Purpose. Studying and identifying winter wheat varieties that are resistant to causal agents of major diseases and pests. Methods. Laboratory analysis, field study. Results. On artificial infection backgrounds of causal agents such varieties as ‘Smuhlianka’, ‘Svitanok Myronivskyi’, ‘Berehynia Myronіvska’, ‘Horlytsia Myronіvska’ have shown high level of resistance to brown rust; ‘Svitanok Myronivskyi’, ‘Berehynia Myronіvska’ – to powdery mildew; ‘Smuhlianka’ – to covered smut. Varieties ‘Voloshkova’, ‘Yuviliar Myronivskyi’, ‘Myrliena’, ‘Oberih Myronivskyi’, ‘Kolos Myronivschyny’, ‘Lehenda Myronivska’ had medium resistance to Septoria leaf blotch; ‘Smuhlianka’, ‘Myrliena’, ‘Oberih Myronivskyi’, ‘Berehynia Myronіvska’, ‘Horlytsia Myronіvska’, ‘Myronivska storichna’ – to Fusarium head blight; ‘Myronіvska 65’, ‘Smuhlianka’, ‘Lehenda Myronivska’, ‘Berehynia Myronіvska’ – to root rots. Among the varieties studied, there were those with group resistance to diseases: ‘Voloshkova’, ‘Myrliena’, ‘Yuviliar Myronivskyi’, ‘Oberih Myronivskyi’, ‘Bohdana’, ‘Myronivska storichna’, ‘Ekonomka’, ‘Svitanok Myronivskyi’, ‘Berehynia Myronіvska’, ‘Horlytsia Myronіvska’, ‘Smuhlianka’. Varieties bred at the V. M. Remeslo Myronivka Institute of Wheat are distinguished by pest resistance. During autumn tillering phase of winter wheat the smallest number of large cereal aphids was observed in varieties ‘Smuhlianka’ and ‘Myronivska storichna’, leafhoppers – in varieties ‘Smuhlianka’, ‘Myrliena’, ‘Yuviliar Myronivskyi’. The slight population of thrips in the phase of earing was marked in the variety ‘Kolos Myronivschyny’, in the milk-ripe stage the smallest number of larvae per ear was detected in varieties ‘Smuhlianka’, ‘Voloshkova’, ‘Kolos Myronivschyny’. Varieties ‘Lehenda Myronivska’ and ‘Smuhlianka’ were proved to be resistant to damages of stems by sawflies. It should be noted that ‘Smuhlianka’ variety shows resistance to aphids, leafhoppers and grain sawflies. Conclusions. It was established that winter wheat varieties bred at the V. M. Remeslo Myronivka Instutite of Wheat are characterized by resistance to certain causal agents, some of them – to their group. Varieties that are resistant to the most common and harmful phytophages were identified.

Purpose. Studying and identifying winter wheat varieties that are resistant to causal agents of major diseases and pests. Methods. Laboratory analysis, field study. Results. On artificial infection backgrounds of causal agents such varieties as ‘Smuhlianka’, ‘Svitanok Myronivskyi’, ‘Berehynia Myronіvska’, ‘Horlytsia Myronіvska’ have shown high level of resistance to brown rust; ‘Svitanok Myronivskyi’, ‘Berehynia Myronіvska’ – to powdery mildew; ‘Smuhlianka’ – to covered smut. Varieties ‘Voloshkova’, ‘Yuviliar Myronivskyi’, ‘Myrliena’, ‘Oberih Myronivskyi’, ‘Kolos Myronivschyny’, ‘Lehenda Myronivska’ had medium resistance to Septoria leaf blotch; ‘Smuhlianka’, ‘Myrliena’, ‘Oberih Myronivskyi’, ‘Berehynia Myronіvska’, ‘Horlytsia Myronіvska’, ‘Myronivska storichna’ – to Fusarium head blight; ‘Myronіvska 65’, ‘Smuhlianka’, ‘Lehenda Myronivska’, ‘Berehynia Myronіvska’ – to root rots. Among the varieties studied, there were those with group resistance to diseases: ‘Voloshkova’, ‘Myrliena’, ‘Yuviliar Myronivskyi’, ‘Oberih Myronivskyi’, ‘Bohdana’, ‘Myronivska storichna’, ‘Ekonomka’, ‘Svitanok Myronivskyi’, ‘Berehynia Myronіvska’, ‘Horlytsia Myronіvska’, ‘Smuhlianka’. Varieties bred at the V. M. Remeslo Myronivka Institute of Wheat are distinguished by pest resistance. During autumn tillering phase of winter wheat the smallest number of large cereal aphids was observed in varieties ‘Smuhlianka’ and ‘Myronivska storichna’, leafhoppers – in varieties ‘Smuhlianka’, ‘Myrliena’, ‘Yuviliar Myronivskyi’. The slight population of thrips in the phase of earing was marked in the variety ‘Kolos Myronivschyny’, in the milk-ripe stage the smallest number of larvae per ear was detected in varieties ‘Smuhlianka’, ‘Voloshkova’, ‘Kolos Myronivschyny’. Varieties ‘Lehenda Myronivska’ and ‘Smuhlianka’ were proved to be resistant to damages of stems by sawflies. It should be noted that ‘Smuhlianka’ variety shows resistance to aphids, leafhoppers and grain sawflies. Conclusions. It was established that winter wheat varieties bred at the V. M. Remeslo Myronivka Instutite of Wheat are characterized by resistance to certain causal agents, some of them – to their group. Varieties that are resistant to the most common and harmful phytophages were identified.

