Purpose. To study the effect of weather conditions on grain quality in soft spring wheat lines that are undergoing competitive variety trial. To identify indices to be least affected by weather conditions. To investigate the correlation dependence between grain quality indices in the years with contrasting weather conditions and conduct the analysis of variance. Methods. Parameters of grain and flour quality of bread spring wheat lines were determined using conventional methods at the laboratory of grain quality of V. M. Remeslo Myronivka Institute of Wheat, NAAS of Ukraine, protein content in flour was measured with the use of the SPECTRAN 119M device. Results. Contrasting weather conditions were considered including arid ones (2013) – that had negative effect on 1000 kernel weight, but at the same time positively influenced the averaged grain quality indices; with excess humidity (2014) – they resulted in decreasing of all technological indices; optimal ones (2015) – allowed to obtain maximum indices of grain and flour quality. Paired coefficients of correlation between different para­meters of grain and flour quality were calculated. The most number of strong and medium correlations was found in a dry year (33.3%), the smallest one – in a wet year (13.0%). Such indices as flour strength, dough dilution and protein content depended on the conditions of the growing year least of all. Grain-unit response was the most considerable to the humid conditions of the year. The analysis of variance showed that climatic conditions had significant effect on the quality indices of grain and flour. At the same time, an important genotypic component was revealed in indices of dough resilience (63%), bread volume and rating (61 and 53% respectively), the flour strength (42%), crude gluten quality (33%), bread porosity (30%). With climate variations, the genotypic conditionality of the content of protein and especially crude gluten was expressed insignificantly. Conclusions. When creating high quality cultivars, plant breeders should be guided by such indices as flour strength, dough resilience, gluten quality, bread volume and rating as only they are more genetically determined

Purpose. To study the effect of weather conditions on grain quality in soft spring wheat lines that are undergoing competitive variety trial. To identify indices to be least affected by weather conditions. To investigate the correlation dependence between grain quality indices in the years with contrasting weather conditions and conduct the analysis of variance. Methods. Parameters of grain and flour quality of bread spring wheat lines were determined using conventional methods at the laboratory of grain quality of V. M. Remeslo Myronivka Institute of Wheat, NAAS of Ukraine, protein content in flour was measured with the use of the SPECTRAN 119M device. Results. Contrasting weather conditions were considered including arid ones (2013) – that had negative effect on 1000 kernel weight, but at the same time positively influenced the averaged grain quality indices; with excess humidity (2014) – they resulted in decreasing of all technological indices; optimal ones (2015) – allowed to obtain maximum indices of grain and flour quality. Paired coefficients of correlation between different para­meters of grain and flour quality were calculated. The most number of strong and medium correlations was found in a dry year (33.3%), the smallest one – in a wet year (13.0%). Such indices as flour strength, dough dilution and protein content depended on the conditions of the growing year least of all. Grain-unit response was the most considerable to the humid conditions of the year. The analysis of variance showed that climatic conditions had significant effect on the quality indices of grain and flour. At the same time, an important genotypic component was revealed in indices of dough resilience (63%), bread volume and rating (61 and 53% respectively), the flour strength (42%), crude gluten quality (33%), bread porosity (30%). With climate variations, the genotypic conditionality of the content of protein and especially crude gluten was expressed insignificantly. Conclusions. When creating high quality cultivars, plant breeders should be guided by such indices as flour strength, dough resilience, gluten quality, bread volume and rating as only they are more genetically determined

Purpose. To analyze the Ukrainian names of the fruit crops which varieties are undergoing scientific and technical examination. Results. Names of fruit crops form a separate terminological system based on one-word fruit plant names. Names of new introduced fruit crops usually are borrowed from the language of that country where the crop has extended and whence it has spread, or on the basis of a Latin generic name. Conclusions. The registered varieties of fruit plants in Ukraine belong to 48 crops. Formation of names of fruit crops has begun in ancient times and is continuing until now. Crop names, as a rule, consist of one word; two-word names occur as an exception, if so, an adjective should be places ahead of a noun. Names of fruit crops and the name of botanic taxa are specific, belong to different terminological systems and perform different functions.

