Purpose. To substantiate the features of the classification of morphobiological and economically valuable indicators of highbush blueberry varieties of Vaccinium corymbosum L. Methods. The studies were carried out during 2012–2019. Research methods: field (visual examination of the manifestation of morphological signs of vegetative and generative organs of blueberry plants), laboratory (determination of the content of vitamin C, total sugar, pectin, carotenes, anthocyanins, flavonoids, total acidity in berries), analytical, comparative, statistical (cluster analysis). Results. Over the years of research, varieties of highbush blueberries were characterized by a stable manifestation of homogeneous morphological traits and economically valuable performance indicators. In particular, the studied varieties are classified according to ripeness groups: very early: ‘Fiolent’; early: ‘Draper’, ‘Huron’, ‘Clockwork’, ‘Cargo’, ‘Laska’; medium: ‘Blue Ribbon’, ‘Top shelf’, ‘ZF08-070’, ‘Mavka’; late: ‘Liberti’, ‘Last Call’ and very late: ‘Aurora’, ‘Overtime’. It was determined that the quantitative morphological traits of highbush blueberry varieties that influenced the formation of plant productivity include such traits as growth vigor, leaf length, leaf width, inflorescences lengthwise, bunch density, fruit size. Economically valuable indicators of suitability of highbush blueberry varieties remained stable within the ripeness group. The highest yield (19.5 t/ha) was provided by the mid-season variety ‘Mavka’ of domestic selection. The yield of berries from the bush of this variety was also high and amounted to 7 kg. The studied performance indicators were low in the variety ‘Blue Ribbon’ – 10.2 t/ha and 2.4 kg, respectively. The minimum and maximum values of the manifestation of characteristics will serve to establish the limiting boundaries of its variation in the next modeling of economically valuable indicators of highbush blueberry varieties. Conclusions. Such morphobiological characteristics of highbush blueberry varieties, as plant growth vigor, leaf length, leaf width, inflorescences lengthwise, bunch density, fruit size are closely related to plant productivity, berry yield per bush, berry weight and yield. Therefore, they can be involved in the development and improvement of the model of suitability indicators of highbush blueberries for distribution in Ukraine.

Purpose. Identifying the features of the seasonal growth rhythm, development of the plants, morphological and biological differences in monoecious introduced and domestic varieties of Cannabis sativa L. in the North-east region of Ukraine. Methods. The research was conducted from 2014 till 2019. The following research methods were employed: field (phenological observations, sampling for laboratory analysis), microscopic (study of the morphological structure of glandular and cystolithic hairs on vegetative and generative organs, determination of the size and density of hair formation), laboratory and analytical (determination of the content of cannabinoid substances by thin layer and gas-liquid chromatography), biomorphological me­thods (analysis of morphological characteristics of plants). Chemical analysis for the content of cannabinoid substan­ces was carried out in the laboratory of the breeding and seed production department of the Institute of Bast Crops of the NAAS of Ukraine (Glukhiv, 2014–2019). The content of neutral substances [cannabinol (CBN), cannabidiol (CBD), tetrahydrocannabinol (THC)] and acids (CBDA, THCA) was determined by using a thin layer chromatography (TLC) and gas-liquid chromatography (GLC) methods. For the study, 11 monoecious varieties of C. sativa: ‘YuSO 1’, ‘YuSO 31’, ‘Hliana’, ‘Viktoriia’, ‘Hlesiia’, ‘Hlukhivskyi 46’, ‘Hlukhivski 51’, ‘Zoloto­niski 15’ and 3 introduced varieties: ‘Fedora 17’, ‘Felina 32’, ‘Futura 77’ (France) which differed among themselves in morphological, biological, genetic, ecological-geographical and economically valuable characteristics were selected. Results. Biological and morphological characteristics of modern monoecious varieties of C. sativa were investigated depending on the ecological and geographical zones of origin, conditions of the growing season and the stage of ontogenesis. The functional interdependence between the formation of specialized excretory structures and the content of cannabinoid substances in plants of different varieties of C. sa­tiva was revealed. The following promising varieties of C. sativa in a ration of ((THC + CBN) ≤ CBD) point the possibility to use them as the source material for creating the medicinal varie­ties of plants with a high content of CBD. Conclusions. Nowadays C. sativa is the main source of phyto material for industrial production of natural CBD. In recent years, high-yielding varieties of C. sativa have been created, which, together with high commercially valuable traits, did not contain psychoactive THC and had an insignificant amount of CBD. The results of the research indicated the features of the seasonal growth rhythm, development of the plants and the morphological and biological features of modern monoecious introduced and domestic varieties of C. sativa in the North-east region of Ukraine. The low correlation between the content of cannabinoid substances and their acids in varieties, which are cha­racterized by the low content of cannabinoid compounds was established. According to the developed own classification (THC + KBN): CBD, varieties with a predominant CBD content ‘Hlukhivskyi 46’, ‘Zolotoniski 15’, ‘Hliana’ which are of significant medicinal value were identified.

