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 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 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’.

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. Determination of optimum dozes of foliar fee­ding for each cultivar that will provide the highest output of standard rootstocks. Methods. Field, analytical and statistical ones. Results. The author presents the results of study of the hazelnut plant foliar feeding in the mother plantation for vegetative propagation with applying different carba­mide concentration combined with 0.1% potassium sulfate (1.50.4 m) in case of horizontal method of growing. Biometric indices of hazelnut layers were analyzed; the influence of each factor on their height and diameter was determined. The rootstocks output per 1 linear meter for each cultivar as well as optimum foliar feeding doze was defined (0.5% carbamide with 0.1% potassium sulfate). Conclusions. The highest output of standard rootstocks in the mother plantation for horizontal vegetative propagation was achieved when applying the foliar feeding with 0.5% carbamide combined with 0.1% potassium sulfate, particularly (thousand rootstocks per 1 ha) for the cultivars: ‘Sviatkovyi’ – 66.7, ‘Dolynskyi’ – 62.1 and ‘Darunok Yunnatam’ – 50.7. For ‘Koronchatyi’ cultivar, the use of 3% carbamide was the most efficient.

Purpose. Determination of optimum dozes of foliar fee­ding for each cultivar that will provide the highest output of standard rootstocks. Methods. Field, analytical and statistical ones. Results. The author presents the results of study of the hazelnut plant foliar feeding in the mother plantation for vegetative propagation with applying different carba­mide concentration combined with 0.1% potassium sulfate (1.50.4 m) in case of horizontal method of growing. Biometric indices of hazelnut layers were analyzed; the influence of each factor on their height and diameter was determined. The rootstocks output per 1 linear meter for each cultivar as well as optimum foliar feeding doze was defined (0.5% carbamide with 0.1% potassium sulfate). Conclusions. The highest output of standard rootstocks in the mother plantation for horizontal vegetative propagation was achieved when applying the foliar feeding with 0.5% carbamide combined with 0.1% potassium sulfate, particularly (thousand rootstocks per 1 ha) for the cultivars: ‘Sviatkovyi’ – 66.7, ‘Dolynskyi’ – 62.1 and ‘Darunok Yunnatam’ – 50.7. For ‘Koronchatyi’ cultivar, the use of 3% carbamide was the most efficient.

Purpose. To study the economic and biological characteristics and to reveal the genetic potential of various hybrids of Chinese cabbage depending on the climatic zone of cultivation. Methods. In the experiment, hybrids of Chinese cabbage ‘Pioner F1’ (control), ‘Villi F1’, ‘Manoko F1’, ‘Orient Star F1’, ‘Vitimo F1’, ‘Sprinkin F1’, ‘Summer Highland F1’, ‘Suprin F1’, and ‘Richi F1’ were evaluated. The experiment was laid out in a randomized block design with four replications with a single plot area of 21 m2. The container seedlings (40 days old) were planted in the middle of April according to the scheme 70 cm by 25 cm. Results. Having been planted at the same time, seed germination over the studied hybrids was not simultaneous. The first sprouted seeds (4 days after seeding) belonged to hybrids ‘Villi F1’, ‘Manoko F1’, ‘Orient Star F1’, and‘Summer Highland F1’. Seeds of the other hybrids started active germination on the 5–6 days after seeding. The highest yield of the cabbage heads was obtained from hybrids ‘Villi F1’ (31.7 t/ha) and ‘Sprinkin F1’ (28.7 t/ha), which was 10.0 and 7.0 t/ha more than in the control variant. The yield of ‘Summer Highland F1’ was 24.9 t/ha and ‘Suprin F1’ 24.6 t/ha. Under the conditions of unstable soil moisture, hybrids ‘Villi F1’and ‘Sprinkin F1’ appeared the most productive and ensured yield increase of 10.0 t/ha and 7.0 t/ha, respectively, compared to the control; and crop commercial quality was high. The highest percentage of dry matter (DM) content was in ‘Summer Highland F1’ (6.2%) followed by ‘Sprinkin F1’ (5.9%), which was 1.1% and 0.8% more than in the control. There was no significant difference between the values of the total sugars content over the variants. They ranged between 1.7 and 2.1%, which was similar to the control values. The content of nitrates in the cabbage heads of the studied Chinese cabbage hybrids was within the tolerance limit and amounted to 600 mg/kg (raw mass). Conclusions. Phenological observations of plant development and their biometric indices, depending on the varietal characteristics, indicate that under the conditions of unstable soil moisture, hybrids ‘Villi F1’ and ‘Sprinkin F1’ were more yielding and ensured yield increase of 10.0 t/ha and 7.0 t/ha, respectively, compared to the control. The crop commercial quality was high. The long growing season of ‘Richi F1’ (93 days) did not affect the crop quality and yield and demonstrated the lowest productivity compared to the control and the other experiment variants.