Purpose. To analyze the Ukrainian names of the fruit crops which varieties are undergoing scientific and technical examination. Results. Names of fruit crops form a separate terminological system based on one-word fruit plant names. Names of new introduced fruit crops usually are borrowed from the language of that country where the crop has extended and whence it has spread, or on the basis of a Latin generic name. Conclusions. The registered varieties of fruit plants in Ukraine belong to 48 crops. Formation of names of fruit crops has begun in ancient times and is continuing until now. Crop names, as a rule, consist of one word; two-word names occur as an exception, if so, an adjective should be places ahead of a noun. Names of fruit crops and the name of botanic taxa are specific, belong to different terminological systems and perform different functions.

Purpose. To determine morphological and morphometric features of vegetative and generative organs of Persica species and varieties under the conditions of the Forest-Steppe zone of Ukraine for further use in breeding. Methods. Biological (morphological analysis) and statistical (processing of morphometric parameters) ones. Results. It was found that except ternate multiple buds, in peach hybrid ‘Suputnyk’collateral buds were prevalent which was not common to other tested varieties and species. Buds of each species and variety have a certain number of scales. The most scales were observed in ‘Suputnyk’. Pubescence of abaxial side of the leaf in P. davіdiana and ‘Suputnyk’ plants was not revealed. Species of P. vulgaris (‘Pecherskyi’, ‘Antotsianovyi’, ‘Poleskyi’) was characterized by increase in size of leaf blades, flowers and fruits. The distinctive features of P. davidiana and ‘Suputnyk’ are that stamens were accumulated in their flowers while in P. vulgaris they are branched. Raphe of a P. vulgaris stone protrudes above the edges of the bordering creases and consists of a number of narrow plates. Conclusions. For the breeding purposes, plants have an advantage for some basic criteria: the most flower buds that is common to interspecies hybrid ‘Suputnyk’; increase in photosynthetic productivity of the leaf apparatus to be typical for the variety ‘Pecherskyi’; large fruits that ‘Pecherskyi’ variety is noted for; intense red color of fruits that is inherent feature of ‘Antocianovyi’ variety.

Abstract One of the most promising aquaculture species is the Atlantic bluefin tuna (Thunnus thynnus) with high market value; disease control is crucial to prevent and reduce mortality and monetary losses. Microsporidia (Fungi) are a potential source of damage to bluefin tuna aquaculture. A new microsporidian species is described from farmed bluefin tunas from the Spanish Mediterranean. This new pathogen is described in a juvenile associated with a highly severe pathology of the visceral cavity. Whitish xenomas from this microsporidian species were mostly located at the caecal mass and ranged from 0.2 to 7.5 mm. Light and transmission electron microscopy of the spores revealed mature spores with an average size of 2.2 × 3.9 μm in size and a polar filament with 13–14 coils arranged in one single layer. Phylogenetic analysis clustered this species with the Glugea spp. clade. The morphological characteristics and molecular comparison confirm that this is a novel microsporidian species, Glugea thunni. The direct life-cycle and the severe pathologies observed makes this parasite a hard risk for bluefin tuna cultures.

Purpose. To establish biological features of plants growth and development and the formation of Miscanthus giganteus planting material depending on the cultivation technology elements. Methods. Field, laboratory, visual, weight measu­ring, mathematical and statistical ones. Results. The features of the growth and development of the miscanthus bioenergy crop were investigated including the formation of planting material depending on the combined technology elements application during the planting time, namely: planting time, rhizome mass, the granules and the MaxiMarin absorbent gel. It was established that the increase in plant height and leaf area as well as the miscanthus stems formation was depended on both the rhizome planting time, their size, and the use of the absorbent. During three-year period, increase in plant height was more intensive and leaf area was largest in case of the absorbent application, as compared to the control during all phases of the development for the first and the second planting time regardless of rhizome mass. On the average, the largest leaf area – 1905,9 cm3 – was in the final stage of vegetation in the context of the second planting time for large rhizomes and application of granules and absorbent gel jointly. Increasing the ground mass due to plant height, leaf area and the number of stems benefited the photosynthesis productivity intensity, that influenced the root system increase, and consequently the output of the miscanthus planting material. It was found that there are direct strong correlation between these indices and the rhizome mass. Ground mass growing is contributed to the increase in the rhizome mass, and accordingly the output of the planting material – rhizome. In case of application of granules and absorbent gel jointly, the ground mass of the miscanthus was growing most intensively and accordingly the rhizome mass was the largest, which in the first year of small rhizomes planting was twice as much as compared to the control and was equal to 1090.5 g, for large rhizomes planting this index was respectively 2.4 times more and equal to 1763.9 g. During the second planting time, the application of granules and absorbent gel jointly resulted in the rhizomes mass increase for small rhizomes planting 1.9, large rhizomes – 2.1 times more as compared to the control. Conclusions. Direct strong correlations were established bet­ween the intensity of the ground mass growth – the height of plants, the number of leaves, leaf area, the number of buds and the rhizome mass. The growth of the ground mass of plants was contributed to the increase of the root system, and consequenly the output of planting material. In all sta­ges of plant development, the increase of the rhizome mass was more intensive in case of the absorbent application regardless the time of rhizome planting, as compared to the control. The application of granules and absorbent jointly allowed to form the largest rhizome mass.