Purpose. Selecting spring wheat lines with increased adaptive capacity. Methods. Field experiments, statistical evaluation. Results. Lines of spring soft wheat with better adaptive capacity were identified (‘Erythrospermum 13-39’, ‘Lutescens 11-16’, ‘Lutescens 05-24’, ‘Lutescens 10-36’) and spring durum wheat (‘Melanopus 10-02’ (biotype II), ‘Melanopus 10-02’, ‘Melanopus 10-03’, ‘Hordeiforme 12-12’). Spring soft wheat varieties ‘Zlata’, ‘Dubravka’, ‘Oksamyt Myronivskyi’, ‘Bozhena’ and spring durum wheat varieties ‘MIP Raiduzhna’, ‘Magdalena’ with increased adaptive capacity were passed for State variety testing. Conclusions. With regard to the analysis of parameters of yield capacity and its variability under the influence of changing environmental factors, soft and durum spring wheat lines with increased adaptive capacity were identified. The best spring wheat lines for general adaptive capacity were passed for State variety testing. Soft spring wheat variety ‘Zlata’ and durum spring wheat variety ‘MIP Raiduzhna’, in 2014, and such soft spring wheat varieties as ‘Dubravka’, ‘Oksamyt Myronivskyi’, ‘Bozhena’ and spring durum wheat variety ‘Magdalena’, in 2015, were passed for State variety testing.

Рurpose. To investigate inheritance of “plant height” trait in populations of the first (F1) and second (F2) generations of the soybean (Glucine max (L.) Merrill) and evaluate hybrid combinations in order to identify phenotypes with the highest level of heterosis for plant height. Methods. Laboratory test, mathematical and statistical analysis. Results. The inheritance of plant height in soybean was investigated. Hybrid combinations were assessed for the ability to select phenotypes with an optimal height. Different types of inheritance of this trait were found in populations of the second generation. The highest degree of heterosis for plant height was expressed by such soybean hybrids of the second generation as ‘АЕЕМ ’/‘Cherniatka’ (102.6%), next were ‘№ 427/‘Коrado’ (36,1%) and ‘Yelena’/‘Vizhion’ (32,0%). For the above trait, the ‘Legend’ variety in combinations with such varieties as ‘Staroukrainka’, ‘Korado’ and ‘Medeia’ expressed a heterosis amounting to 28.1%, 8.3%, 6.1% accordingly. Plant height was inherited mainly in terms of negative overdominance (34.2% combinations). There were 21.1% of combinations that had a negative semidominance. Conclusions. Among large majority of crossing combinations, forms were revealed that differed greatly for the plant height. The highest variability was observed in combinations such as ‘Legenda’/‘Korado’, ‘Ustia’/‘Vizjion’, ‘№894’/‘Vizjion’, ‘Ug-30’/‘Vizjion’, ‘Legenda’/‘Annushka’, ‘№441’/‘Gentleman’, ‘№441’/‘Vizjion’, ‘Yug-30’/‘Gentleman’, ‘Angelica’/‘Annushka’ and ‘Angelica’/‘Gentleman.

