the selection of bee-pollinated hybrids of universal cucumber for protected and open ground. Created in  the  Transnistrian  agricultural research Institute pollinated by bees hybrids of cucumber universal destination F1   Korolek, F1   Sverchok, F1   Viurok is characterized by a high yield of gherkins in both factions that is currently the most promising in the areas of plant breeding and seed production of hybrids and commercial production of cucumber.  New  bee-pollinated hybrids: F1   Korolek, F1 Sverchok, F1 Viurok pass state variety testing in the Republic of Moldova and entered in the Register of breeding achievements in Transdniestria in 2017.

The article presents the results of studies of melon culture in the conditions of the Volgograd Zavolzhye. The purpose of scientific research was to determine the dependence of melon culture on the moisture content of crops for their further use in the  development of  the  necessary agricultural practices to increase the yield of melon without reducing the quality of the fruit. Evaluation of the research results showed that the level of water availability of melon crops has a significant impact on the growth and development  of plants. With an increase in total water consumption during the growing season by 18%, plants that are more powerful were obtained. During the formation and maturation of fruits, the length of the lashes is 17.2% more, the leaf area is 20.1% more with an increase in the total weight of the plant by 12.5%. The positive effect of the increased level of water availability of crops on the root system of melon plants was  revealed. With  the  total  water consumption of  2300 m3/ha, the root mass is 6.6% more than the moisture content of 1795 m3 /ha. The depth of the main mass of the roots is 1-3 cm deeper with an increased level of moisture, which contributes to a better use of available moisture by plants with the drying of the upper soil layer. Comparative  evaluation  of the yield of melon with different values of the total water in the vegetative period. The best results were obtained in the cultivation of melon with a moisture  level of 2300 m3  / ha, where the total yield of 31.7% more than the level of moisture 1975 m3  / ha, with larger fruits, the average fruit weight of  1.1  kg  more. Studies have determined the dependence of the biochemical parameters  of melon fruits on the moisture content of crops. Despite the rather high quality of  melon fruit, there was a decrease in dry matter and total sugar and an increase in vitamin "C"with an increased  level of moisture.

One of the urgent tasks at the present time is to obtain and widely use functional foods that have antioxidant  and anticarcinogenic effects, which serve not only to meet human needs  in   proteins,  fats,  carbohydrates, micro  -   and macronutrients,  but also contribute to the immune system, improve the heart and other human organs. For food plants, rich in antioxidant protection components, include perennial onions, from the variety of wild species which are in demand by modern medicine are only very few. The Republic of Komi is classified as the most uncomfortable  territories for human habitation.  In the flora of the Komi Republic there are three types of perennial bows – Allium angulosum  L., A. schoenoprasum L. and A. strictum Schrad.   The collection of the Botanical garden of the Institute of biology, Komi scientific center includes more than 150 species. Comparison of the chemical composition of  four  types  of  onions  from  the Botanical gardens of the Komi scientific center and Moscow state University (MSU) showed that  the  total  content  of flavonoids in  onions, Komi scientific center of  the  BS  is much higher, and the content of selenium is lower than in the same types of BS, Moscow state University. In samples of onions sticking out in the Republic of Tuva, the Republic of Buryatia,  in the Altai Mountains, the Se content is also much higher than in regional species. The soils of the Komi Republic are  depleted  Se,  however, as  shown  by  our research, wild and cultivated species of the genus Allium, are batteries of this trace element. According to our calculations, the use of 100 g of fresh herbs of chives may meet up to 60% of the daily needs of the human body in ascorbic acid, up to 94% manganese, 20% copper, 12% zinc.

The requirements  for garlic powder enriched with selenium, dried by convective drying and homogenized, are established. Selenium-enriched  vegetables have special healing properties and are of interest as a source of selenium. Garlic enriched with selenium is grown in a number of countries (including the USA, Sabinsa) and produced in the form of capsules, tablets and granules  (BAA), as drugs that can protect against cardiovascular diseases and  cancer. The technical conditions of dried garlic with a high content of selenium were studied and identified. Based on these indicators, a standard has been developed «Dried garlic  with  high  content  of  selenium. Technical conditions». The standard was developed for the first time for the Russian Federation. Sodium selenate was applied to the soil  with a total dose of 75 mg / m2  For drying, garlic bulbs in biological ripeness, standard and non-standard, without damage by diseases and pests were used. Cloves were peeled, ground, and dried in a drying cabinet at a temperature of 70°C to constant weight. The resulting material was homogenized, the powder was stored in tightly sealed plastic bags.

The area of greenhouses in Dagestan currently  exceeds 220 hectares, most of which were built over the past 5 years and are high-tech facilities. The aim of our research was to identify highly productive tomato hybrids for growing in winter green-houses and to study the characteristics  of their growth and development in transitional turnover; determination  of the optimal time for sowing seeds and planting tomato seedlings  for transitional turnover; determination  of the level of accumulation of nitrates in the fruits of tomato, depending on the varietal characteristics and growing conditions. Experimental work was carried out in the greenhouse farm LLC Agro-AS, located in the Novolaksky district, p.  Novokuli (Novostroy)  is  a  suburb of Makhachkala.   It  has been established that when growing a tomato under conditions of a transitional culture under specific light conditions, the most expedient are the dates: sowing seeds in the first half of August, planting plants in the green-house in the first and second decade of September. Growing tomato plants during this period allows the plants to enter into the fruiting phase earlier and thereby form a larger number of fruits of greater mass as compared with the later sowing and planting dates. The highest yields were distinguished hybrids: Tomimaru  Mucho F1, Kyoto F1 (19.0 and 18.1 kg /  m2 ). The profitability of the production of hybrids was 70-100%.

