Seedling and Adult Plant Stripe Rust Resistance in Diverse Wheat–Alien Introgression Lines

Rahmatov, Mahbubjon; Hovmøller, Mogens S.; Nazari, K.; Andersson, Staffan; Steffenson, Brian J.; Johansson, Eva

doi:10.2135/cropsci2016.08.0664

Cited by 13 publications

(17 citation statements)

References 54 publications

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“…For the stripe rust evaluations, 189 of the winter and 73 of the spring wheatalien introgression lines were tested in the seedling and adult plant stages. Twelve stripe rust races with different virulence/ avirulence combinations and geographic origins were used for screening at the seedling stage along with adult plant evaluations in the field according to Rahmatov et al (2017). Hysing et al (2007), evaluated a set of 2BS.2RL wheat-rye translocation lines against stripe rust, leaf rust, and powdery mildew races.…”

Section: Diseases Screeningmentioning

confidence: 99%

Diverse Wheat-Alien Introgression Lines as a Basis for Durable Resistance and Quality Characteristics in Bread Wheat

et al. 2020

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Wheat productivity has been significantly improved worldwide through the incorporation of novel genes from various gene pools, not least from wild relatives of wheat, into the commonly cultivated bread and durum wheat. Here, we present and summarize results obtained from a diverse set of wheat-alien introgression lines with mainly introgressions of rye, but also of Leymus spp. and Thinopyrum junceiforme into bread-wheat (Triticum aestivum L.). From this material, lines carrying 2RL were found with good agronomic performance and multiple resistance not least towards several races of powdery mildew. A novel resistance gene, one of few showing resistance towards all today identified stem rust races, designated Sr59, was also found originating from 2RL. Lines with multiple introgressions from 4R, 5R, and 6R were found resistant towards the majority of the stripe rust races known today. Due to lack of agricultural adaptation in these lines, transfer of useful genes into more adapted wheat material is a necessity, work which is also in progress through crosses with the CSph1b mutant, to be able to only transfer small chromosome segments that carry the target gene. Furthermore, resistance towards Russian wheat aphid was found in lines having a substitution of 1R (1D) and translocations of 3DL.3RS and 5AL.5RS. The rye chromosomes 1R, 2R, and 6R were found responsible for resistance towards the Syrian Hessian fly. High levels of especially zinc was found in several lines obtained from crosses with Leymus racemosus and Leymus mollis, while also some lines with 1R, 2R, or 5R showed increased levels of minerals and in particular of iron and zinc. Moreover, lines with 1R, 2R, 3R, and Leymus spp. introgressions were also found to have a combination of high iron and zinc and low cadmium concentrations. High variation was found both in grain protein concentration and gluten strength, measured as %UPP, within the lines, indicating large variation in bread-making quality. Thus, our study emphasizes the impact that wheat-alien introgression lines can contribute to current wheat lines and shows large opportunities both to improve production, resistance, and quality. To obtain such improvements, novel plant breeding tools, as discussed in this

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Section: Diseases Screeningmentioning

confidence: 99%

Diverse Wheat-Alien Introgression Lines as a Basis for Durable Resistance and Quality Characteristics in Bread Wheat

et al. 2020

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“…Inoculations with races of Pst were carried out on 14-day-old seedlings when the second leaves were fully expanded. For inoculations completed at the GRRC and RCRRC, Pst urediniospores were suspended in Novec Fluid (3 M Novec TM 7100 Engineered Fluid) and lightweight mineral oil, respectively (Rahmatov et al 2017). After inoculation, plants were moved to a dark chamber at 100% RH at 10°C for 24 h for the infection period.…”

Section: Seedling Rust Resistance Assaysmentioning

confidence: 99%

“…After inoculation, plants were moved to a dark chamber at 100% RH at 10°C for 24 h for the infection period. Thereafter, plants were incubated in a greenhouse at 18°C for 18 h during the day and 12°C for 6 h during the night, protocols routinely used at both the GRRC and RCRRC (Hovmøller et al 2017;Rahmatov et al 2017). After 16 days of incubation, stripe rust infection types were scored using a 0-9 scale as described by McNeal et al (1971).…”