Purpose. Comparative studies of the photosynthetic apparatus of winter wheat varieties of modern and earlier breeding in the relation to their productivity. Methods. Field, pot experiment, biometrical, gas analysis, analytical and statistical ones. Results. It is found that the modern high-yielding winter wheat varieties have a higher rate of flag leaf photosynthesis during generative period of development, particularly at grain filling period, improved ability to store assimilates in stem and effectively use them later for grain growth. The modern varieties form crop canopy with greater leaf area and chlorophyll indexes and larger photosynthetic capacity and maintain functional activity of photosynthetic apparatus longer at the end of the growing season. Conclusions. The superiority for grain productivity of modern high-yielding wheat varieties, originated from the Institute of Plant Physio­logy and Genetics, NAS of Ukraine, over varieties released before the “green revolution”, results from increased capacity and durability of functioning the crop photosynthetic apparatus, higher CO2 assimilation rate and optimization of source-sink relations in whole plant.

Цель. Установить наиболее эффективные индексные показатели для определения селекционной ценности генотипов пшеницы яровой.Методы. Полевой, статистический. Определяли индекс перспективности – IР, финно-скандинавский индекс – FSI, мексиканский – MI, белоцерковский – БI, полтавский – РI, линейной плотнос­ти колоса – ЛЩК, плотности колоса – ЩК.Результаты. В период проведения исследований погодные условия отличались от средних многолетних показателей по температурному режиму, количеству атмосферных осадков и их распределению по месяцам. Оптимальные условия вегетационного периода сложились в 2016 г. (ГТК = 1,1), недостаточным уровнем влажности характеризовался 2017 г. (ГТК = 0,2). Это дало возможность установить селекционные индексы для различных условий выращивания пшеницы мягкой и твердой яровой. Анализ полученных данных показал, что IР варьировал как у разных сортов, так и по годам, что свидетельствует о различной реакции генотипов на условия вегетации, сложившиеся в годы выращивания. Высоким показателем FSI характеризовались сорта пшеницы твердой – ‘Славута’ и мягкой яровой – ‘Струна мироновская’. К сортам пшеницы твердой с высоким уровнем МІ отнесены: ‘МИП Магдалена’, ‘МИП Радужная’, ‘Кучумовка’, ‘Харьковская 41’ и мягкой яровой – ‘МИП Злата’, ‘Оксамыт мироновский’, ‘Струна мироновская’, ‘Элегия мироновская’. Самые высокие показатели ЛПК и БІ сорта пшеницы яровой сформировали в 2016 г. РІ был в пределах от 2,3 до 4,5 у сортов пшеницы твердой и от 2,2 до 6,4 – мягкой яровой. Важным в селекции является использование селекционных индексов, которые необходимо включать на основании признаков, имеющих достоверную корреляционную связь с показателями урожайности. Наиболее эффективными для сортов пшеницы твердой яровой в оптимальный год увлажнения (2016) оказались индексы ЩК (r = 0,53±0,08), БІ (r = 0,42±0,08), МІ (r = 0,41±0,08), для мягкой в 2016 и 2017 гг. – РІ (r = 0,39±0,07; r = 0,34±0,07 соответственно). По комплексу селекционных индексов выделены такие сор­та пшеницы мягкой яровой: ‘Струна мироновская’, ‘Симкода мироновская’, ‘МИП Злата’ и твердой: ‘МИП Магдалена’, ‘МИП Райдужная’, ‘Славута’, ‘Кучумовка’.Выводы. Наиболее эффективными для сортов пшеницы твердой яровой были индексы ЩК, БІ, МІ, для мягкой – РІ. Выделенные сорта пшеницы яровой характеризовались оптимальным соотношением исследуемых признаков. | Purpose. To establish the most effective index figures for determination of breeding value of spring wheat genotypes.Methods. Field and statistical ones. Index of prospectivity – IP, Finno-Scandinavian index – FSI, Mexican index – MI, Bila Tserkva index – BI, Poltava index – PI, index of spike linear density – ISLD, index of spike density – ISD were defined.Results. During the investigation period, weather conditions differed from the long-term average annual indices for temperature regime, amount of precipitation and its distribution by month. Conditions of the growing season was the most