The article discusses the issues of import substitution in the market of agricultural products and resources for their production in Russian Federation, ensuring the country's food security. Research results show that since 2014, when the active import substitution policy began, there have been significant changes in the agri-food trade, characterized by a decline in imports and an increase in exports. However, in different product segments of the market the speed of these changes varies. Despite ensuring the country's food independence for most types of agricultural products, the dependence on the import of resources for its production remains significant. At the same time, the demand for agricultural products remains under pressure from declining household income, as well as a significant income differentiation. In this regard, suggestions were made for making adjustments to the doctrine of food security, primarily in terms of assessing the economic affordability of food. Also, an assessment was made of the changes made to the state program for the development of agriculture in conjunction with the strategic objectives of the development of the Russian Federation defined for the period up to 2024. The need to ensure consistency between the tasks assigned to the agro-industrial complex to achieve the country's food security, increasing the export potential of the domestic agri-food products and resources allocated for development, was noted.

Relevance. One of the main components of the spectrum of sunlight is ultraviolet rays – invisible to the human eye short-wave radiation. The influence of these rays on plant life was considered insignificant until recently, but recent studies have shown the fallacy of such conclusions. Ultraviolet has a beneficial effect not only on the human body and animals, but also on plants, including – crops. The destruction of the ozone layer is currently continuing under the influence of anthropogenic factors. In this regard, the study of the effect of ultraviolet radiation on living organisms, including plants, is very relevant from both theoretical and practical points of view. The epidermis of plant leaves and seed shells are permeable to medium-and long-wave UV radiation, so of particular interest is the ultraviolet radiation of the Sun and artificial sources of ultraviolet radiation in the range of 400...180 nm.Purpose of work: to assess the nature of the impact of ultraviolet radiation in the time mode on watermelon seeds using cytogenetic analysis.Methods. The material for research was the seeds of the watermelon variety "Astrakhan". The studies were conducted in 2017-2018.Results. The results of studies have shown that long-term exposure to ultraviolet radiation can affect the physiological processes and anatomical structure of plants, as well as have serious genetic changes: aneuploidy, cytotomy, pyknosis and various chromosomal aberrations that lead to mutations or death of plants. However, plants acquire useful mutations with short-term exposure-0.5-2 hours, which can be used later in selection.

Relevance. Microscopic fungi exhibit the greatest exoenzymatic activity, and xylotrophs are capable of possessing a complex of oxidase and hydrolase enzymes to destroy lignin.Methods. Among the soil micromycetes isolated from the rhizosphere of annual leguminous crops, a search was made for strains that are promising from the point of view of effective microorganism technology, in order to create optimal conditions for increasing soil fertility and crop yields. The detection of total phenol oxidase activity was carried out according to the method of Bavendamm, cultivating the strains on microbiological agar with the addition of an aromatic lignin derivative (0.06% tannin) and the growth factor was calculated. The cellulase activity of the strains was judged by the degree of hydrolysis of the filter paper. Alternaria alternata, Bipolaris, Botrytis fabae, Cunninghamella echinulata, Curvularia lunata, Macrophoma phaseolicola, Trichoderma koningii, Trichoderma viride and Ulocladium botrytis strains were found to cleave lignin and cellulose.Results. When comparing the phenoloxidase activity of the strains, it was proposed to take into account the growth factor, expressed as the ratio of the diameter of the colony on the substrate with the addition of tannin to the diameter of the colony without tannin. Thus, perspective strains of T. koningii and U. botrytis strains with respect to the complex activity of enzymes were identified. The strains C. lunata, A. alternata and B. australiensis showed high cellulase activity. The strain of non-pathogenic soil fungus C. echinulata has the ability to degrade lignin

Relevance. The development of F1 hybrids distinguishing it from cultivars by high productivity, plant uniformity in ripening date, fruit sizes and quality is the promising trend in breeding program in cucumber (Cucumis sativus L.).The aim of the study was to optimize the gynogenesis induction condition in culture of unpollinated ovules in vitro in order to broad the generation of new breeding forms and to accelerate homozygous line production.Materials and methods. Eight promising cucumber accessions from Laboratory of Cucurbit Breeding and Seed Production (FSBSI FSVC) were taken for the study. The protocol developed in Laboratory of Biotechnology (FSBSI FSVC) for production of doubled haploid in Cucurbitaceae family was used in the experiment. The medium IMC with 30 g/L sucrose and 7g/L agar supplemented with 200 mg/L ampicillin and 0.2 mg/L thidiazuron (TDZ) was applied to induce gynogenic development.Results. The half-open bud or flower was shown to be the most suitable to be taken as an explant for cultivation. Highest number of embryo-like structures in all accessions developed from ovaries 2.1-2.6 cm long. Exposure to sterilization solution of sodium hypochlorite for 15 min made ovary wall softer and ovules can be then easily extracted without traumatizing. The traumatized ovule resulted in inhibited gynogenic development. Embryoids and calli had developed in all studied cucumber accessions, but well-formed plants were only obtained in six accessions. In total 26 plants were produced. The maximum gynogenesis induction equal to 63.1% was achieved in accession 1810. Maximum number of plant produced was twelve in accession 1763, but the greatest plant outcome 7.7% of the ovules with induced gynogenesis was observed in accession 1807.