Цель. Выявить биологические особенности роста и развития растений и формирования посадочного материала мискантуса гигантского в зависимости от элементов технологии выращивания.Методы. Полевой, лабораторный, визуальный, измерительно-весовой и математико-статистический. Результаты. Исследованы особенности роста и развития биоэнергетической культуры мискантуса, формирования посадочного материала в зависимости от комплексного применения элементов технологии, а именно: сроков посадки, массы ризом, а также гранул и геля абсорбента MaxiMarin в период посадки. Установлено, что прирост высоты растений, увеличение площади листьев и формирование стеблей мискантуса зависели как от сроков посадки ризом, их величины, так и от применения абсорбента. За трёхлетний период прирост высоты растений был более интенсивным, а площадь листовой поверхности – наибольшей при применении абсорбента по сравнению с контролем во всех фазах развития и при обоих сроках посадки независимо от массы ризом. В среднем наибольшей – 1905,9 см3 – площадь листовой поверхности была на период окончания вегетации при втором сроке посадки крупных ризом при совместном использовании гранул и геля абсорбента. Увеличение наземной массы за счет высоты растений, площади листовой поверхности и количества стеблей способствовало повышению продуктивности фотосинтеза и влияло не только на урожайность культуры, но и на увеличение корневой системы выхода посадочного материала мискантуса. Установлены прямые сильные корреляционные связи между этими показателями и массой корневища. С нарастанием наземной массы увеличенивалась масса корневища и, соответственно, выход посадочного материала – ризом. При совместном внесении гранул и использовании геля абсорбента прирост наземной массы был наиболее интенсивным и, соответственно, наибольшей была масса корневища: при первом сроке посадки малых ризом – вдвое, при посадке больших ризом – в 2,4 раза больше, чем на контроле и составляла 1090,5 г, при посадке малых ризом – 2,4 раза и 1763,9 г соответственно. При втором сроке совместное использование гранул и геля абсорбента обеспечило увеличение массы корневища при посадке малых ризом в 1,9 раза, больших – в 2,1 раза по сравнению с контролем.Выводы. Между интенсивностью нарастания наземной массы – высотой растений, количеством листьев, площадью листовой поверхности, количеством почек и массой корневища выявлены прямые сильные корреляционные связи. Нарастание наземной массы растений способствовало увеличению корневой системы – выходу посадочного материала. Во всех фазах развития растений нарастание массы корневища было интенсивнее при использовании абсорбента, независимо от сроков посадки ризом, по сравнению с контролем. Совместное использование гранул и геля абсорбента обеспечило формирование наибольшей массы корневища. | Purpose. To establish biological features of plants growth and development and the formation of Miscanthus giganteus planting material depending on the cultivation technology elements. Methods. Field, laboratory, visual, weight measu­ring, mathematical and statistical ones.Results. The features of the growth and development of the miscanthus bioenergy crop were investigated including the formation of planting material depending on the combined technology elements application during the planting time, namely: planting time, rhizome mass, the granules and the MaxiMarin absorbent gel. It was established that the increase in plant height and leaf area as well as the miscanthus stems formation was depended on both the rhizome planting time, their size, and the use of the absorbent. During three-year period, increase in plant height was more intensive and leaf area was largest in case of the absorbent application, as compared to the control during all phases of the development for the first and the second planting time regardless of rhizome mass. On the average, the largest leaf area – 1905,9 cm3 – was in the final stage of vegetation in the context of the second planting time for large rhizomes and application of granules and absorbent gel jointly. Increasing the ground mass due to plant height, leaf area and the number of stems benefited the photosynthesis productivity