[Intergenomic chromosome substitutions in wheat interspecific hybrids and their use in the development of a genetic nomenclature of Triticum timopheevii chromosomes].

The results of analysis of the genome formation in interspecific hybrids of Triticum aestivum with T. timopheevii are reviewed. The spectra of substitutions and rearrangements are shown to depend on the genotypes of the parental forms and on the direction of selection.

[Comparative cytological and molecular analysis of introgressive common wheat lines containing genetic material of Triticum timopheevii Zhur].

A total of 40 introgressive lines of common wheat (2n = 42) Triticum aestivum L x T. timopheevii Zhuk., resistant to brown rust and partly to powdery mildew, were examined.

[A search for high-molecular-weight subunits of glutenin from Triticum timopheevi Zhuk. in the lines of common wheat (Triticum aestivum L. x Triticum timopheevi Zhuk.)].

The study is a continuation of investigation of prolamins in brown rust-resistant introgressive lines of common wheat, produced with participation of Triticum timopheeevi Zhuk. Two wheat lines with a substitution of the Glu-1 loci of T. timopheevi were identified.

[A study of the storage proteins in the introgression lines of common wheat (Triticum aestivum L. x T. timopheevii Zhuk.) resistant to brown leaf rust].

Storage proteins, prolamins, were studied in ten introgression lines of common wheat bred with involvement of Triticum timopheevii Zhuk. and five commercial hexaploid wheat cultivars. The lines are resistant to leaf rust.

[Genetic analysis and location of loci controlling leaf rust resistance of introgressive Triticum aestivum x Triticum timopheevii].

Introgressive lines resulting from crossing common wheat Triticum aestivum with the tetraploid T. timopheevii are characterized by effective resistance to leaf rust caused by Puccinia triticina Eriks. Molecular analysis using 350 specific short sequence repeat (SSR) markers was used to locate the T.

[Effect of substituting chromosome 5A with an supernumary chromosome 5B in offspring of a somaclonal common wheat line monosomic for 5A].

Cytogenetic analysis was employed in studying the cause of generation of fertile awned forms in the progeny of plants, which were selected from a speltoid somaclonal wheat line monosomic for chromosome 5A (2n = 41 = 20II + I), had speltoid spikes, and were reproduced by self pollination. On cytogenetic and genetic evidence, chromosome 5A was eliminated and the copy number of chromosome 5B increased in the plants examined. The appearance of an extra chromosome 5B is probably caused by nondisjunction of bivalent 5B in the presence of a telocentric originating from the long arm of chromosome 5A.

[Molecular analysis of leaf-rust resistant introgression lines obtained by crossing hexaploid wheat Triticum aestivum with tetraploid wheat Triticum timopheevii].

Twenty-four Triticum eastivum x T. timopheevii hybrid lines developed on the basis of five varieties of common wheat and resistant to leaf rust were analyzed by the use of microsatellite markers specific for hexaploid common wheat T. aestivum.

[Populations of higher plants found in the area of influence of the Semipalatinsk proving grounds].

Population of Scotch pine and crested wheat grass growing on the territories of Semipalatinsk testing ground and contaminated during the traits of nuclear weapon, and in the control region differ by a number of genetic and cytogenetic trials. Besides, it is evident that the investigation of the nature of genetic anomalies and their association with radiation factors in the problem more complicated than merely to recognize the fact of their availability. This calls for further investigations.

General features of chromosome substitutions in Triticum aestivum x T. timopheevii hybrids.

Based on a C-banded chromosome analysis of Triticum aestivum x T. timopheevii hybrid lines, we developed a classification of the A(t) and G genome chromosomes that agrees with the standard genetic nomenclature of T. aestivum chromosomes.