Peculiarities of developing national varietal resources of Lupin (Lupinus L.) in Ukraine have been explained. Market monitoring for annual lupin species have been completed. Peculiarities for the conduct of lupin plant varieties examination on establishing their suitability for dissemination compliance with the criteria of distinctness, uniformity and stability according to the guidelines in force. The conditions for developing the Program of Field Trials of Plant Varieties Qualifying Examination are displayed. Species specific and quantitative composition of fodder crops detailed as included into the Program. Essential soil and climatic cultivation areas proposed. Lupin uses outlined, as well as its application in various branches of national economy and value for establishing strong fodder backgrpund for cattle breeding. Prospective options of using lupin crop are spotted in connection with new plant varieties created, which seed by technological properties could be used for the purpose of preparing dietary foodstuff

Pourpose. Establish compliance of heat and moisture resources to biological requirements of sunflower hybrids (Helianthus annuus), reveal criteria for assessing weather conditions in the northern regions of Ukraine; establish links between temperature, precipitation and yield. Methods. Field and mathematical methods were used. Field multifactorial experiment was conducted during 2016–2018 in the Left Bank of Ukraine, on the border of two soil and climatic zones of Ukraine - Forest-Steppe and Polissya. Peculiarities of plant growth and development, formation of "hybrids" yield (factor A) were studied: 'Ukrainskyi F1', 'P63LL06', 'NK Brio', 'NK Ferti' depending on "plant density" (factor B): 50, 55 , 60, 65 thousand pieces/hectare. We calculated and analyzed the sums of active, effective temperatures for two biological minima - 5 and 10 ° C; the sum of thermal units according to the method of Brown and Bootsma, 1993; coefficients of materiality of elements deviations of the agrometeorological mode of the current year from long-term averages; plasticity and yield stability according to the method of Eberthart S.A., Russel W.Q. (1966). Results. To pass the full cycle of sunflower plants development, the sum of active temperatures (t = 10 °C) for hybrid 'Ukrainskyi F1' – 2354.6; P63LL06 – 2306.4; 'NK Brio' – 2401.3; 'NK Ferti' – 2379.7; and the sum of effective temperatures for 'Ukrainskyi F1'- 1081.5; 'P63LL06' – 1056.9; 'NK Brio' – 1104.9; 'NK Ferti' – 1109.1 is required. The sum of temperatures, both at a biological minimum temperature 10 °C and 5 °C, meet biological needs of sunflower plants and is not a limiting factor for this crop growing. The sum of thermal units for the period April–October is 3780 on average for three years. During the period of active sunflower vegetation (April–August) the sum of thermal units is 2868–3258, significantly exceeding the sum of active and effective temperatures at biologically active temperatures 5 °С and 10 °С. The most determined limits of changes in active, effective temperatures and thermal units were observed in May – September. Conclusions. Plasticity and stability of sunflower yield more depending on hybrid and plants density than on conditions of the year. Yield stability coefficient for hybrid 'Ukrainskyi F1' was 1.68 - 2.30; 'P63LL06'- 2.51 - 3.14; 'NK Brio'- 3.15 - 4.63; 'NK Ferti' - 2.70 - 3.75 for yields, respectively: 2.16 - 3.11; 2.58 - 3.52; 3.20 - 4.12; 2.70 - 3.79 t/ha.

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