Purpose. To study the economic and biological characteristics and to reveal the genetic potential of various hybrids of Chinese cabbage depending on the climatic zone of cultivation. Methods. In the experiment, hybrids of Chinese cabbage ‘Pioner F1’ (control), ‘Villi F1’, ‘Manoko F1’, ‘Orient Star F1’, ‘Vitimo F1’, ‘Sprinkin F1’, ‘Summer Highland F1’, ‘Suprin F1’, and ‘Richi F1’ were evaluated. The experiment was laid out in a randomized block design with four replications with a single plot area of 21 m2. The container seedlings (40 days old) were planted in the middle of April according to the scheme 70 cm by 25 cm. Results. Having been planted at the same time, seed germination over the studied hybrids was not simultaneous. The first sprouted seeds (4 days after seeding) belonged to hybrids ‘Villi F1’, ‘Manoko F1’, ‘Orient Star F1’, and‘Summer Highland F1’. Seeds of the other hybrids started active germination on the 5–6 days after seeding. The highest yield of the cabbage heads was obtained from hybrids ‘Villi F1’ (31.7 t/ha) and ‘Sprinkin F1’ (28.7 t/ha), which was 10.0 and 7.0 t/ha more than in the control variant. The yield of ‘Summer Highland F1’ was 24.9 t/ha and ‘Suprin F1’ 24.6 t/ha. Under the conditions of unstable soil moisture, hybrids ‘Villi F1’and ‘Sprinkin F1’ appeared the most productive and ensured yield increase of 10.0 t/ha and 7.0 t/ha, respectively, compared to the control; and crop commercial quality was high. The highest percentage of dry matter (DM) content was in ‘Summer Highland F1’ (6.2%) followed by ‘Sprinkin F1’ (5.9%), which was 1.1% and 0.8% more than in the control. There was no significant difference between the values of the total sugars content over the variants. They ranged between 1.7 and 2.1%, which was similar to the control values. The content of nitrates in the cabbage heads of the studied Chinese cabbage hybrids was within the tolerance limit and amounted to 600 mg/kg (raw mass). Conclusions. Phenological observations of plant development and their biometric indices, depending on the varietal characteristics, indicate that under the conditions of unstable soil moisture, hybrids ‘Villi F1’ and ‘Sprinkin F1’ were more yielding and ensured yield increase of 10.0 t/ha and 7.0 t/ha, respectively, compared to the control. The crop commercial quality was high. The long growing season of ‘Richi F1’ (93 days) did not affect the crop quality and yield and demonstrated the lowest productivity compared to the control and the other experiment variants.