intensity, that influenced the root system increase, and consequently the output of the miscanthus planting material. It was found that there are direct strong correlation between these indices and the rhizome mass. Ground mass growing is contributed to the increase in the rhizome mass, and accordingly the output of the planting material – rhizome. In case of application of granules and absorbent gel jointly, the ground mass of the miscanthus was growing most intensively and accordingly the rhizome mass was the largest, which in the first year of small rhizomes planting was twice as much as compared to the control and was equal to 1090.5 g, for large rhizomes planting this index was respectively 2.4 times more and equal to 1763.9 g. During the second planting time, the application of granules and absorbent gel jointly resulted in the rhizomes mass increase for small rhizomes planting 1.9, large rhizomes – 2.1 times more as compared to the control.Conclusions. Direct strong correlations were established bet­ween the intensity of the ground mass growth – the height of plants, the number of leaves, leaf area, the number of buds and the rhizome mass. The growth of the ground mass of plants was contributed to the increase of the root system, and consequenly the output of planting material. In all sta­ges of plant development, the increase of the rhizome mass was more intensive in case of the absorbent application regardless the time of rhizome planting, as compared to the control. The application of granules and absorbent jointly allowed to form the largest rhizome mass. | Мета. Виявити біологічні особливості росту й розвитку рослин та формування садивного матеріалу міскантусу гігантського залежно від елементів технології вирощування.Методи. Польовий, лабораторний, візуальний, вимі­рювально-ваговий, математично-статистичний.Результати. Досліджено особливості росту й розвитку біоенергетичної культури міскантусу, формування садивного матеріалу залежно від комплексного застосування елементів технології, а саме: строків висаджування, маси ризом, гранул і гелю абсорбенту MaxiMarin у період садіння. Встановлено, що приріст висоти рослин, збільшення площі листків та формування стебел міскантусу залежали як від строків садіння ризом, їх величини, так і від застосування абсорбенту. За трирічний період приріст висоти рослин був інтенсивнішим, а площа листкової поверхні – найбільшою у разі застосування абсорбенту, порівняно з контролем у всіх фазах розвитку за обох строків садіння незалежно від маси ризом. У середньому найбільша площа листкової поверхні – 1905,9 см3 – була на період закінчення вегетації за другого строку садіння великих ризом за спільного використання гранул та гелю абсорбенту. Збільшення наземної маси за рахунок висоти рослин, площі листкової поверхні та кількості стебел сприяло підвищенню продуктивності фотосинтезу, що впливало на збільшення кореневої системи – виходу садивного матеріалу міскантусу. Виявлено прямі сильні кореляційні зв’язки між цими показниками та масою кореневища. З наростанням наземної маси збільшувалася маса кореневища, а відповідно й вихід садивного матеріалу – ризом. За спільного внесення гранул і використання гелю абсорбенту найінтенсивніше наростала наземна маса рослин і, відповідно, найбільшою була маса кореневища: в перший строк садіння малих ризом вдвічі більшою, ніж на контролі та становила 1090,5 г, за садіння великих ризом – у 2,4 раза та 1763,9 г відповідно. За другого строку спільне застосування гранул і гелю абсорбенту забезпечило збільшення маси кореневища за садіння малих ризом у 1,9, великих – у 2,1 раза порівняно з контролем.Висновки. Між інтенсивністю наростання наземної маси – висотою рослин, кількістю листків, площею листкової поверхні, кількістю бруньок і масою кореневища виявлено прямі сильні кореляційні зв’язки. Наростання наземної маси рослин сприяло збільшенню кореневої системи – виходу садивного матеріалу. У всіх фазах розвитку рослин наростання маси кореневища було інтенсивнішим у разі використання абсорбенту, незалежно від строків садіння ризом, порівняно з контролем. Спільне використання гранул і гелю абсорбенту забезпечило формування найбільшої маси кореневища.