Purpose. To analyze the divergence of early maturing source material of corn Zea mays L. in heterosis breeding for the genetic base formation at the State Institution the Institute of Grain Crops of the NAAS of Ukraine. Methods. Field (comprehensive assessment of morphobiological and economically valuable characteristics of the source material and maize hybrids) individual selection, cumulative and recurrent selection, backross and testcrosses bree­ding methods; laboratory; analysis and synthesis; statistical. Results. The results of research on the analysis of the divergence of early maturing corn source material in the conditions of the Steppe of Ukraine has become a developed harmonized working collection of corn breeding samples adapted to the stressful conditions of this region. The gradual cyclical improvement of the lines made it possible to form the core of the genetic diversity of FAO 150–290 early maturing specimens of the southern ecotype, which are competitive in heterosis breeding. The complexity of breeding for early maturity in the steppe conditions is due to the lack of material adapted to the stress factors of the South of Ukraine. The available early maturing lines of the world collection F2, F7, Ер1, Ма21, Ма23, Со125, Со255, См7, PLS61, S72, etc., were distinguished by high cold resistance, good starting plant development, intensive accumulation of dry matter during ripening, but not adapted to the deficiency of moisture in the soil and high summer temperatures. According to the results of the experiment, it was revealed that, in terms of breeding, lines of Lancaster plasma (DK427 and DK633) were the most plastic, due to which a number of new mid-early lines were obtained, for example DK2/427, DK267, DK266/417, DK633/266, DK296, etc., which were included in the registered hybrids. Formation of the genetic base of early maturing maize source material for heterosis breeding and systematization accor­ding to different breeding characteristics provided a balance of samples of alternative components, which will be further used to model heterosis hybrids in the early maturing group. Conclusions. The updated basic collection of lines is represented by the samples of plasma Iodent: DK744SVZM, DK216SVZM, DK4173SVZM, DK235zS, DK257zM, SV, DK365SVZM, DK777ZMSV, DK733-7zM,SV, DK315SVZM; Lancaster: DK296zS,VM, DK633/266zS,VM, DK2965ZSZM, DK2953 ZSZM, DK3023 ZSZM, DK236zS,ZM; Raid (SSS): DK232MV, DK2323MV, DK239MV; Mixed: DK253ZSZM, DK273MV, DK272zS, DK281SV, DK233zM,SV, DK959MV, DK9527 ZSZM, DK247MV, DK2442MV, which is the basis of the genetic diversity of early ripening corn samples included in the State register of plant varie­ties suitable for dissemination in Ukraine.