favorable in 2016 (HTC = 1.1), insufficient level of humidity was specific for 2017 (HTC = 0.2). This allowed to define breeding indices for the soft wheat and spring durum wheat growing under different conditions. The analysis of the obtained data showed that the IP varied both in varieties and over the years, that indicated a various response of genotypes to vegetation conditions that existed during the growing years. Varieties of durum wheat ‘Slavuta’ and soft spring wheat ‘Struna myronivska’ were characterized by the high FSI. Such durum wheat varieties as ‘MIP Magdalena’, ‘MIP Raiduzhna’, ‘Kuchumivka’, ‘Kharkivska 41’, as well as the following soft spring varieties as ‘MIP Zlata’, ‘Oksamyt myronivskyi’, ‘Struna myronivska’, ‘Elehiya myronivska’ had a high level of MI. The spring wheat varieties have the highest indices of LSD and BI in 2016. IP during the investigation period was ranging from 2.3 to 4.5 in durum wheat varieties and from 2.2 to 6.4 in soft spring wheat. In breeding, it is important to use breeding indices, which should be included on the basis of traits that have a reliable correlation with yield index. SD indices (r = 0.53±0.08), BI (r = 0.42±0.08), MI (r = 0.41±0.08) were the most effective for durum spring wheat varieties in the year to be the best for humidification (2016), while PI (r = 0.39±0.07; r = 0.34±0.07 respectively) was the most effective for the soft wheat in 2016 and 2017. For the complex of breeding indices, the varieties of soft spring wheat (‘Struna myronivska’, ‘Simkoda myronivska’, ‘MIP Zlata’) and durum (MIP Mahdalena’, ‘MIP Raiduzhna’, ‘Slavuta’, ‘Kuchumivka’) were defined.Conclusions. The indices SD, BI, MI were the most effective for durum spring wheat varieties and PI – for soft wheat. Selected spring wheat varieties showed the optimum ratio between investigated traits. | Мета. Встановити найефективніші індексні показники для визначення селекційної цінності генотипів пшениці ярої.Методи. Польовий, статистичний. Визначали індекс перспективності – ІР, фіно-скандинавський індекс – FSI, мексиканський – MI, білоцерківський – БІ, полтавський – РІ, лінійної щільності колоса – ЛЩК, щільності колоса – ЩК.Результати. Протягом періоду досліджень погодні умови відрізнялись від середніх багаторічних показників за температурним режимом, кількістю атмосферних опадів та їх розподілом по місяцях. Оптимальні умови вегетаційного періоду склалися у 2016 р. (ГТК = 1,1), недостатнім рівнем вологості характеризувався 2017 р. (ГТК = 0,2). Це дало змогу встановити селекційні індекси для різних умов вирощування пшениці м’якої та твердої ярої. Аналіз отриманих даних показав, що ІР варіював як у різних сортів, так і за роками, що свідчить про різну реакцію генотипів на умови вегетації, які склались у роки вирощування. Високим показником FSI характеризувалися сорти пшениці твердої – ‘Славута’ та м’якої ярої – ‘Струна миронівська’. До сортів пшениці твердої із високим рівнем МІ віднесено: ‘МІП Магдалена’, ‘МІП Райдужна’, ‘Кучумівка’, ‘Харківська 41’, а до м’якої ярої – ‘МІП Злата’, ‘Оксамит миронівський’, ‘Струна миронівська’, ‘Елегія миронівська’. Найвищі показники ЛЩК та БІ сорти пшениці ярої сформували у 2016 р. РІ за період проведених досліджень був у межах від 2,3 до 4,5 у сортів пшениці твердої та від 2,2 до 6,4 – м’якої ярої. Важливим у селекції є використання селекційних індексів, які необхідно включати на підставі ознак, що мають достовірний кореляційний зв’язок з показниками врожайності. Найефективнішими для сортів пшениці твердої ярої в оптимальний рік зволоження (2016) виявились індекси ЩК (r = 0,53±0,08), БІ (r = 0,42±0,08), МІ (r = 0,41±0,08), для м’якої у 2016 і 2017 рр. – РІ (r = 0,39±0,07; r = 0,34±0,07 відповідно). За комплексом селекційних індексів виділено такі сорти пшениці м’якої ярої: ‘Струна миронівська’, ‘Сімкода миронівська’, ‘МІП Злата’ та твердої: ‘МІП Магдалена’, ‘МІП Райдужна’, ‘Славута’, ‘Кучумівка’.Висновки. Найбільш ефективними для сортів пшениці твердої ярої були індекси ЩК, БІ, МІ, для м’якої – РІ. Виділені сорти пшениці ярої характеризувались оптимальним співвідношенням досліджуваних ознак.

