[Investigation of morphogenesis of inflorescence and determination of the nature of inheritance of "supernumerary spikelets" trait of bread wheat (Triticum aestivum L.) mutant line].

Using C-banding and FISH methods, the karyotype of MC1611 induced mutant of bread wheat, which develop additional spikelets at a rachis node (trait "supernumerary spikelets") was characterized. It was determined that the mutant phenotype is not associated with aneuploidy and major chromosomal rearrangements. The results of genetic analysis showed that supernumerary spikelets of the line are caused by a mutation of the single bh-D.

[Specific features of fertility restoration in alloplasmic lines obtained based on hybridization of self-fertilized offspring of barley-wheat (Hordeum vulgare L. x Triticum aestivum L.) amphiploid with common wheat varieties Saratovskaya 29 and Pyrotrix 28].

The problems of fertility restoration in the progeny of barley-wheat hybrids (H. vulgare x T. aestivum) are explained by incompatibility between the cytoplasm of cultivated barley and the nuclear genome of common wheat.

[A cytogenetic study of the blue-grain line of the common wheat cultivar Saratovskaya 29].

The chromosome composition of the blue-grain line i:S29Ba of the cultivar Saratovskaya 29 was identified by cytological, GISH, and microsatellite analyses and C-banding. It was found that common wheat chromosome 4B of the cultivar Saratovskaya 29 was substituted with the Agropyron elongatum Host. chromosome carrying the gene for blue grain (s:S294Ag(4B)) during the construction of this nearly isogenic line.

[Chromosome synteny of the A genome of two evolutionary wheat lines].

In order to estimate synteny between A(t) and A polyploid wheat genomes belonging to different evolutionary lines (Timopheevi and Emmer), saturation of chromosome maps of Triticum timopheevii A(t) genome by molecular markers has been conducted. Totally, 179 EST-SSR and 48 genomic SSR-markers have been used with the following integration of 13 and 7 markers correspondingly into chromosome maps of A(t) genome. EST-SSR showed higher transferability and lower polymorphism than genomic SSR markers.

[Features of the regulation of meiotic restitution in androgenic haploids of wheat-rye substitution lines 2R(2D)1, 2R(2D)3, and 6R(6A) (Triticum aestivum L., cultivar Saratovskaya 29/Secale cereale L., cultivar Onokhoiskaya)].

Regulation of meiotic restitution in androgenic haploids generated by cultivation of isolated pollinators of three wheat-rye substitution lines 2R(2D)1, 2R(2D)3, and 6R(6A) (Triticum aestivum L., cultivar Saratovskaya 29/Secale cereale L., cultivar Onokhoiskaya) was studied.

[Production of wheat-rye substitution lines based on winter rye cultivars with karyotype identification by means of C-banding, GISH, and SSR markers].

The study presents a continuation of the research aimed at producing of wheat-rye substitution lines based on the cross (Triticum aestivum L. x Secale sereale L.) x Triticum aestivum L.

[Production of wheat-rye substitution lines and identification of chromosome composition of karyotypes using C-banding, GISH, and SSR markers].

Based on the cross (Triticum aestivum L. x Secale cereale L.) x T.

[Molecular analysis of the triticale lines with different Vrn gene systems using microsatellite markers and hybridization in situ].

Hexaploid triticale (x Triticosecale Wittmack) lines were examined using molecular markers and the hybridization in situ technique. Triticale lines were generated based on wheat varieties differing by the Vrn gene systems and the earing times. Molecular analysis was performed using Xgwm and Xrms microsatellite markers with the known chromosomal localization in the common wheat Triticum aestivum, and rye Secale cereale genomes.

[The effect of rye chromosomes on callus induction and regeneration in callus cultures of immature embryos of wheat-rye substitution lines, Triticum aestivum L. cultivar Saratovskaia 29/Secale cereale L. cultivar Onokhoiskaia].

The effect of individual rye chromosomes on the induction of callus and the character of its regenerating capacity was studied with cultured immature embryos of wheat-rye (Triticum aestivum L. cv. Saratovskaya 29-Secale cereale L.

[Comparative effects of rye chromosomes 1R and 5R on androgenesis in cultured anthers of wheat-rye substitution lines dependending on the line origin].

The effects of rye chromosomes 1R and 5R on androgenesis in cultured anthers of wheat--rye substitution lines was studied as dependent on the cultivar origin of the rye chromosomes and on the wheat genome (A or D) subjected to substitution. Chromosome 1R stimulated embryogenesis in anther cultures, while chromosome 5R suppressed it regardless of whether the corresponding wheat chromosomes were substituted in the A or D genome. The effect of chromosome 1R on embryogenesis proved to depend on its cultivar origin.