Purpose. To study the morphological features and determine the biometric indices of leaves of English roses. Methods. Field, morphological, descriptive, biometric. Morphological descriptions were carried out in accordance with the Atlas of morphological features of rose varieties (Rosa L.) (2009) and the Illustrated Guide to Flowering Plant Morphology (2004). Results. The morphological features of the leaves of English rose varieties were determined. Quantitative (length of complex leaf, number of leaf plates, area of leaflet, total leaf area) and qualitative (leaflet shape, leaflet edge shape, leaflet base shape, leaflet tip) were studied. Varieties of English roses that have maximum and minimum values for these indicators were highlighted. Conclusions. The morphological features were revealed and the biometric indicators of the leaves of English roses from the collection of the State Dendrological Park “Alexandria” NAS of Ukraine were determined. The amplitude of variability of morphological characters of the studied varieties was determined. Peculiarities of the morphological structure and biometric parameters of leaves of English rose varieties can be diagnostic signs for determining varieties within the boundaries of the species. Plants with increased photosynthetic productivity of the leaf apparatus, which is characteristic of the ‘James Galway’ and ‘A Shropshire Lad’ varieties, have an advantage in landscaping.

Purpose. To determine the patterns of influence of gro­wing factors on the economically valuable characteristics of new soybean varieties. Methods. Field, biochemical methods, analysis of variance. Results. The rates of the influence of the growing zone, the conditions of the growing season of the year and the soybean variety on the yield, weight of 1000 seeds, the content of crude protein and oil, and protein and oil collection were determined. The greatest influence on the yield of the studied varieties had a growing zone – 55%. On average the maximum yield was obtained in Forest-steppe zone 2.48–3.58 t/ha, the lowest – in Steppe zone (1.33–1.89 t/ha) for 2017–2018. In the same period the weight of 1000 seeds on average was 125.1–169.9 g in the Steppe zone, in Forest-Steppe zone it was 130.2–207.8 g and 143.9–188.0 g in Fo­rrest zone. According to the results of analysis of variance, it was determined that the growing zone has the greatest influence on weight of 1000 seeds – 31%, variety – 21% and conditions of the growing season of the year – 13%. The main characteristics of soybean quality are the content of crude protein and oil in seeds. The highest level of crude protein was observed in soybean variety in Forest-Steppe zone – 37.5–44.0%. In Forrest zone, the crude protein content was 34.4–41.7%, in the Steppe zone 35.4–40.1%. The maximum level of this characteristic was observed in variety ‘NS Diyana’ – 44.0% in Forest-Steppe zone, in Forrest zone – in the variety ‘Alexa’ 41.7%, in Steppe zone – in variety ‘NS Diyana’ 40.1%. Thus, the growing zone (31%) and variety (25%) had the greatest influence on the content of crude protein; the interaction of factors (variety and growing zone) affected 17%. The average oil content for 2017‑2018 ranges from 19.8 to 24.2%. High oil content was noted in ‘Adsoy’ variety in Forrest and Forest-Steppe zones, 24.2 and 22.6%, respectively, and ‘Azimut’ – 23.8% in Steppe zone. The results of the analysis of variance showed that the growing zone to a greater extent affected the oil content in soybean seeds by 25%, variety – 21%, and the interaction of factors of the variety and gro­wing zone by 21%. Conclusions. According to the results of multifactor analysis of variance, it was determined that the growing zone had the greatest influence on the studied parameters. It was found that the rate of the influence of gro­wing zone of soybean varieties is 25–55%, depending on the studied characteristic. It was determined that the influence of the variety was 4–25%, the conditions of the growing season affected by 1–26%.