The analysis of the structure of State Register of Plant Varieties Suitable for Dissemination in Ukraine is presented. The descriptions of new lupine's varieties important for economic use are given. The state of new varieties introduction in production and ways of improving of the soil fertility with a low humus content and the overcoming of crisis in the forage sphere are shown.

Purpose. To study Ukrainian potato market at the current stage of the development and determine its future prospects. Results. The features of Ukrainian potato market were determined. Production is almost fully provided by private households, meeting the needs of the domestic market. Main regions with the highest gross output and production of potatoes were defined. Ukraine is one of the major potato producing countries in the world. Today our country is not a key supplier or importer of this product because of the low export orientation of the industry, its technological backwardness, limited product range and the large number of small producers. Ukraine exports potato mainly to CIS countries, the highest share of potato import comes from the European Union. Now there are only a few large manufacturing companies in the market, which can be classified as industrial. Most potato varieties, officially permitted for dissemination in Ukraine, are classified as table ones and recommended for cultivation in the Forest-Steppe and Polissia zones. Achievements of the industry include the development of such very popular and promising trend as organic potato growing, which area in our country is one of the largest in the world. Conclusions. Potato produced in Ukraine is used for human consumption, animal feeding, planting and processing, its volumes are relatively stable. Large-scale industrial production of potato is not widely practiced because of low wholesale prices and high labor intensity of the cultivation process. During next few years, in view of current trends, production of potato and severe limitations of the domestic market for foreign operations will remain unchanged. A shift in emphasis in the product range – from fresh potato to processed food products should be a prospect for domestic industrial producers to improve their position in Ukraine and abroad.

Abstract Forests are a natural source of airborne bolete spores. The timing of sporulation and its intensity as well as the dispersal of airborne spores and in consequence their concentrations depend in particular on the type of land use determining the availability of matter on which they develop and on meteorological factors. The aim of this study was to perform a spatial and temporal analysis of the occurrence of Boletus-type spores in the warm temperate climate of the Northern Hemisphere. An assumption was made that the spore concentrations depend on the type of land cover and weather conditions. The volumetric method was applied to investigate differences in spore concentrations and using spore traps installed at different heights and at locations with different land cover types. Boletus-type spores occurred in the air at high concentrations in late summer and in the autumn. The season start dates and maximum concentrations did not differ significantly between sites and seasons, but the season intensity varied. Higher spore concentrations were usually found in the region with a larger proportion of green areas, including forests. An analysis of the diurnal cycles showed that within 24 h spore concentration reached high levels twice, which was especially noticeable in ground level monitoring. Air temperature and air humidity were the main weather factors affecting the occurrence of airborne spores. This research indicates that when studying the effects of different factors on the concentration of airborne basidiospores, many environmental elements should be analyzed, including the characteristics of habitats in which basidiomycetes grow. Climate, weather, geobotany, and land use type should be taken into account in analysis and interpretation of aeromycological phenomena.

Purpose. To study biological characteristics of growth and development of middle-early soybean varieties and create a model of phenotype productivity. Methods. Special and gene­ral techniques for studies. Results. Optimal productivity of plants is forming merely at the expense of efficient ratio of all the elements of their structure. It often happens that in case of underdevelopment of one of the structure components yield to some extent can be offset by better development of other elements. Eight indicators were defined which make the largest contribution to the productivity trait of a variety: seed weight per plant, total number of branches, number of nodes per plant, number of pods per plant, number of seeds per plant, number of flowers, plant height, 1000 kernel weight. The first four indicators provided most of the total contribution to a trait of seed weight per plant. Model building was based on hierarchy of productivity traits display in ontogenesis and compliance of their development in organogenesis. The model consists of two modules of traits – resulting and some componental showing phenotypic realization of the genetic formula. It was found that the plant height significantly influence the number of nodes per plant (r = 0,76), and the number of pods per plant (r = 0,43) depends on this trait. In addition, correlation based on the research was obtained between the number of flowers per plant and plant height (r = 0,35), and number of nodes (r = 0,76). It was established that the number of flowers per plant determines the development of pods on the plant so it is quite strongly correlated with this trait (r = 0,99). Conclusions. It was determined that the number of pods per plant and the number of seeds per plant have a very strong correlation (r = 0,96). Besides, such trait as the number of seeds per plant has a strong relationship with the seed weight per plant (r = 0,79).

Purpose. To study biological characteristics of growth and development of middle-early soybean varieties and create a model of phenotype productivity. Methods. Special and gene­ral techniques for studies. Results. Optimal productivity of plants is forming merely at the expense of efficient ratio of all the elements of their structure. It often happens that in case of underdevelopment of one of the structure components yield to some extent can be offset by better development of other elements. Eight indicators were defined which make the largest contribution to the productivity trait of a variety: seed weight per plant, total number of branches, number of nodes per plant, number of pods per plant, number of seeds per plant, number of flowers, plant height, 1000 kernel weight. The first four indicators provided most of the total contribution to a trait of seed weight per plant. Model building was based on hierarchy of productivity traits display in ontogenesis and compliance of their development in organogenesis. The model consists of two modules of traits – resulting and some componental showing phenotypic realization of the genetic formula. It was found that the plant height significantly influence the number of nodes per plant (r = 0,76), and the number of pods per plant (r = 0,43) depends on this trait. In addition, correlation based on the research was obtained between the number of flowers per plant and plant height (r = 0,35), and number of nodes (r = 0,76). It was established that the number of flowers per plant determines the development of pods on the plant so it is quite strongly correlated with this trait (r = 0,99). Conclusions. It was determined that the number of pods per plant and the number of seeds per plant have a very strong correlation (r = 0,96). Besides, such trait as the number of seeds per plant has a strong relationship with the seed weight per plant (r = 0,79).