Purpose. Assessment and selection of self-pollinated S5 maize (Zea mays L.) families with high combining ability and wide adaptive capacity obtained on the basis of specially produced hybrids by crossing elite lines of various genetic plasms with the best main agronomic characters. Methods. Field studies, mathematico-statistical evaluation. Results. An amplitude of grain yield ranging from 5.96–10.96 t/ha (x = 8.44 t/ha) in 2013 to 2.67–7.59 t/ha (x = 5.08 t/ha) in 2014 was determined in the course of study of the testcrosses of self-pollinated S5 families. It was found that different response of genotypes of the studied testcrosses to the year conditions significantly affected the average yield level, which decreased in the stressful 2014 by 3.4 t/ha as compared to 2013. The results of the assessment based on the general and specific combining ability of new parent material of mixed germplasm were shown. A significant variability of the estimates of GCA (general combining ability) effects depending on the year conditions was observed in the course of study. A marked difference in the estimates of GCA effects based on the grain yield was revealed. They were persistently high in 19% of the best self-pollinated families in both years, 14% of the families had persistently low estimates of GCA effects, 67% changed their value depending on the genotype and year conditions. Conclusions. 17 best self-pollinated families with persistently high estimates of GCA, 6 families featuring high tolerance to drought and 4 families with persistently high variances of SCA were selected. The selected families will be used as a parent material in selection programs aimed to create new high performance hybrids.

Мета. Дослідити формування продуктивності сорту сої культурної ‘Говерла’ за використання різних елементів технології вирощування. Методи. Польові, лабораторні, статистичні (розрахунково­порівняльний, математично­статистичний). Результати. Встановлено ефективність весняного чизелювання за вирощування сої культурної сорту ‘Говерла’ в ґрунтово­кліматичних умовах Прикарпаття. Відзначено позитивний вплив досліджуваних способів обробітку ґрунту на фітосанітарний стан посівів. Зокрема, поєднання зяблевої оранки з весняним чизелюванням за внесення мінеральних добрив N30P30K30 та дворазового позакореневого обприскування посівів регулятором росту зумовило підвищення конкурентоздатності рослин проти бур’янів та знизило чисельність останніх на 46,2%, як порівняти з контролем. Виконання вищевказаних дій також сприяло збільшенню врожайності до 2,48 т/га, або на 57,0%, у середньому за три роки. Водночас зріс вихід кормових одиниць та перетравного протеїну – на 1,35 і 0,3 т/га відповідно. Висновки. Весняне чизелювання разом із зяблевою оранкою та раціональним поєднанням у системі удобрення побічної продукції попередника, запропонованих доз мінеральних добрив і регулятора росту в умовах Прикарпаття сприяли зниженню забур’яненості посівів на 46,2% та підвищенню врожайності сорту сої культурної ‘Говерла’ на 57,0%. | Purpose. To study the formation of the productivity of the ‘Hoverla’ soybean variety using different elements of cultivation technology.  Methods. Field, laboratory, statistical (calculation­comparative, mathematical­statistical). Results. The effectiveness of spring chisel ploughing for the cultivation of the soyabean variety ‘Hoverla’ in the soil and climatic conditions of the  Prykarpattia region was established. The positive effect of the studied tillage methods on the phytosanitary condition of the crop was noted. In particular, the combination of autumn ploughing and spring chisel ploughing with the application of N30P30K30 mineral fertiliser and double foliar spraying of crops with a growth regulator led to an increase in the competitiveness of plants against weeds and reduced the number of weeds by 46.2% compared to the control. The implementation of the above measures also contributed to an increase in yield to 2.48 t/ha, or 57.0% on average over three years. At the same time, the yield of forage units and digestible protein increased by 1.35 and 0.3 t/ha respectively. Conclusions. Spring chisel ploughing, together with autumn ploughing and a rational combination of the predecessor’s by­products, the proposed doses of mineral fertiliser and growth regulator in the conditions of the Prykarpattia region, helped to reduce the weediness of crops by 46.2% and increase the yield of the ‘Ho­verla’ soybean variety by 57.0%.

