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 % .

Influence of harvesting ways of spring brewer’s barley on grain crop capacity and quality has been examined. It has been established that in order to get good quality grain and timely harvesting all yield along with direct combine operator usage, application of separate way during grain humidity is acceptable.

З метою прогнозування небезпеки вилягання посівів розроблено і виготовлено апаратуру для визначення міцності соломини у фазах трубкування і колосіння. Наведено результати випробувань розробленої апаратури та її практичного використання.

In the collection initial material of china squash we found the variety from China Zoria Schodu (Star of Orient) with short length of stem. It is the new genetical donor for the breeding «bush» varieties. Inheritance length of stem in china squash is dominant.

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.

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.

The research held in the Central Polissya Zone show that the productivity and quality of the harvest derived from the new species Kamenyar and Irma depend strongly on the optimal setting of the sowing and fertilization norms. The results of the two-year-long research testify high crops of Kamenyar, which yields by its quality to Irma.