The research of 122 breeding lines of winter wheat to adaptability have been carried out for three years at three points. Samples for ecological variety testing were determined which have both high and average stability and plasticity, high average yield and are promising for qualified examination. The environments are analyzed for differentiating ability. Environments were selected which allow to identify genotypes for yield potential and adaptive ability. It is established that the parameters of adaptive ability and stability of winter wheat samples obtained during cultivation both in various geographical locations and at one point during some years were closely correlated. This confirms the hypothesis that the genotype estimate for adaptive ability in one location is reliable. The connection level was average only for the variance of genotype–environment interaction. However, this parameter is not principal therefore this connection level does not restrict significantly the use of the method in general.

The results of evaluation and selection of breeding material of mixed germ-plasm corn for early ripeness among self-pollinated families S4 by the length of the «sprouting–flowering of 50% of ears» period are given. A signifi cant infl uence of weather conditions during the years of study on the length of this indicator was determined. Response of studied corn test-crosses on growing conditions are described. Self-pollinated families DK22282111, DK28211111, DK21511111, DK20192321, DK26143111 were singled out which had a high tolerance to growing conditions and stable «sprouting–flowering of 50% of ears» period.

There are allocated some forms of distant hybrids with weak degree of fungal diseases lesion (Taphrina deformans (Berk.) Tul., Sphaerotheca pannosa (Lev.) var. persicae Woron., Clasterosporium carpophilum Aderh., Monilia cinerea Bonord. и Monilia fructigena Fr.) that are of practical interest for breeding such cultivars of peach and nectarine that will resist these pathogens.

The effect of sowing time on realization of the natural productivity potential of modern soft winter wheat varieties was studied. It is established that the use of current agricultural technologies in a context of climate change has caused shift of calendar sowing terms to the second half of the optimal terms comparing with earlier cultivated varieties. In subzones of Kirovohrad and Bila Tserkva state variety testing stations the highest yield of winter wheat is formed in case of sowing on September 20–30, but the optimum for Kirovohrad station fall on September 30, Bila Tserkva station – on September 20 and 30. Sowing in earlier or later time leads to decreasing yields, especially of Vynnychanka, Smuhlyanka, Zolotokolosa and Tripilska varieties. Bogdana and Kuialnyk varieties are the most adaptive to sowing time under agroecological conditions of Kirovohrad state variety testing station.

У досліді вивчали формування селекційних індексів сортів пшениці озимої в різних умовах середовища в роки з ранньою та пізньою весняною вегетацією. Рання або пізня вегетація – це стресовий чинник для генотипу, і, безумовно, в технології селекційного процесу важливо знати, як впливають стресові чинники на формування та мінливість селекційних індексів. За результатами досліджень встановлено, що в стресових умовах середовища під час доборів на потенціал урожаю на ранніх етапах селекції можна використовувати такі селекційні індекси, як збиральний та індекс лінійної щільності колосу, які можуть бути використані як маркерні ознаки.

Yield of modern varieties of valuable fodder crop lucerne is quite low - 0.2 - 0.3 t / ha. The reason - lack of cross-pollination due to the lack of insect pollinators. Under these conditions, the highest seed production plants are prone to selfpollinate. The results of the study of 26 new selffertile samples of alfalfa own selection. It was shown that 15 samples for seed yield higher than standard - grade Jaroslavna. The herbage yield of only four samples was lower than in the standard. The dry matter content of all samples was high - 22,1-25,5 %. The results obtained are allowed to select in hotbed of pre-strain testing samples with high levels of self-fertility, seed yield 0,24-0,29 t/ha, herbage for three mowing - 63,2-67,7 t/ha, high dry matters content, which will be used in future breeding process

100 rape varieties and hybrids of domestic and foreign selection that have been grown in the different soil-climatic zones of the country were evaluated. The paper presents the results of study by their biochemical characteristics: content of protein, oil and its fatty acid composition. High-oil varieties of rape are identifi ed with high content of erucic acid in oil – for the technical purposes and those without or with its low content – for food industry.

Results obtained during the study of special features of cultivation and productivity of soft winter wheat varieties that differ by origin in the Steppe zone in Ukraine are presented. Relevance of the executed work was determined by ambiguous assessment and selection of available soft winter wheat variety assortment that is used in Steppe zone farms. Findings allow to find out  and expose to a greater extent unused reserves for increasing the croppage level. It was found in the process of the study that now according to comprehensive assessment the best varieties of a soft winter wheat for corn growers in the steppe zone are Smuhlianka, Epokha odes`ka, Kiriia, Zolotokolosa, Blahodarka odes`ka, Bohdana, Lyst 25, Rozkishna.

The article quotes data on fruits biochemical composition for 101 varieties of peach from Nikita Botanical Garden collection. 88 varieties have been singled out according to the composition of bioactive substances. Among those varieties the North China and Iran ecological and geographical groups prevail (52.3% and 37.5%, respectively).

Results of studying morphoagrobiological characteristics and properties of a new variety ofsoftwinterwheat Nyva Kyivschyny are presented. It is determined that it has high genetic productivity potential, belongs to intensive variety type of universal use, is characterized by high winter and drought hardiness. This variety realizes its natural potential in a greater degree in case of growing after the best forecrop, at high soil fertility, with intensive agrotechnologies implementation and sowing at the end of the optimal time for appropriate agroclimatic zones.