Purpose. Studying variety samples of winter triticale of various ecological and geographical origin for revealing polymorphism of the culture for its susceptibility to pathogenic complex of Fusarium head blight and defining high-yielding and resistant to diseases varieties that later can be put into the production and breeding process. Methods. Field experiments, statistical evaluation. Results. It was defined that the development of Fusarium head blight in different variety samples of winter triticale depends on the hydrothermal conditions and genotype of the host-plant. Resistance of varieties and hybrids to the disease was partial, and no immune samples were found among the analyzed ones. The following varieties proved to be tolerant to Fusarium head blight: ‘Granat’, ‘Zorro’, ‘Obrii Myronivskyi’. The positive correlation between the development of Fusarium head blight and root rot of winter triticale was found. It was determined that in the pathogenic complex of Fusarium head blight the amount of the following pathogens is increasing: Fusarium sporotrichioides, F. аvenaceum and F. poae. Conclusions. The leading varieties that combine high yields and resistance to Fusarium head blight are as follows: ‘Obrii Myronivskyi’, ‘ADM 8’, ‘Yuvileine Volynske’, ‘Yukon’, ‘Zorro’, ‘Tsekad 90’, ‘Zerniatko’, ‘Legion’ and ‘Rarytet’. These varieties should be involved in the selection process to breed the hybrids with the augmented resistance to the disease and high yields.

Purpose. Studying variety samples of winter triticale of various ecological and geographical origin for revealing polymorphism of the culture for its susceptibility to pathogenic complex of Fusarium head blight and defining high-yielding and resistant to diseases varieties that later can be put into the production and breeding process. Methods. Field experiments, statistical evaluation. Results. It was defined that the development of Fusarium head blight in different variety samples of winter triticale depends on the hydrothermal conditions and genotype of the host-plant. Resistance of varieties and hybrids to the disease was partial, and no immune samples were found among the analyzed ones. The following varieties proved to be tolerant to Fusarium head blight: ‘Granat’, ‘Zorro’, ‘Obrii Myronivskyi’. The positive correlation between the development of Fusarium head blight and root rot of winter triticale was found. It was determined that in the pathogenic complex of Fusarium head blight the amount of the following pathogens is increasing: Fusarium sporotrichioides, F. аvenaceum and F. poae. Conclusions. The leading varieties that combine high yields and resistance to Fusarium head blight are as follows: ‘Obrii Myronivskyi’, ‘ADM 8’, ‘Yuvileine Volynske’, ‘Yukon’, ‘Zorro’, ‘Tsekad 90’, ‘Zerniatko’, ‘Legion’ and ‘Rarytet’. These varieties should be involved in the selection process to breed the hybrids with the augmented resistance to the disease and high yields.

Purpose. Revealing of adaptive properties of plant varieties of red beet Bordeaux Kharkivskyi and Aktion based on the study of plant growth regulators for marketable production in the Steppe zone of Ukraine. Methods. Field, laboratory ones, variance analysis. Results. The influence of plant growth regulators (Lignogumat, Betastimulin) on earliness and productivity of such red beet varieties as Bordeaux Kharkivskyi and Aktion was established. Conclusions. Plant growth regulators (Betastimulin, Lignogumat) stimulated seed sprouting of red beet Bordeaux Kharkivskyi and Aktion varieties, activated vegetative plant growth increa­sing marketable yield. Application of Betastimulin (0.2%) for red beet Kharkivskyi Bordeaux and Aktion varieties provides the highest number of marketable beetroots, thus forming marketable yield of 44.7 and 54.9 t/ha respectively with the average beetroot weight of 328–519 g.

Purpose. Revealing of adaptive properties of plant varieties of red beet Bordeaux Kharkivskyi and Aktion based on the study of plant growth regulators for marketable production in the Steppe zone of Ukraine. Methods. Field, laboratory ones, variance analysis. Results. The influence of plant growth regulators (Lignogumat, Betastimulin) on earliness and productivity of such red beet varieties as Bordeaux Kharkivskyi and Aktion was established. Conclusions. Plant growth regulators (Betastimulin, Lignogumat) stimulated seed sprouting of red beet Bordeaux Kharkivskyi and Aktion varieties, activated vegetative plant growth increa­sing marketable yield. Application of Betastimulin (0.2%) for red beet Kharkivskyi Bordeaux and Aktion varieties provides the highest number of marketable beetroots, thus forming marketable yield of 44.7 and 54.9 t/ha respectively with the average beetroot weight of 328–519 g.