Цель. Исследовать хозяйственно-биологические особенности и раскрыть генетический потенциал различных гибридов капусты пекинской в зависимости от климатической зоны выращивания. Методы. Вариантами опыта были гибриды капусты пекинской ‘Pioner F1’ (контроль), ‘Vili F1’, ‘Manoko F1’, ‘Orient Star F1’, ‘Vitimo F1’, ‘Sprinkin F1’, ‘Summer Highland F1’, ‘Suprin F1’, ‘Richi F1’. Площадь учетного участка 21 м2. Опыт закладывался в четырех повторениях, исследуемые варианты размещали методом рендомизированных блоков. Кассетную рассаду в возрасте 40 суток высаживали во второй декаде апреля по схеме 70 × 25 см. Результаты. В один срок посева у гибридов всходы появлялись не одновременно и первые отмечены у гибридов ‘Vili F1’, ‘Manoko F1’, ‘Orient Star F1’ и ‘Summer Highland F1’ – на 4 сутки после посева, а в остальных – массовые всходы наблюдались несколько позже, на 5–6 сутки после посева. Самый высокий товарный урожай головок получили у гибридов ‘Vili F1’ (31,7 т/га) и ‘Sprinkin F1’ (28,7 т/га), что на 10,0 и 7,0 т/га больше, чем в контроле. Существенно ниже была урожайность у гибридов ‘Summer Highland F1’ – 24,9 и ‘Suprin F1’ – 24,6 т/га. В условиях неустойчивого увлажнения более урожайными были гиб­риды ‘Vili F1’ и ‘Sprinkin F1’, которые обеспечили прирост урожая к контролю 10,0 и 7,0 т/га, а продукция имела высокое товарное качество. Самый высокий процент сухих растворимых веществ установлен в головках гибридов ‘Summer Highland F1’ (6,2%) и ‘Sprinkin F1’ (5,9%), что на 1,1 и 0,8% больше контроля. По сумме сахаров не отмечено существенной разницы между вариантами, данный показатель был на уровне контроля (1,7–2,1%). Содержание нитратов в головках исследуемых гибридов капусты пекинской было в пределах допустимой нормы 600 мг/кг сырой массы. Выводы. Фенологические наблюдения за развитием растений и их биометрические показатели в зависимости от сортовых особенностей указывают, что в условиях неустойчивого увлажнения более урожайными были гибриды ‘Vili F1’ и ‘Sprinkin F1’, которые обеспечили прирост урожая к контролю 10,0 и 7,0 т/га, а продукция была высокого товарного качества. Длительный период вегетации у гибрида ‘Richi F1’ – 93 суток не повлиял на качество и урожайность культуры и обеспечил низкие показатели относительно контрольного и исследуемых вариантов. | Мета. Дослідити господарсько-біологічні особливості та розкрити генетичний потенціал різних гібридів капусти пекінської залежно від кліматичної зони вирощування.Методи. Варіантами досліду були гібриди капусти пекінської ‘Pioner F1’ (контроль), ‘Vili F1’, ‘Manoko F1’, ‘Orient Star F1’, ‘Vitimo F1’, ‘Sprinkin F1’, ‘Summer Highland F1’, ‘Suprin F1’, ‘Richi F1’. Площа облікової ділянки 21 м2. Дослід закладався в чотирьох повтореннях, досліджувані варіанти розміщували методом рендомізованих блоків. Касетну розсаду віком 40 діб висаджували в другій декаді квітня за схемою 70 × 25 см.Результати. За одного строку сівби у гібридів сходи з’являлись неодночасно і перші відмічено у гібридів ‘Vili F1’, ‘Manoko F1’, ‘Orient Star F1’та ‘Summer Highland F1’ – на 4 добу після сівби, а у решти – масові сходи спостерігали дещо пізніше, на 5–6 добу після сівби. Найвищий товарний врожай головок одержали у гібридів ‘Vili F1’ (31,7 т/га) та ‘Sprinkin F1’ (28,7 т/га), що на 10,0 і 7,0 т/га більше, ніж у контролі. Істотно нижчою була врожайність у гібридів ‘Summer Highland F1’ – 24,9 і ‘Suprin F1’ – 24,6 т/га. В умовах нестійкого зволоження врожайнішими були гібриди ‘Vili F1’та ‘Sprinkin F1’, які забезпечили приріст урожаю до контролю 10,0 і 7,0 т/га, а продукція була високої товарної якості. Найвищий відсоток сухих розчинних речовин був у головках гібридів ‘Summer Highland F1’ (6,2%) і ‘Sprinkin F1’ (5,9%), що на 1,1 і 0,8% більше за контроль. За сумою цукрів не відмічено істотної різниці між варіантами, даний показник був на рівні контролю (1,7–2,1%). Уміст нітратів у головках досліджуваних гібридів капусти пекінської був у межах допустимої норми – 600 мг/кг сирої маси.Висновки. Фенологічні спостереження за розвитком рослин та їхні біометричні показники залежно від сортових особливостей вказують, що в умовах нестійкого зволоження врожайнішими були гібриди ‘Vili F1’та ‘Sprinkin F1’, які забезпечили приріст урожаю до контролю 10,0 і 7,0 т/га, а продукція була високої товарної якості. Тривалий період вегетації у гібриду ‘Richi F1’– 93 доби, не вплинув на якість і врожайність та забезпечив найнижчі показники відносно контрольного і досліджуваних варіантів. | Purpose. To study the economic and biological characteristics and to reveal the genetic potential of various hybrids of Chinese cabbage depending on the climatic zone of cultivation.Methods. In the experiment, hybrids of Chinese cabbage ‘Pioner F1’ (control), ‘Villi F1’, ‘Manoko F1’, ‘Orient Star F1’, ‘Vitimo F1’, ‘Sprinkin F1’, ‘Summer Highland F1’, ‘Suprin F1’, and ‘Richi F1’ were evaluated. The experiment was laid out in a randomized block design with four replications with a single plot area of 21 m2. The container seedlings (40 days old) were planted in the middle of April according to the scheme 70 cm by 25 cm.Results. Having been planted at the same time, seed germination over the studied hybrids was not simultaneous. The first sprouted seeds (4 days after seeding) belonged to hybrids ‘Villi F1’, ‘Manoko F1’, ‘Orient Star F1’, and‘Summer Highland F1’. Seeds of the other hybrids started active germination on the 5–6 days after seeding. The highest yield of the cabbage heads was obtained from hybrids ‘Villi F1’ (31.7 t/ha) and ‘Sprinkin F1’ (28.7 t/ha), which was 10.0 and 7.0 t/ha more than in the control variant. The yield of ‘Summer Highland F1’ was 24.9 t/ha and ‘Suprin F1’ 24.6 t/ha. Under the conditions of unstable soil moisture, hybrids ‘Villi F1’and ‘Sprinkin F1’ appeared the most productive and ensured yield increase of 10.0 t/ha and 7.0 t/ha, respectively, compared to the control; and crop commercial quality was high. The highest percentage of dry matter (DM) content was in ‘Summer Highland F1’ (6.2%) followed by ‘Sprinkin F1’ (5.9%), which was 1.1% and 0.8% more than in the control. There was no significant difference between the values of the total sugars content over the variants. They ranged between 1.7 and 2.1%, which was similar to the control values. The content of nitrates in the cabbage heads of the studied Chinese cabbage hybrids was within the tolerance limit and amounted to 600 mg/kg (raw mass).Conclusions. Phenological observations of plant development and their biometric indices, depending on the varietal characteristics, indicate that under the conditions of unstable soil moisture, hybrids ‘Villi F1’ and ‘Sprinkin F1’ were more yielding and ensured yield increase of 10.0 t/ha and 7.0 t/ha, respectively, compared to the control. The crop commercial quality was high. The long growing season of ‘Richi F1’ (93 days) did not affect the crop quality and yield and demonstrated the lowest productivity compared to the control and the other experiment variants.