Purpose. To study the effect of different sowing periods, seed sowing rates onto morphological and crop capacity indicators of oilseeds flax of Ukrainian varieties: ‘Orfei’, ‘Svito­zir’ and ‘Vodohrai’. Methods. The research was conducted in 2018–2019 in the branch of Ukrainian institute of plant varieties expertise in Khmelnytsky oblast state centre of plant varieties expertise, village Trebukhivtsi, Letychiv region, Khmelnytsky oblast. The following factors are studied: sowing period (15, 20, 25 April); seed sowing rates in million items per hectare (4, 6, 8); varieties of oilseed flax from The Institute of oilseed plants of National Academy of Agricultural Sciences of Ukraine: ‘Orfei’, ‘Svitozir’ and ‘Vodo­hrai’. Embedding experiments, material estimation, plants, harvest and seeds analysis are done in accordance with the “The method for the qualification examination of plant varieties for suitability for distribution in Ukraine”. Results. The credible difference between the variants according to the rate of sowing the seed and the terms of so­wing was defined. The estimation of the oilseed flax varieties according to the morphological and harvesting indicators was done. The variety of oilseed flaxseed ‘Svitlozar’ demonstrated higher harvest rate and morphological indicators in a so­wing period of 20–25 April and the sowing rate 6 and 8 million seed per1 hectare. It was also revealed, that regardless of a variety, the sowing rate of 6 million seeds per one hec­tare is the best of all. A better number of capsules, the seeds in the capsules and the weight of the seeds in the plant was formed by the variety ‘Svitlozir’ compared to the varieties ‘Orfei’ and ‘Vodohrai’. With early sowing period, the smal­-lest values of morphological and yield indices were observed in the varieties of flaxseed, irrespective of the variety and norms of seeding. Conclusions. For more full realization of the genetic potential of the varieties of oilseed flax according to the morphological and harvest indicators in the conditions of Western Forest-Steppe the sawing rate must be 8 million seeds per one hectare, and the sawing period of 20–25 April. The variety ‘Svitlozir’ is characterized by its higher crop capacity and morphological indicators

Purpose. Morphological and organoleptic evaluation of oyster mushroom strains for selection of highly productive cultivars assortment with valuable consumer properties for winter and summer cultivation and suitability for sale in fresh or processed form were investigated. Methods. The scheme of the experiment included six strains of oyster mushrooms belonging to two species: Pleurotus ostreatus (5 strains: 2301, Z, 2316, 2456, 431) and P. pulmonarius (2314). Laboratory, laboratory-industrial and statistical methods are used. Results. The dynamics of agrochemical parameters of substrates obtained by the method of aerobic fermentation in the high layer proved their optimality according to the main criteria and compliance to regulatory documentation. The biological efficiency of the strains was in the range of 40–78.9%. The highest weight of clusters was found in the “summer” strain 431 (430.7 g). The highest weight of the fruiting body was determined for the strain 2301 (15.2 g), the lowest – for the 2456 (3.3 g). Conclusions. The values of biological efficiency of strains was determined. The highest average values for the first flush of fruiting had strains 2316 (78.9%) from the “winter” group (A) and 431 (78.4%) from the “summer” group  (B). According to the results of statistical analysis, significant differences were revealed between the studied strains in the main morphological indicators of clusters. It was found that the mass of clusters of «winter» cultivars is much less dependent on the strain type (220.8–273.4 g) than that of «summer» cultivars (83.4–430.7 g). The index of the asymmetry coefficient of the cluster, which can be useful for calculating the required container sizes was proposed. It was determined that the morphological features of fruiting bodies had significant differences in all studied parameters.  In particular, the A group strains differed in size and weight. It was proposed the index of weight loss of the crop coefficient, which shows the ratio between the cap and stipe of the fruiting body and make it possible to predict the amount of mushroom raw material that will be sold in the form of caps, and the amount of raw material that can be processed into minced mushroom, powder and others. The best coefficient was obtained for the fruiting bodies of strain 2314 (0.87), and the worst – for 2456 (0.59), which, accordingly, is not recommended for sale by individual fruiting bodies. It was found that the fruiting bodies of high-yielding strains 2316 and 431 had a number of organoleptic defects.

