The results of research of the drought tolerance of winter wheat varieties (Triticum aestivum L.), which are suitable for the dissemination in Ukraine are presented. Differentiation of varieties according this trait is made. Groups of varieties were classified. Ways of improvement of the assessment are suggested.

Щиро вітаючи В. В. Моргуна з ювілеєм, успішним творчим життям, високою державною відзнакою, Державна служба з охорони прав на сорти рослин, Український інститут експертизи сортів рослин і редколегія журналу „Сортовивчення та охорона прав на сорти рослин” зичить йому високої наснаги, плідного творчого довголіття і приєднується до побажань авторів „Вік зрілості і мудрості” В. М. Маласая і В. М. Гаврилюка.

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.

Analysis of the existing methods for earliness group determination of maize varieties and hybrids according to the FAO indices was conducted. Influence of the abiotic factors on earliness of 16 standard maize hybrids in all agroclimatic zones of Ukraine at nine State Canters for Plant Variety Examination and State Variety Testing Stations during 1999-2006 was analyzed. On the base of the research results, a new method of earliness group determination for varieties (hybrids) of maize without comparison with the standard hybrids has been developed.

Crop capacity and productivity elements of winter wheat domestic sorts have been investigated. Valuable sources on the basis of given characteristics for getting selective material of high quality have been singled out. Correlation relations between crop capacity and productivity elements of winter wheat sorts have been established.

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.

The untypical weather conditions during the extrema drought in 1993- 1994 have been described. Regularities of the accumulation and spending of the dry substance in leaves of varieties, signi ficantly different in productivity, weke considered depending on weather conditions.

The study of vernalization requierement of winter bread wheat 87 modem varieties from Ukraine and Russia showed significant domination - 81.6% - of varieties with short vernalization requierement (30-40 days). Vernalization requierement differences among varieties from different climatic zones were revealed.

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.

The study of vernalization requierement of winter bread wheat 87 modem varieties from Ukraine and Russia showed significant domination - 81.6% - of varieties with short vernalization requierement (30-40 days). Vernalization requierement differences among varieties from different climatic zones were revealed.