Section: Seedling Rust Resistance Assaysmentioning

confidence: 99%

“…The stripe rust-infected leaves were collected in Tajikistan and sent to the GRRC for race analysis (Hovmøller et al 2017), and the race TJ01a/ 10 was detected and subsequently used at the seedling resistance test. To provide sufficient stripe rust infection in the nurseries at RCRRC, mixtures of susceptible wheat cultivars were used as spreader rows surrounding and between the plots (Rahmatov et al 2017). In Njoro and Minnesota, urediniospores of Pgt (TTKSK ?…”

Section: Seedling Rust Resistance Assaysmentioning

confidence: 99%

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Characterization of stem, stripe and leaf rust resistance in Tajik bread wheat accessions

et al. 2019

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Stem rust [causal organism: Puccinia graminis f. sp. tritici (Pgt)], stripe rust [Puccinia striiformis f. sp. tritici (Pst)], and leaf rust [Puccinia triticina (Pt)] are important fungal diseases of wheat in Central Asia and worldwide. Therefore, identification of seedling and adult plant resistance (APR) genes is of major importance for the national wheat breeding program in many countries. The objectives of this study were to identify genes that confer seedling and APR resistances in widely grown wheat cultivars, landraces and advanced lines from Tajikistan. A total of 41 wheat accessions were inoculated with eleven races of Pgt, twelve races of Pst and nine races of Pt for postulation of Sr (stem rust), Yr (yellow or stripe rust), and Lr Lr (leaf rust) resistance genes at the seedling stage. In addition, all of the accessions were tested in field trials for the response to stem rust and stripe rust. Genes for seedling stem rust resistance (i.e. Sr5, Sr6, Sr11, Sr31, and Sr38), stripe rust resistance (Yr9, Yr17, and Y27), and leaf rust resistance (Lr16 and Lr26) were postulated in the Tajik wheat. The presence of the pleiotropic APR genes Sr2/Yr30/ Lr27 (associated with pseudo-black chaff phenotype) and Lr34/Yr18/Sr57 (associated with leaf tip necrosis phenotype), and also Lr37 were assessed in the field and confirmed with linked molecular markers. In most of the wheat accessions, resistance genes could not be postulated because their infection types did not match the avirulence or virulence profile of the Pgt, Pst and Pt races tested. Six, seven, and nine accessions were identified that likely possess new genes for resistance to stem rust, stripe rust, and leaf rust, respectively, which have not been described previously. The research demonstrates the presence of effective seedling resistance and APR genes in widely grown wheat accessions that could facilitate further rust

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“…bessarabicum, Th. junceum, Agropyron elongatum Zheng et al, 2012), Secale cereale, Leymus rasemosus, L. mollis (Rahmatov et al, 2012). Ранее интрогрессивные озимые и яровые линии мягкой пше-ницы (Triticum aestivum L.) были созданы в Московском НИИСХ «Немчиновка» с привлечением видов Aegilops speltoides, Aе.…”

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Identification of Sr genes in new common wheat sources of resistance to stem rust race Ug99 using molecular markers

Баранова¹,

Lapochkina²,

Anisimova³

et al. 2015

Vestn. VOGiS

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Seedling and Adult Plant Stripe Rust Resistance in Diverse Wheat–Alien Introgression Lines

Cited by 13 publications

References 54 publications

Diverse Wheat-Alien Introgression Lines as a Basis for Durable Resistance and Quality Characteristics in Bread Wheat

Diverse Wheat-Alien Introgression Lines as a Basis for Durable Resistance and Quality Characteristics in Bread Wheat

Characterization of stem, stripe and leaf rust resistance in Tajik bread wheat accessions

Identification of Sr genes in new common wheat sources of resistance to stem rust race Ug99 using molecular markers

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