Purpose. To analyse the world experience and current trends in protection of new apples varieties and plant breeders’ rights. Results. It takes up to 20 years to developed a new variety of apple trees from crossing, in addition to considerable material resources; another 5–10 years are spent on its introduction into a broad culture. After the licensing agreement, the cultivar owner receives royalties for each tree sold, but such a scheme presents risks for both cultivar owners and apple producers. Most of the time allotted for the protection of the variety may be exhausted before it becomes popular with consumers. To overcome the negative traits inherent in “open cultivars”, new marketing mechanisms using “managed” or club cultivars are used. The cultivar owner obtains a USPP or PBR in a producing country. He usually also registers one or more trademarks in each of countries where fruit will be sold. Licensing agreements for tree propagation and fruit production are usually licensed to one or a few producers or marketers in a production territory along with rights to use a trademark for sales in one or more countries. In return, the cultivar owner receives an exclusivity payment, a royalty from each apple tree propagated, and a proportion of the fruit sale. The producer agrees to milestones for orchard establishment and fruit production and maintenance of quality standards. The advantage for growers is the ability to raise prices by limi­ting supply and the benefits of promoting apples in the market. Retailers are generally interested in registered varieties due to the higher selling prices and the potential for exclusivity of branded varieties. Due to the large volume of supply of many varieties, manufacturers consider new club varieties necessary for maintaining profitability. It is projected that in the near future the share of club varieties may increase from the current 5% to 15–20%. Conclusions. The licensing of the trademark provides a marketer to build a brand that can contribute to a lengthy and indefinite exclusivity period of the cultivar with proper management of intellectual property and apple production and quality. Income on the use of trademark in fruit sales can have sustained and potentially larger to cultivar owner. Only apples of certain quality standards are sold under brand names at higher prices, increasing profitability and providing a more stable annual income for the producer. The efficiency of the brand system means that in the future, new apple varieties will be launched exclusively under their own brand, and the introduction of new varieties will bring greater benefits to producers and consumers.

Мета. Проаналізувати світовий досвід і сучасні тенденції охорони нових сортів яблук та прав селекціонера. Результати. На створення нового сорту яблуні шляхом схрещування, окрім значних матеріальних ресурсів, витрачається до 20 років; ще 5–10 років йде на його впровадження в широку культуру. Власник сорту після укладання ліцензійної угоди отримує роялті за кожний проданий саджанець, але така схема є ризикованою як для власників сортів, так і для виробників садовини. Більша частина часу, що відведена для охорони сорту, може бути вичерпаною ще до того, як він набуде популярності в споживачів. Для подолання негативних рис, притаманних «відкритим» сортам, застосовуються нові маркетингові механізми з використанням «закритих», або клубних сортів. Власник сорту отримує патент США або охорону прав селекціонера в країні виробництва та, зазвичай, також реєструє одну або декілька торговельних марок для збуту в кожній країні, де садовина буде продаватися. Ліцензійні угоди на вирощування садивного матеріалу і виробництво плодів як правило укладаються для одного або декількох виробників чи продавців у країні разом з правами використовувати торговельну марку для продажів в одній чи декількох країнах. У свою чергу власник сорту отримує ексклюзивні платежі – роялті з кожного проданого саджанця і відсоток від продажу плодів. Виробник погоджується з етапами створення саду і виробництва плодів та підтриманням стандартів якості. Перевага для виробників полягає в можливості підвищення ціни за рахунок обмеження пропозиції і переваг у просуванні яблук на ринку. Роздрібні торговці, як правило, зацікавлені в зареєстрованих сортах завдяки вищим цінам реалізації та потенціалу ексклюзивності брендових сортів. За великих обсягів постачання багатьох сортів виробники вважають нові клубні сорти необхідними для підтримання прибутковості. Прогнозують, що найближчим часом частка клубних сортів може збільшитися із теперішніх 5 до 15–20%. Висновки. Ліцензування торговельної марки стимулює маркетолога розвивати бренд, який може сприяти тривалому і невизначеному періоду винятковості сорту з розширенням можливостей управління інтелектуальною власністю, виробництвом садовини та її якістю. Дохід власника сорту внаслідок використання торговельної марки під час продажу плодів може бути тривалішим і більшим. Яблука, що відповідають стандартам якості, продають під брендовими назвами за вищими цінами, збільшуючи прибуток і забезпечуючи стабільніший річний дохід для виробника. Ефективність системи брендів означає, що в майбутньому нові сорти яблук виходитимуть у світ виключно під власним брендом, а впровадження нових сортів надасть більших переваг виробникам та споживачам садовини. | Цель. Проанализировать мировой опыт и современные тенденции защиты новых сортов яблок