Purpose. To identify and describe the basic criteria for studying and assessing decorative and economic-and-biological characters of the genus Heuchera L. varieties in the context of introduction. Methods. Introduction procedure, analytical approach, morphological analysis and biometric data evaluation. Results. Aided by the comparative morphological analysis of introduced varieties of the genus Heuchera, significant differences in their characters were revealed, including plant height, height and width of the basal rosette of leaves, generative shoot height. There was a significant variation of such parameters as the number of generative shoots within one plant, the number of flowers on a single generative shoot, flowering abundance. Based on investigation findings, 17 groups of varieties were identified for the dominant color of adaxial surface of the leaf blade and 7 groups – for inflorescence color. According to phenological observations, Heuchera varieties groups were determined and the dates of commencement and duration of plants flowering were registered in the context of introduction. The results of these investigations are the necessary basis for the study and evaluation of this culture assortment, they are important in breeding and landscaping. Conclusions. Based on the results of investigations of morphological features of introduced species of the genus Heuchera, traits and parameters for varieties grouping were defined as well as decorative and economic-and-biological traits that should be evaluated.

Purpose. To identify and describe the basic criteria for studying and assessing decorative and economic-and-biological characters of the genus Heuchera L. varieties in the context of introduction. Methods. Introduction procedure, analytical approach, morphological analysis and biometric data evaluation. Results. Aided by the comparative morphological analysis of introduced varieties of the genus Heuchera, significant differences in their characters were revealed, including plant height, height and width of the basal rosette of leaves, generative shoot height. There was a significant variation of such parameters as the number of generative shoots within one plant, the number of flowers on a single generative shoot, flowering abundance. Based on investigation findings, 17 groups of varieties were identified for the dominant color of adaxial surface of the leaf blade and 7 groups – for inflorescence color. According to phenological observations, Heuchera varieties groups were determined and the dates of commencement and duration of plants flowering were registered in the context of introduction. The results of these investigations are the necessary basis for the study and evaluation of this culture assortment, they are important in breeding and landscaping. Conclusions. Based on the results of investigations of morphological features of introduced species of the genus Heuchera, traits and parameters for varieties grouping were defined as well as decorative and economic-and-biological traits that should be evaluated.

Purpose. To make comprehensive assessment of introduced oat samples of various eco-geographical origin under the conditions of the Forest-Steppe zone of Ukraine for the set of productivity and adaptability indices in order to define the most valuable ones and describe them. Methods. Field study, laboratory analysis, generalization. Results. The authors presented results of the study, evaluation and description of 35 new samples of oats from 5 countries for productivity and adaptability traits during 2011–2015 in Ustymivka Experimental Station for Plant Production to be run by the V. Ya. Yuriev Institute for Plant Production of NAAS. In field and laboratory conditions, the following indicators as yielding, productivity, thousand-kernel weight, early ripening, height of plants and length of panicle, lodging resistance were stu­died. Conclusions. A set of studies of new oat samples under various weather conditions allowed to identify material with increased parameters of economic and biological characters. During studies, it was found that ‘Laima’, ‘Stendskaia Darta’ (Latvia), ‘Borowiak’ (Poland), ‘Faks’ (Belarus) were the high-yielding varieties. Panicles in such oats samples as ‘Cwal’, ‘Borowiak’ (Poland), ‘Iakov’, ‘Mutika 1077’, ‘Mutika 990’, ‘Irtysh 22’, ‘Pokrovskyі 9’ (Russia), ‘Faks’ (Belarus), ‘Stendskaia Darta’, ‘Stendskaia Mara’ (Latvia) contained a large mass of grains (more than 2,5 g), panicle productivity in these samples was rather high both due to increased amount of grains in it and at the expense of thousand-kernel weight. Analysis of the study results showed that introduced oat samples of various eco-geographical origin were adapted to the Southern Forest-Steppe zone and can be recommended as an initial material in breeding for increasing productive and adaptive capacity.