Purpose. To study the influence of agriecological conditions of edaphic-climatic macro- and microzones on adap­tability and productivity of new soft winter wheat, identification and selection of complementary varieties for appropriate conditions. Methods. Field, laboratory, analytical and statistical ones. Results. Peculiarities of the formation of productivity of varieties and its stability cultivation on the condions of cultivation in edaphic-climatic zones, subzones and microzones, including favourable and unfavou­rable years were studied. For realizing the potential of their productivity, it is advisable to introduce a differentiated approach to their cultivation in agri-climatic zones, subzones, microzones according to the requirements of biological characteristics of varieties, their natural adaptive capacity, natural and ecological environment of these zones. Complementary varieties were identified and recommended for use in edaphic-climatic zones, subzones and microzones that demonstrated high plasticity, better adaptability to favourable agri-ecological factors and were more tolerant and resistant to adverse ones. Conclusions. According to the set of productivity and ecological plasticity indices, it is desirable to cultivate varieties Sotnytsya, Kalancha, Hurt, Tonatsiya, Dobrochyn, Gubernator Donu in the Steppe zone; Sotnytsya, Oriyka, Lira Odeska, Tatsitus and Fidelius – in the Forest-Steppe; Tatsitus, Fidelius, Sailor, Etela – in the Polissia.

Purpose. To study the influence of agriecological conditions of edaphic-climatic macro- and microzones on adap­tability and productivity of new soft winter wheat, identification and selection of complementary varieties for appropriate conditions. Methods. Field, laboratory, analytical and statistical ones. Results. Peculiarities of the formation of productivity of varieties and its stability cultivation on the condions of cultivation in edaphic-climatic zones, subzones and microzones, including favourable and unfavou­rable years were studied. For realizing the potential of their productivity, it is advisable to introduce a differentiated approach to their cultivation in agri-climatic zones, subzones, microzones according to the requirements of biological characteristics of varieties, their natural adaptive capacity, natural and ecological environment of these zones. Complementary varieties were identified and recommended for use in edaphic-climatic zones, subzones and microzones that demonstrated high plasticity, better adaptability to favourable agri-ecological factors and were more tolerant and resistant to adverse ones. Conclusions. According to the set of productivity and ecological plasticity indices, it is desirable to cultivate varieties Sotnytsya, Kalancha, Hurt, Tonatsiya, Dobrochyn, Gubernator Donu in the Steppe zone; Sotnytsya, Oriyka, Lira Odeska, Tatsitus and Fidelius – in the Forest-Steppe; Tatsitus, Fidelius, Sailor, Etela – in the Polissia.

Purpose. To study interactions among the representatives of the genus Salix L. through the cluster analysis, form groups of closely related species and hybrid forms basing on differences of morphological parameters of leaves. Methods. Field, cluster analysis and tree graphics. Results. Willow species were grouped according to absolute parameters of leaf, and three groups of clusters were identified. The degree of affinity between species were assessed using values of an Euclidean distance. Distinctive features of leaf parameters were defined: length of a leaf blade (Ll), distance (cm) between the leaf tip and its maximum width (SDmxT) and the distance between the leaf tip (cm) and the line of its width that corresponds to the length of petiole (SLpT). Conclusions. Using the willow species collection as an example, diagnostically valuable quantitative parameters of leaves were revealed, the use of which allows to identify willow species and hybrid forms through PC applications.

Purpose. To study interactions among the representatives of the genus Salix L. through the cluster analysis, form groups of closely related species and hybrid forms basing on differences of morphological parameters of leaves. Methods. Field, cluster analysis and tree graphics. Results. Willow species were grouped according to absolute parameters of leaf, and three groups of clusters were identified. The degree of affinity between species were assessed using values of an Euclidean distance. Distinctive features of leaf parameters were defined: length of a leaf blade (Ll), distance (cm) between the leaf tip and its maximum width (SDmxT) and the distance between the leaf tip (cm) and the line of its width that corresponds to the length of petiole (SLpT). Conclusions. Using the willow species collection as an example, diagnostically valuable quantitative parameters of leaves were revealed, the use of which allows to identify willow species and hybrid forms through PC applications.

Purpose. Reviewing a history of formation and current state of the national nomenclature and streamlining the Ukrainian scientific species names for the genus Fragaria L. Results. Controversial attitudes towards the use of names «sunytsi» (= garden strawberry) and «polunytsi» (= hill strawberry) are inherently present in the Ukrainian nomenclature of the genus Fragaria L. The Ukrainian scientific names of species of this group of plants should be brought into line with the generic name “Sunytsi” in plural. Nothogeneric name x Fragophora Mezhenskyj (= Dasiphora Rafin. x Fragaria L.) is proposed. Conclusions. In a professional environment it is necessary to use only scientific names of species of the genus Fragaria – Sunytsi (= garden strawberry) that is used in plural in Ukrainian. Concerning garden strawberry, in every day life and popular literature the usage of a derivative sunytsia (in Ukrainian) in singular as well as polunytsia, polunytsi (in Ukrainian) may be permissible.

