variability

For field experiments  in an effort to elucidate functions  of the wheat lectin (wheat germ agglutinin, WGA), the establishment of varieties sharply  contrasting in the lectin content is  very  important. As  the starting point for solution of this  problem we studied the WGA variability  in the seeds  of 33 spring wheat varieties  obtained in two different breeding centers: Saratov's  and Kharkov’s  those. The vari­ ability  in response to environment for Saratovskaya 29 was  also estimated.

The article presents the results of studying the combination ability of new dihaploid maize lines created by diploidization of haploid plants obtained using a haploinducer line. The experiment involved simple hybrids (30 combinations) obtained according to the complete diallel scheme of 6 homozygous lines. The eff ects of GCA and variance of SCA lines, as well as the components of genetic variance in terms of the main morphometric parameters of the plant (stem length, ear height, panicle length, stem diameter, plant leaf surface area) were revealed.

Delphinium pubiflorum grows sparsely in the meadow-steppe forbgrass-shrub community on carbonate chernozem fairly rich soil. Habitat conditions correspond to moderately variable meadow-steppe hydration. The spatial structure of populations of non-uniform: there are a multitude of plants and detached instances; population density was approximately 7–8 plants per 100 m2.

The results of researches of 7 coenopopulations of North American invasivespeciesHordeumjubatumL.(Poaceae)inthe Trans-Urals of the Republic of Bashkortostan. Hordeum jubatum spreads on the steppe zone of the region. It dominates over other plants and it is share of participation in the community is 45,5–60,5%. The density of grass invasive species – 9–18 plants per 1 m2.Each plant produces 35 to 68 shoots, on average, is more than 600 shoots per 1 m2. The biomass of the type is no more than 0.25 kg/m2. Seed production is 39–54 pcs.

The peculiarities of adaptation and variability of Salix alba L. at the morphological level were studied in extreme natural and technogenic conditions of the Southern Urals. It was found that Salix alba is characterized by a wide ecological valence, and in terms of morphological variability – is stable morphological structure. The influence of geographical, climatic and anthropogenic factors on the level of morphological integration of Salix alba was revealed.