и охраны прав селекционера. Результаты. На создание нового сорта яблони путем скрещивания, кроме значительных материальных ресурсов, затрачивается до 20 лет; еще 5–10 лет уходит на его внедрение в широкую культуру. Собственник сорта после заключения лицензионного соглашения получает роялти за каждый проданный саженец, но такая схема является рискованной как для владельцев сортов, так и для производителей яблок. Большая часть времени, отведенного для охраны сорта, может быть исчерпана до того, как он приобретет популярность у потребителей. Для преодоления отрицательных черт, присущих «открытым» сортам, применяются новые маркетинговые механизмы с использованием «закрытых», или клубных сортов. Собственник сорта получает патент США или охрану прав селекционера в стране производства и обычно также регистрирует одну или несколько торговых марок для сбыта в каждой стране, где яблоки будут продаваться. Лицензионные соглашения на выращивание посадочного материала и производство плодов обычно заключают для одного или нескольких производителей или продавцов в стране вместе с правами на использование торговой марки для продаж в одной или нескольких странах. В свою очередь собственник сорта получает эксклюзивные платежи – роялти с каждого проданного саженца и процент от продажи плодов. Производитель соглашается с этапами создания сада, производства плодов и поддержанием стандартов качества. Преимущество для производителей заключается в возможности повышения цены за счет ограничения предложения и преимуществ в продвижении яблок на рынке. Розничные торговцы, как правило, заинтересованы в зарегистрированных сортах благодаря высоким ценам реализации и потенциалу эксклюзивности брендовых сортов. При больших объемах поставок многих сортов производители считают новые клубные сорта необходимыми для поддержания прибыльности. Прогнозируется, что в ближайшее время доля клубных сортов может увеличиться по сравнению с нынешними от 5 до 15–20%. Выводы. Лицензирование торговой марки стимулирует маркетолога развить бренд, который может благоприятствовать длительному и неопределенно длительному периоду исключительности сорта с расширением возможностей управления интеллектуальной собственностью, производством яблок и их качеством. Доход собственника сорта вследствие использования торговой марки во время продажи плодов, может быть более длительным и бóльшим. Яблоки, соответствующие стандартам качества, продают под брендовыми названиями по более высоким ценам, увеличивая доходность и обеспечивая стабильный годовой доход для производителя. Эффективность системы брендов означает, что в будущем новые сорта яблок будут выходить в свет исключительно под собственным брендом, а внедрение новых сортов даст больше преимуществ производителям и потребителям яблок. | Purpose. To analyse the world experience and current trends in protection of new apples varieties and plant breeders’ rights.Results. It takes up to 20 years to developed a new variety of apple trees from crossing, in addition to considerable material resources; another 5–10 years are spent on its introduction into a broad culture. After the licensing agreement, the cultivar owner receives royalties for each tree sold, but such a scheme presents risks for both cultivar owners and apple producers. Most of the time allotted for the protection of the variety may be exhausted before it becomes popular with consumers. To overcome the negative traits inherent in “open cultivars”, new marketing mechanisms using “managed” or club cultivars are used. The cultivar owner obtains a USPP or PBR in a producing country. He usually also registers one or more trademarks in each of countries where fruit will be sold. Licensing agreements for tree propagation and fruit production are usually licensed to one or a few producers or marketers in a production territory along with rights to use a trademark for sales in one or more countries. In return, the cultivar owner receives an exclusivity payment, a royalty from each apple tree propagated, and a proportion of the fruit sale. The producer agrees to milestones for orchard establishment and fruit production and maintenance of quality standards. The advantage for growers is the ability to raise prices by limi­ting supply and the benefits of promoting apples in the market. Retailers are generally interested in registered varieties due to the higher selling prices and the potential for exclusivity of branded varieties. Due to the large volume of supply of many varieties, manufacturers consider new club varieties necessary for maintaining profitability. It is projected that in the near future the share of club varieties may increase from the current 5% to 15–20%.Conclusions. The licensing of the trademark provides a marketer to build a brand that can contribute to a lengthy and indefinite exclusivity period of the cultivar with proper management of intellectual property and apple production and quality. Income on the use of trademark in fruit sales can have sustained and potentially larger to cultivar owner. Only apples of certain quality standards are sold under brand names at higher prices, increasing profitability and providing a more stable annual income for the producer. The efficiency of the brand system means that in the future, new apple varieties will be launched exclusively under their own brand, and the introduction of new varieties will bring greater benefits to producers and consumers.