Purpose. To investigate the variability of plant biometrics of cutting lettuce (Lactuca sativa L.) varieties depending on the concentration of microfertilizer Avatar-1. Methods. Field study, biometric technique, comparative approach, statistical evaluation, generalization. Results. Dependence of the plant height, the diameter of the leaf rosette, the number of leaves per plant, the leaf area of plants on the concentration of microfertilizer Avatar-1 was defined. Investigations of cutting lettuce ‘Afitsyon’ and ‘Concord’ varieties by Dutch breeding were conducted in 2016–2017 in the collection sites of the department of vegetable growing in the scientific-experimental field “Fruit and vegetable garden” of the National University of Life and Environmental Sciences of Ukraine. In order to determine dependence of plant biometrics of cutting lettuce varieties on the concentration of complex microfertilizer Avatar-1, the following scheme was used for the both varieties: variant 1 – water (control); variant 2 – 0,10% solution; variant 3 – 0,25% solution; variant 4 – 0,50% solution. Plants were treated with microfertilizer three times during the vegetative period. Alterations of plant biometrics of cutting lettuce ‘Afitsyon’ and ‘Concord’ varieties depending on the concentration of complex microfertilizer Avatar-1 was studied. Conclusions. It was found that in case of three-time plant treatment with complex microfertilizer Avatar-1 at the time of harvesting, the best plant biometrics was registered in variant 3 (concentration 0,25%) for the both ‘Afitsyon’ and ‘Concord’ varie­ties of cutting lettuce. The height of plants of the cutting lettuce in ‘Afitsyon’ variety exceeded this figure in ‘Concord variety by 1,1–1,4 cm. The concentration of microfertilizer had no significant effect on the diameter of the leaf rosette of ‘Concord’ variety (25,1–25,9 см). The diame­ter of the leaf rosette of ‘Afitsyon’ variety was 26,0–28,7 cm. In cutting lettuce, the largest leaf area per plant was registered in ‘Afi­tsyon’ variety (3516.5 cm2/plant) in case of plants treatment with 0,25% solution of complex microfertilizer Avatar-1 that exceeded this figure in ‘Concord’ varie­ty by 660 cm2/plant. The best plant biometrics of cutting lettuce of the studied varieties and optimal concentration of complex microfertilizer Avatar-1 (0.25% solution) was defined that is important for improving agricultural cultivation techniques.

