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Triticum miguschovae, a genome addition synthetic, was used as a source for transfer of leaf rust (Puccinia recondita tritici) resistance to common wheat. This synthetic, developed from two wild species Triticum militinae and Aegilops squarrosa, proves a valuable donor of the genes for leaf rust resistance. Leaf rust resistance was transferred from T. miguschovae by both dominant and recessive genes. Stable lines phenotypically similar to their recurrent parents Kavkaz and Bezostaya 1 but differing from them in a high level of leaf rust resistance were obtained. The genes for resistance in 3 selected lines differed from each other and from the known effective genes Lr9, Lr19, and Lr24. The resistance of one of them (line 1229) is controlled by two complementary interacting genes located on chromosomes 7B and 1D was revealed by monosomic analysis.

Wheat accessions were genotyped with molecular markers linked to wheat leaf rust resistance genes Lr9, Lr10, Lr19, Lr24, Lr26, Lr34, and Lr37. They included 1920 wheat plants and 46 commercial varieties bred at the Lukyanenko Institute. Basically, the analyzed varieties had the inefficient gene Lr10, poorly efficient Lr26 and Lr34, or their combinations. The highly efficient genes Lr9 and Lr24 were not detected. The Lr19 gene, effective in the Krasnodar region, was identified in varieties Pallada and Yara. The resistance gene Lr37 was found in the Morozko variety. Within a short time, the F 2 and F 3 plants with the introgression of genes Lr9, Lr19, Lr24, and Lr37 were obtained. Accessions with combinations Lr24 +Lr37, Lr24 + Lr19, Lr24 + Lr9, Lr19 + Lr37, Lr37 + Lr9, and Lr19 + Lr9 were identified. Seven plants with the combination of three genes Lr37 + Lr19 + Lr9 and one with Lr37 + Lr24 + Lr9 were selected.

Diploid wild relative of wheat -Aegilops speltoides -is a valuable source of genes for resistance to diseases. The synthetic form Avrodes (BBAASS) was used as a bridge to transfer leaf rust resistance genes from Ae. speltoides to common wheat. Introgression lines obtained from crosses of Avrodes and susceptible common wheat cultivars were evaluated in a field leaf rust nursery. Resistance levels varied from high to moderate. Testing of lines with the use of molecular markers has shown that some lines have the Lr28 and Lr35 genes inherited from synthetic form Avrodes. The majority of resistance lines have not been found to carry these genes. The Lr47 and Lr51 genes were not identified in the Avrodes and introgression lines. The analysis of chromosome pairing in F 1 hybrids showed that the transfer of a genetic material from Avrodes to common wheat basically occurs through translocations. Lines with translocations on chromosomes 2D and 5D were identified by C-banding and FISH. The translocations differed in chromosomal location from known leaf resistance genes transferred to common wheat from Ae. speltoides. Hence it was assumed that new genes were introduced into the common wheat genome from Ae. speltoides. Introgression lines have been studied for productivity and technological qualities of grain. Lines AA60n9 and D37n10 combine high resistance to leaf rust with good characteristics of productivity and technological qualities of grain. The received results demonstrate a genetic diversity and a value of the investigated introgression lines for breeding of common wheat.Key words: Triticum aestivum; Aegilops speltoides; introgression lines; resistance to leaf rust; cytological analysis; molecular markers; productivity and technological qualities of grain.Диплоидный сородич мягкой пшеницы Aegilops speltoides является ценным источником генов устойчивости к болезням. Для передачи от этого вида мягкой пшенице устойчивости к листовой ржавчине в качестве «мостика» была использована синтетическая форма Aвродес (BBAASS). Оценка 115 Triticum aestivum/Авродес интро-грессивных линий выявила их различие по устойчивости к листо-вой ржавчине -от среднеустойчивых до высокоустойчивых. Тес-ти рование интрогрессивных линий с помощью молекулярных мар керов показало, что отдельные линии имеют гены устойчиво-сти Lr28 и Lr35, наследуемые от синтетической формы Авродес. В то же время у большей части устойчивых линий их присутствие не было выявлено. Анализ мейотической конъюгации хромосом F 1 гибридов показал, что генетический материал от синтетической формы Авродес передается в основном посредством транслока-ций. С использованием методов C-окрашивания и FISH идентифи-цированы линии с транслокациями на хромосомах 2D и 5D. Ни один из переданных ранее генов устойчивости от Ae. speltoides не имеет локализацию на хромосомах 2D и 5D. Таким образом, можно предположить передачу новых генов устойчивости к листовой ржавчине от Ae. speltoides мягкой пшенице. Проведено изучение интрогрессивных линий по продуктивности и технологическим характеристика...