The yields result of different varieties winter wheat in four State variety testing station of Cherkassy region is shown. Most ecological plastic varieties are determined.

The article presents agronomic and biological characteristics of new winter wheat cultivar Myrlyena. Pedigrees of its components of crossing are given.

In the Forest Steppe Zone of Ukraine studied 6 sorts and 3 hybrids of sweet com. According with results of research work the author came to the conclusion that sorts and hybrids distinguished some economic- important characteristics.

Morphological and cultivation value characteristics description of new perspective ornamental peach varieties bred in Nikita Botanical Gardens has been given. The varieties were bred as a result of using genoplasm Persica vulgaris Mill, varieties with different type of flower, P. mira (Koehne) Koval, et Kostina and Amygdalus communis L. They differ in high ornamental idices in flowering period and in bioecilogical indexes.

Creation of Initial raw for breeding of winter wheat by change of the development type under low temperatures influence was described. Seeds of spring wheat were vernalized in aluminum weighting bottle. By using low temperatures at sawing of M2-6 at the begin ind of optimal terms of sawing of winter wheat, new winter-hardy variety of Voloshkova was bred.

Development of the Variety Research Network under the State System on Right Protection for Plant Varieties during centuries of XX- XXI, was described in the article. On the comprehensive level, main problems and the ways to their solving were determined, a role of the State Service on Right Protection for Plant Varieties in settling of the problem of State food security was demonstrated.

Data on the fruits quality of the hybrid peach forms in NBG-NSC is given. Variability, correlation and regression dependence between attributes determining consumption quality of fruits are shown. Forms of peach with high quality of fruits are і dentifled.

Varietal supply with fodder crops of Ukraine’s market and DUS-test of new varieties of plants in 2006 on their suitability for dissemination were analyzed in the article.

The paper covers results of studying entries of winter wheat competitive strain test for adaptive traits and characteristics of new high producing, winter-hardy cultivar Kolos Myronivshchyny.

Підтверджена теорія генетичного балансу М.В. Турбіна в поясненні гетерозисного ефекту, яка ґрунтується на сумарному впливі різнонаправлено діючих адитивних і неадитивних ефектів генів батьківських форм. Гетерозисний ефект кращих гібридів становив 6,3- 10,4 % .