Purpose. To investigate the variability of plant biometrics of cutting lettuce (Lactuca sativa L.) varieties depending on the concentration of microfertilizer Avatar-1. Methods. Field study, biometric technique, comparative approach, statistical evaluation, generalization. Results. Dependence of the plant height, the diameter of the leaf rosette, the number of leaves per plant, the leaf area of plants on the concentration of microfertilizer Avatar-1 was defined. Investigations of cutting lettuce ‘Afitsyon’ and ‘Concord’ varieties by Dutch breeding were conducted in 2016–2017 in the collection sites of the department of vegetable growing in the scientific-experimental field  “Fruit and vegetable garden” of the National University of Life and Environmental Sciences of Ukraine. In order to determine dependence of plant biometrics of cutting lettuce varieties on the concentration of complex microfertilizer Avatar-1, the following scheme was used for the both varieties: variant 1 – water (control); variant 2 – 0,10% solution; variant 3 – 0,25% solution; variant 4 – 0,50% solution. Plants were treated with microfertilizer three times during the vegetative period. Alterations of plant biometrics of cutting lettuce ‘Afitsyon’ and ‘Concord’ varieties  depending on the concentration of complex microfertilizer Avatar-1 was studied. Conclusions. It was found that in case of three-time plant treatment with complex microfertilizer Avatar-1 at the time of harvesting, the best plant biometrics was registered in variant 3 (concentration 0,25%) for the both ‘Afitsyon’ and ‘Concord’ varie­ties of cutting lettuce. The height of plants of the cutting lettuce in ‘Afitsyon’ variety exceeded this figure in ‘Concord variety by 1,1–1,4 cm. The concentration of microfertilizer had no significant effect on the diameter of the leaf rosette of ‘Concord’ variety (25,1–25,9 см). The diame­ter of the leaf rosette of ‘Afitsyon’ variety was 26,0–28,7 cm. In cutting lettuce, the largest leaf area per plant was registered in ‘Afi­tsyon’ variety (3516.5 cm2/plant ) in case of plants  treatment with 0,25% solution of complex microfertilizer Avatar-1 that exceeded this figure in ‘Concord’ varie­ty by 660 cm2/plant. The best plant biometrics of cutting lettuce of the studied varieties and optimal concentration of complex microfertilizer Avatar-1 (0.25% solution) was defined that is important for improving agricultural cultivation techniques.