Purpose. Reviewing a history of formation and current state of the national nomenclature and streamlining the Ukrainian scientific species names for the genus Fragaria L. Results. Controversial attitudes towards the use of names «sunytsi» (= garden strawberry) and «polunytsi» (= hill strawberry) are inherently present in the Ukrainian nomenclature of the genus Fragaria L. The Ukrainian scientific names of species of this group of plants should be brought into line with the generic name “Sunytsi” in plural. Nothogeneric name x Fragophora Mezhenskyj (= Dasiphora Rafin. x Fragaria L.) is proposed. Conclusions. In a professional environment it is necessary to use only scientific names of species of the genus Fragaria – Sunytsi (= garden strawberry) that is used in plural in Ukrainian. Concerning garden strawberry, in every day life and popular literature the usage of a derivative sunytsia (in Ukrainian) in singular as well as polunytsia, polunytsi (in Ukrainian) may be permissible.

Purpose. Substantiating the selection of potato varieties for their ecological plasticity and stability to grow in Polissia. Methods. Field, laboratory, analitycal and statystical ones. Results. Impact of weather conditions during the growing season on the stability of potato varieties was estimated by indicators of yield, starch content and collection over the years by determining the average, standard deviation, minimum, maximum values and range of variation. ‘Memphis’, ‘Faluka’, ‘Arsenal’ and ‘Evolution’ were distinguished from the studied potato varieties by high genetic stability – their deviation from the average variance marked «minus» had values that were significantly less than zero. ‘Faktor’, ‘Flamenko’ and ‘Evora’ varieties are plastic (deviation is close to ±0), ‘Kolomba’, ‘Arizona’ and ‘Voliumiia’ ones – very plastic (deviation is most distant from zero). The studied varieties were distributed by homeostasis as follows: ‘Arizona’, ‘Colombo’, ‘Factor’ and ‘Memphis’ are the most valuable. Conclusions. ‘Evora’ potato variety can be considered intensive in terms of yield. ‘Evolution’ and ‘Flamenco’ varieties formed stable yields, during the years of study the difference between their maximum and minimum yields was the least – 8.2 and 9.3 tons per ha, respectively. Environmental assessment according to Eberhart and Russell indicates a high genetic stability of such potato varieties as ‘Arizona’, ‘Volyumiia’, ‘Kolombo’, ‘Evora’ and ‘Flamenko’. Conditions of Zhytomyr Oblast Plant Varieties Studying Centre are the most favorable among the studied regions to cultivate potato varieties.

Purpose. Substantiating the selection of potato varieties for their ecological plasticity and stability to grow in Polissia. Methods. Field, laboratory, analitycal and statystical ones. Results. Impact of weather conditions during the growing season on the stability of potato varieties was estimated by indicators of yield, starch content and collection over the years by determining the average, standard deviation, minimum, maximum values and range of variation. ‘Memphis’, ‘Faluka’, ‘Arsenal’ and ‘Evolution’ were distinguished from the studied potato varieties by high genetic stability – their deviation from the average variance marked «minus» had values that were significantly less than zero. ‘Faktor’, ‘Flamenko’ and ‘Evora’ varieties are plastic (deviation is close to ±0), ‘Kolomba’, ‘Arizona’ and ‘Voliumiia’ ones – very plastic (deviation is most distant from zero). The studied varieties were distributed by homeostasis as follows: ‘Arizona’, ‘Colombo’, ‘Factor’ and ‘Memphis’ are the most valuable. Conclusions. ‘Evora’ potato variety can be considered intensive in terms of yield. ‘Evolution’ and ‘Flamenco’ varieties formed stable yields, during the years of study the difference between their maximum and minimum yields was the least – 8.2 and 9.3 tons per ha, respectively. Environmental assessment according to Eberhart and Russell indicates a high genetic stability of such potato varieties as ‘Arizona’, ‘Volyumiia’, ‘Kolombo’, ‘Evora’ and ‘Flamenko’. Conditions of Zhytomyr Oblast Plant Varieties Studying Centre are the most favorable among the studied regions to cultivate potato varieties.