Main directions and results of Research on genetic diversity of maize in China and their practical use in breeding are represented.

The article revealed the attempt to open the ways of State food security and the role of State support forming the national varieties resources.

The use of regression analysis for estimation of inbred lines is a breeding - oriented method, as it indicates scientifically grounded stages of the further breeding studying of these lines and a strategy of their use. Admissible levels of inbred depression of agriculturally valuable characters are limited in lines of the Verkhnyachka and Lgov geneplasms by two - three generations of self - pollinations, which testifies to the necessity "to keep" the characters of sufficient basis. Linearity of changes of values of the characters with the advancing of inbreeding shows the absence of epistasis or the weakness of their effects which makes suitable the use of an additive-dominant model for determining breeding-genetical value of inbred lines with the aim of their purposeful hybridization for obtaining genetically determined heterosis in F1.

It is presented brief description of Wild Strawberry varieties included to State Register of Plant Varieties, which are applied for extension in Ukraine in 2006, as well as morphological and biological features of the plant and its value.

The cost-effectiveness of examination institutions activity of the State System on Plant Variety Protection was developed on the macro level. At the present stage there is an urgent necessity to provide with general methods to solve the tasks of the state scientific-technical program of plant variety examination.

The influence of different conditions of conservation to sprout and germinating power of seed varieties of wheat under conditions of conservation are expounded in the article.

In the article the importance of the creation of the State Service on Right Protection for Plant Varieties as Governmental body of the state management in the sphere of right protection for plant varieties was grounded, as well as strategic tasks and ways for development of this Service. The main principles for the realization of the national policy in the sphere of the right protection for plant varieties according to the international requirements are formed.

It was marked out the correlating the feature's groups of sample’s collection of melon with two levels of correlation (r ? 0,50 і r ? 0,75), which give the possibility to assess the samples by one of the feature that facilitates significantly the analysis of information in the collection of the seed-plot.

It’s been shown the ways user impotent nucleotide plant of soybean, agriculture growing in the world last years. Revealed main point of formation nationality plant varieties resource of soybean.

The cost-effectiveness of examination institutions activity of the State System on Plant Variety Protection was developed on the macro level. At the present stage there is an urgent necessity to provide with general methods to solve the tasks of the state scientific-technical program of plant variety examination.