[Genealogical Analysis of the Use of Two Wheatgrass (Agropyron) Species in Common Wheat (Triticum aestivum L.) Breeding for Disease Resistance].

During the last 80 years, in order to increase the genetic variability of wheat, translocations containing nine elongated wheatgrass (Agropyron elongatum) and eight intermediate wheatgrass (Agropyron intermedium) genes, which control resistance to pathogens, were transferred to this crop culture. Genealogical and statistical analysis of 1500 varieties developed using the wheatgrass gave evidence of the continuing increase in the proportion of such varieties in the total number of wheat varieties over the last half-century. Translocations from Ag.

[Genetic architecture of grain protein content in wheat].

Studies on identification and localization of quantitative traits for grain protein content (QGpc-loci) on chromosomes in Triticum aestivum and Triticum durum are reviewed. Association of QGpc with various traits of morphology, physiology, adaptation and tolerance to abiotic and biotic stressors is shown. Genetic and environmental QGpc contexts that should be taken into account when using molecular markers in breeding for the grain protein content are considered.

[Transmission of 5R chromosomes via gametes and its influence on spring bread wheat somatic embryoidogenesis in vitro].

Transmission of chromosomes 5R and 5A via gametes and its effect on somatic embryoidogenesis have been studied with the use of the model 5R(5A) substitution line L2837 = L503/Secale cereale L., cultivar Saratovskaya 5/L503, where L503 is a cultivar of spring bread wheat. It has been found that the frequencies of transmission of univalent chromosomes 5R and 5A determined in experiments on F1 reciprocal hybrids with cultivar Saratovskaya 29 do not reflect their frequencies in the self-pollinated offspring of F1 hybrids; the frequency of transmission of chromosomes 5R and 5A depends on the genotypes of both the recipient cultivar and the donor rye cultivar; and the 5R(5A) substitution in cultivar L503 significantly increases the parameters of somatic embryoidogenesis in vitro in explants from inflorescences.

[Identification of an alien chromosome in the common wheat line multi 6R].

The chromosome of Agropyron intermedium (Host) Beauv. substituting chromosome 6D has been identified in the karyotype of the Triticum aestivum L. line Multi 6R with the use of C-banding.

[The effect of Lr19-translocation on in vitro androgenesis and inheritance of leaf-rust resistance in DH3 lines and F2 hybrids of common wheat].

Leaf-rust resistance and androgenesis were studied in the anther cultures of Triticum aestivum L., which included Saratovskaya 29 cultivar, the isogenic line Ps29, and three F1 hybrids (L503/S55, L504/S58, ATS7/L1063) with 7DS-7DL-7Ae#1L translocation of Lr19 gene (Lr19 translocation) from Agropyron elongatum (Host) P.B.