Purpose. To make comprehensive assessment of introduced oat samples of various eco-geographical origin under the conditions of the Forest-Steppe zone of Ukraine for the set of productivity and adaptability indices in order to define the most valuable ones and describe them. Methods. Field study, laboratory analysis, generalization. Results. The authors presented results of the study, evaluation and description of 35 new samples of oats from 5 countries for productivity and adaptability traits during 2011–2015 in Ustymivka Experimental Station for Plant Production to be run by the V. Ya. Yuriev Institute for Plant Production of NAAS. In field and laboratory conditions, the following indicators as yielding, productivity, thousand-kernel weight, early ripening, height of plants and length of panicle, lodging resistance were stu­died. Conclusions. A set of studies of new oat samples under various weather conditions allowed to identify material with increased parameters of economic and biological characters. During studies, it was found that ‘Laima’, ‘Stendskaia Darta’ (Latvia), ‘Borowiak’ (Poland), ‘Faks’ (Belarus) were the high-yielding varieties. Panicles in such oats samples as ‘Cwal’, ‘Borowiak’ (Poland), ‘Iakov’, ‘Mutika 1077’, ‘Mutika 990’, ‘Irtysh 22’, ‘Pokrovskyі 9’ (Russia), ‘Faks’ (Belarus), ‘Stendskaia Darta’, ‘Stendskaia Mara’ (Latvia) contained a large mass of grains (more than 2,5 g), panicle productivity in these samples was rather high both due to increased amount of grains in it and at the expense of thousand-kernel weight. Analysis of the study results showed that introduced oat samples of various eco-geographical origin were adapted to the Southern Forest-Steppe zone and can be recommended as an initial material in breeding for increasing productive and adaptive capacity.

Purpose. To develop a tobacco variety model with optimal inflorescence traits such as size and shape that will allow to increase seed productivity of the crop. Methods. Statistical and mathematical (correlative, regressive) ones. Results. Basic collection consisting of 282 variety samples registered in the National Genetics Center was evaluated, optimal parameters of inflorescence were defined that can provide a high seed yield. During statistical analysis, correlation matrix was developed with the purpose to highlight traits that correlate with inflorescence productivity. According to the results of correlation analysis, a strong relationship between the width and height of inflorescence (r = 0,773±0,038) was established. Somewhat weaker correlation was observed when modeling regressive relation between inflorescence height and width, where regression showed the medium relationship. Regression equation of these traits is as follows: y = 0,5585x + 8,4649. Inflorescence density (r = 0,646), height (r = 0,556) and width (r = 0,527) also had quite a high positive effect on seed productivity. The results of regression analysis pointed to the fact that there were a linear relationship between inflorescence size and seed productivity. Conclusions. Among 282 samples of basic tobacco collection, 29 varieties with high seed productivity was defined which can be used in the breeding process, and ‘Sobolchskyi 15/21’, ‘Ergo 23’, ‘C-11’, ‘Sygarnyi 99’ varieties were selected for large-scale implementation into the production of raw material of cigar type.

Purpose. To develop a tobacco variety model with optimal inflorescence traits such as size and shape that will allow to increase seed productivity of the crop. Methods. Statistical and mathematical (correlative, regressive) ones. Results. Basic collection consisting of 282 variety samples registered in the National Genetics Center was evaluated, optimal parameters of inflorescence were defined that can provide a high seed yield. During statistical analysis, correlation matrix was developed with the purpose to highlight traits that correlate with inflorescence productivity. According to the results of correlation analysis, a strong relationship between the width and height of inflorescence (r = 0,773±0,038) was established. Somewhat weaker correlation was observed when modeling regressive relation between inflorescence height and width, where regression showed the medium relationship. Regression equation of these traits is as follows: y = 0,5585x + 8,4649. Inflorescence density (r = 0,646), height (r = 0,556) and width (r = 0,527) also had quite a high positive effect on seed productivity. The results of regression analysis pointed to the fact that there were a linear relationship between inflorescence size and seed productivity. Conclusions. Among 282 samples of basic tobacco collection, 29 varieties with high seed productivity was defined which can be used in the breeding process, and ‘Sobolchskyi 15/21’, ‘Ergo 23’, ‘C-11’, ‘Sygarnyi 99’ varieties were selected for large-scale implementation into the production of raw material of cigar type.