Purpose. Theoretical and experimental substantiation of introduction of “Romantica” roses originated by Meilland company under the conditions of the Right-Bank Forest-Steppe Zone of Ukraine. Methods. Biometrical, comparative-morphological, statistic ones. Results. Viability, growth and development indices as well as ornamental qualities (tolerance for winter conditions, frost hardiness, drought resistance, complex disease and pest resistance, habit maintenance, shoot formation, flowering, coloration, shape of flowers, petal number etc.) were analyzed for 12 rose cultivars of “Romantica” series planted on the collection and exhibition plots of the National Dendrological Park «Sofiivka» NAS of Ukraine. The investigations were conducted within 2012–2015. The most of the cultivars got the mark of introduction success 41–45 points of 50; so, the cultivars are totally promising for introduction into the conditions of the Right-Bank Forest-Steppe Zone of Ukraine. ‘Leonardo da Vinci’ and ‘Yves Piaget’ cultivars got point number 35–38 and they can be considered promising ones. The acclimatization number for the most of the investigated cultivars was 85–90 points of 100 that means good adaptation of the plants in the conditions of the Right-Bank Forest-Steppe Zone of Ukraine. The adaptation of cv. ‘Leonardo da Vinci’ and cv. ‘Yves Piaget’ roses (point number 75) can be considered satisfactory. The total evaluation of “Romantica” roses ornamental qualities made 76–87 points of 100; so, all the cultivars display high ornamental qualities and deserve to be introduced to the production. Conclusions. The garden roses of “Romantica” series originated by Meilland company being introduced into the conditions of the Right-Bank Forest-Steppe Zone of Ukraine are adapted well in the introduction region and they are promising for the subsequent introduction.

The article provides methodological ground (method of morphological description) for identification of qualitative, quantitative and pseudo-qualitative characteristics of maize hybrids (Zea mays L) disclosing methodological facets of practical appliance for histogram and variation curve of morphological characteristics of the phenotype by uniformity test and unveiling the link between quantitative characteristics of the ear and economically valuable indices of plant productivity. Target of the research has covered physiological and biochemical processes of plant productivity development into relevant phenological growth and development stages followed by relevant observations and records of vegetative and generative organs of maize. The field examination results obtained are processed with mathematical and statistical methods with the view of searching for margins (min and max) of confidence intervals and in order to verify reliability of the research results with the view of follow-up construction of histogram and variation curve.

Purpose. Developing technology for clonal micropropagation of peppermint (Mentha piperita L.) plants of Ukrainian breeding based on the complex of methods of isolated tissue and organ culture in vitro. Methods. During the experiment, such methods as isolated tissue and organ culture in vitro, clonal micropropagation, detached scion grafting, chemotherapy with adding of virucide Ribavirin to the nutrient medium, biometric and statistical ones were used. Results. The stepped procedure of sterilization that we have developed allows to receive 88–100% of sterile explants. For M. piperita L. introduction into culture and clonal micropropagation, Murashige and Skoog (MS) nut­rient medium appeared to be optimal supplemented with 6-benzylaminopurine (0.75 mg/l), adenine (0.05 mg/l), indole-3-acetic acid (IAA) (0.05 mg/l) and gibberellic acid (0.5 mg/l) on which the reproduction ratio on the 28th day ranged between 1:7 and 1:15. For recovery of plants from viral infection, virucide Ribavirin at concentration of 10 mg/l was added to the nutrient medium. The proposed nutrient medium for rhizogenesis, that contained IAA (0.5 mg/l) and indole butyric acid (IBA) (0.5 mg/l), allows to obtain the frequency of rhizogenesis up to 84–100%. Regenerated plants were adapted to the conditions in vivo on substrate peat : universal soil : perlite : sand in the ratio 2:1:1:1. The survival rate for peppermint varieties amounted to 96–100%. Conclusions. Biotechnological scheme was developed that permits to get healthy, purebred planting material and intensively propagate plants for supplying breeding programs of the Experimental Station for Medicinal Plants of the Institute of Agroecology and Environmental Management of the National Academy of Agrarian Sciences of Ukraine, among which such varieties as ‘Lebedyna pisnia’ and ‘Ukrainska pertseva’ were selected as the most promising for clonal micropropagation.

