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The article presents a model of a commercial variety of strawberry for the conditions of central Russia. This model covers 40 features and properties, which are combined into three groups: 1) plant resistance to a complex of adverse abiotic and biotic factors (adaptive potential); 2) productivity and quality of products; 3) manufacturability of the variety. In the middle zone of Russia, adapted strawberry varieties should develop normally and produce a high quality crop of 20-25 t/ha with the sum of temperature from 1800 to 2000 oC and the duration of the vegetative period from 130 to 180 days. They must withstand spring frosts, sharp and prolonged cooling during the vegetative period, more frequent droughts and high temperatures up to +36 oC, early-winter frosts up to -25 oC in the absence of snow, the frosts up to -36 oC in winter under snow cover, temperature drops from 0…+3 oC to -20 oC in December-March after thaws and have fi eld resistance to numerous diseases and pests. The parameters of high productivity of a biennial strawberry bush are: the number of fl ower stalks ≥10 pieces, the number of berries ≥50 and the average weight of fruits for all collections is more than 10.0 g. The ideal strawberry variety should contain >12 % RSV, >8 % sugars, >80 mg% ascorbic acid, >80 mg% anthocyans and no more than 1.5 % organic acids in berries. In addition to the high taste qualities and biochemical composition, strawberry berries should be attractive, one-dimensionally, have good transportability and keeping quality. According to the ideal variety model, the crushing force of strawberry berries, which determines their preservation during harvesting and long-term transportation, must be at least 10.0 N. The combination of the above-mentioned features and properties in one genotype is a task of the future, but systematic researches in this direction should be carried out constantly. The creation and gradually updating of sources and donors for each of breeding features on a genetically diverse basis will accelerate the implementation of this model into specifi c varieties.

The goals and objectives of breeding and nursery centers in the innovative development of horticulture in Russia are determined. The priority role of a fruit plant (variety, scion-rootstock combination) in the formation of modern technologies is actualized. The analysis of the availability of planting seedlings of domestic production has been presented. The priority of developing varietal, technological, and phytosanitary policies in the development of nursery production is determined. Attention is focused on the role of breeding and nursery centers in the production of planting material and seedlings of the highest quality categories. The structure of organization of breeding processes is presented. Regulation of production of certified planting material of the highest quality categories is represented by the structure of the organization of nursery processes. The definitions of “breeding and nursery center” depending on the form of organization are provided, the costs of organizing a breeding and nursery center are calculated, and the criteria characteristics that it should have are given.

In recent years, Russian gardeners have become interested in apple seed stocks, since they are indispensable for growing planting material of the highest quality categories for the purpose of setting up mother-cuttings, nurseries of clonal stocks and intensive orchards intended for obtaining organic products. The advantage of apple seed stocks is not only in a powerful root system and resistance to biotic and abiotic stressors, but also in the absence of a harmful viral infection from which almost all clonal stocks in Russia suffer. The opinion that trees are more vigorous on seed stocks, and orchards later enter in the fruiting period is erroneous, since there are developed technologies that make it possible the establishment of intensive apple tree plantations that enter the fruiting period 2 years after grafting. Among the apple clonal stocks, the intensively propagated form 54-118 is characterized by good anchoring and winter hardiness. Due to the lack of scientific data on the comparative study of seed and clonal stocks in the context of scion/stock combinations, we have begun a long-term study in order to identify the most promising of them in terms of early fruitfulness and high productivity. Long-term studies were carried out on the basis of the Orenburg branch of the Federal Horticultural Research Center for Breeding, Agrotechnology and Nursery from 2000 to 2020. The analysis of the results of the tests carried out shows that all the plantings on stocks 54-118 and 64-143 turned out to be early fruitfulness, and the stocks were suitable for intensive gardening, since the varieties grafted on them have a restrained growth force and a compact crown. The smallest height from 1.9 to 2.8 m was noted in trees on the 54-118 stock, on the 64-143 stock this parameter, depending on the variety, varied from 3.2 to 3.8 m. The largest crown diameter (over 3.0 m) and the largest projection area of the crown had plantings of all varieties on the seed stock of Purple Ranetka. The yield of apple tree plantations on stock 54-118 varied from 10.4 (Serebryanoe Kopitce variety) to 14.1 t/ha (Chudnoe variety), and revenue from the sale of products from 1 ha ranged from 263.1 to 356.7 thousand rubles. The highest profitability on clonal stock 54-118 was distinguished by perennial plantations of the Chudnoe variety (83.8 %). On stock 64-143, the yield of plantings varied from 10.2 t / ha (Serebryanoe Kopitce variety) to 13.5 t / ha (Chudnoe variety), the proceeds from the sale of products per hectare also varied from 258.1 thousand rubles. up to 341.5 thousand rubles. The highest profitability of production was noted in the plantations on the stock 64-143 of the variety Mechtatelnitsa (82.2 %). The average yield of apple varieties grafted on the seed stock of Purple Ranetka ranged from 8.2 (variety Letnee Polosatoe (K) to 9.3 t / ha (variety Serebryanoe Kopitce); high profitability of production was distinguished by plantings of the variety Mechtatelnitsa on ranetka purpurovaya (16.3 %).

The article presents the results of studies of the chemical composition, commercial qualities and taste of berries of promising strawberry varieties breeding of the All-Russian Horticultural Institute for Breeding, Agrotechnology and Nursery (Moscow) in the conditions of the Orenburg Urals. The studies were carried out in 2016-2018 on the basis of the Orenburg Experimental Station of Horticulture and Viticulture of the All-Russian Horticultural Institute for Breeding, Agrotechnology and Nursery in specific conditions, where almost annually dry and moderately dry climatic periods were observed during the formation of the yield (May-June). A comparative evaluation of varieties on the content of sugars, acids, vitamin C in berries, taste and attractiveness of appearance is given. The dependence of the studied parameters on the genotype of the variety and vegetation conditions was established. Depending on the variety and year, the content of soluble solids varied from 7.2 to 10.2 %, with an average content of 8.9 %; total acidity varied from 0.8 to 1.2 %, with an average content of 1.0 %; the content of ascorbic acid (vitamin C) was from 45.1 to 78.5 mg/100 g, with an average content of 56.4 mg/100 g. Varieties with high parameters of tasting evaluation (Darenka, Kokinskaya Zarya, Studencheskaya), soluble solids (Rosinka, Studencheskaya) and ascorbic acid (Kokinskaya Zarya, Bereginya) were revealed. They are recommended to be grown to obtain fresh consumption products and as processing products of various directions. Bereginya, Darenka and Rosinka varieties surpass control varieties in certain biochemical parameters and can be used in breeding in the Urals region to obtain new genotypes with an increased content of a specific biologically active substance. The variety Tsaritsa is selected for high commodity qualities of berries (weight, dessert taste, attractiveness of appearance) and is recommended for commercial production of berries and involvement in breeding process. It has been established that the taste of berries is determined by a complex of acids, sugars and aromatic substances. This parameter was greatly influenced by weather conditions, from which air temperature and precipitations were determining.