Purpose. To study the morphological features and determine the biometric indices of leaves of English roses. Methods. Field, morphological, descriptive, biometric. Morphological descriptions were carried out in accordance with the Atlas of morphological features of rose varieties (Rosa L.) (2009) and the Illustrated Guide to Flowering Plant Morphology (2004). Results. The morphological features of the leaves of English rose varieties were determined. Quantitative (length of complex leaf, number of leaf plates, area of leaflet, total leaf area) and qualitative (leaflet shape, leaflet edge shape, leaflet base shape, leaflet tip) were studied. Varieties of English roses that have maximum and minimum values for these indicators were highlighted. Conclusions. The morphological features were revealed and the biometric indicators of the leaves of English roses from the collection of the State Dendrological Park “Alexandria” NAS of Ukraine were determined. The amplitude of variability of morphological characters of the studied varieties was determined. Peculiarities of the morphological structure and biometric parameters of leaves of English rose varieties can be diagnostic signs for determining varieties within the boundaries of the species. Plants with increased photosynthetic productivity of the leaf apparatus, which is characteristic of the ‘James Galway’ and ‘A Shropshire Lad’ varieties, have an advantage in landscaping. | Мета. Вивчити морфологічні особливості та визначити біометричні показники листків англійських троянд.Методи. Польовий, морфолого-описовий, біометричний. Опис морфологічних ознак виконували згідно з «Атласом морфологічних ознак сортів троянди (Rosa L.)» (2009) та «Ілюстрованим довідником з морфології квіткових рослин» (2009).Результати. Визначено морфологічні особливості листків сортів англійських троянд. Вивчено кількісні (довжина складного листка, кількість листкових пластинок, площа листкової пластинки, загальна площа листка) та якісні (форма листкової пластинки, форма краю листкової пластинки, форма основи листкової пластинки, форма верхівки листкової пластинки) показники. Виділено сорти англійських троянд, які мають максимальні та мінімальні значення за цими показниками.Висновки. Виявлено морфологічні особливості та визначено біометричні показники листків англійських троянд з колекції Державного дендрологічного парку «Олександрія» НАН України. Встановлено амплітуду мінливості морфологічних ознак досліджуваних сортів. Особливості морфологічної будови та біометричних параметрів листків рослин сортів англійських троянд можуть бути діагностичними ознаками для визначення сортів у межах виду. В озелененні переважають рослини із збільшеною фотосинтетичною продуктивністю листкового апарату, яка властива сортам ‘James Galway’ та ‘A Shropshire Lad’. | Цель. Изучить морфологические особенности и определить биометрические показатели листков английских роз. Методы. Полевой, морфолого-описательный, биомет­рический. Описание морфологических признаков проводили в соответствии с «Атласом морфологічних ознак сортів троянди (Rosa L.) (2009) и «Ілюстрованим довідником з морфології квіткових рослин» (2004). Результаты. Определены морфологические особенности листьев сортов английских роз. Изучены количественные (длина сложного листа, количество листовых пластинок, площадь листовой пластинки, общая площадь листа) и качественные (форма листовой пластинки, форма края листовой пластинки, форма основания листовой пластинки, форма верхушки листовой пластинки) показатели. Выделены сорта английских роз, которые имеют максимальные и минимальные значения по этим показателям. Выводы. Установлены морфологические особенности и определены биометрические показатели листов английских роз из коллекции Государственного дендрологического парка «Александрия» НАН Украины. Определена амплитуда изменчивости морфологических признаков исследуемых сортов. Особенности морфологического строения и биометрических параметров листов растений сортов английских роз могут быть диагностическими признаками для определения сортов в границах вида. Для озеленения преимущество имеют растения с увеличенной фотосинтетической продуктивностью листового аппарата, что является характерным для сортов ‘James Galway’ и ‘A Shropshire Lad’.