β-tubulin, calmodulin, internal transcribed spacer and partial lsu-rDNA, RNA polymerase 2, DNA replication licensing factor Mcm7, and pre-rRNA processing protein Tsr1 were amplified and sequenced from numerous isolates belonging to Aspergillus sect. versicolor. The isolates were analyzed phylogenetically using the concordance model to establish species boundaries. Aspergillus austroafricanus, A. creber, A. cvjetkovicii, A. fructus, A. jensenii, A. puulaauensis, A. subversicolor, A. tennesseensis and A. venenatus are described as new species and A. amoenus, A. protuberus, A. sydowii, A. tabacinus and A. versicolor are accepted as distinct species on the basis of molecular and phenotypic differences. PCR primer pairs used to detect A. versicolor in sick building syndrome studies have a positive reaction for all of the newly described species except A. subversicolor.

Purpose. Conducting economic evaluations of late varie­ties of white cabbage of various sort types bred by Kyiv experimental station of the Institute of Vegetables and Melons NAAS of Ukraine (IVM). Methods. Field, laboratory, statistical. Results. Experimental studies included phenological observations of plants growth and development, biometric measurements of vegetative and edible parts of plants, determination of biochemical сomposition of heads, records of yield and storability of late varieties of white cabbage of such sort types as Amager and Langedijska winter. Varieties with the highest yield, best biochemical composition and excellent storability of cabbage heads during four and six month periods were identified. Conclusions. Among the cabbage samples of Amager sort types, late variety Vasylyna was characterized by the highest yields. Olga variety provided the significant increase in productivity. Violanta variety had the highest yield within the sort type Langedijska (Langendijker) winter. Knyagynіa variety far exceed indices of standard Langendijker detsema. Late varieties of the first sort type produced the highest yield, the second ones demonstrated better biochemical composition and excellent storability of cabbage heads during four and six month period.

Purpose. Conducting economic evaluations of late varie­ties of white cabbage of various sort types bred by Kyiv experimental station of the Institute of Vegetables and Melons NAAS of Ukraine (IVM). Methods. Field, laboratory, statistical. Results. Experimental studies included phenological observations of plants growth and development, biometric measurements of vegetative and edible parts of plants, determination of biochemical сomposition of heads, records of yield and storability of late varieties of white cabbage of such sort types as Amager and Langedijska winter. Varieties with the highest yield, best biochemical composition and excellent storability of cabbage heads during four and six month periods were identified. Conclusions. Among the cabbage samples of Amager sort types, late variety Vasylyna was characterized by the highest yields. Olga variety provided the significant increase in productivity. Violanta variety had the highest yield within the sort type Langedijska (Langendijker) winter. Knyagynіa variety far exceed indices of standard Langendijker detsema. Late varieties of the first sort type produced the highest yield, the second ones demonstrated better biochemical composition and excellent storability of cabbage heads during four and six month period.

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

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

Scientifically validated items of growing technology disclosed for cos lettuce marketable products in the conditions of Forest-Steppe of Ukraine. Impact of environmental factors onto growth and development of Lactuca sativa var. longifolia L. plants. Sowing terms established for the seed of cos lettuce at field-seeded growing. Development parameters are quoted for plant productivity indices and marketable product indices for cos lettuce of national and foreign breeding. According to VCU characteristics a  typical model has been designed for the cos lettuce indices of suitability for dissemination in Ukraine.

Scientifically validated items of growing technology disclosed for cos lettuce marketable products in the conditions of Forest-Steppe of Ukraine. Impact of environmental factors onto growth and development of Lactuca sativa var. longifolia L. plants. Sowing terms established for the seed of cos lettuce at field-seeded growing. Development parameters are quoted for plant productivity indices and marketable product indices for cos lettuce of national and foreign breeding. According to VCU characteristics a typical model has been designed for the cos lettuce indices of suitability for dissemination in Ukraine.