A tendency towards leaf rust resistance decrease in common wheat introgression lines with genetic material from Aegilops speltoides Tausch

Плотникова, Л. Я.; Meshkova, L. V.; Гультяева, Е. И.; Митрофанова, О. П.; Lapochkina, I. F.

doi:10.18699/vj18.395

Cited by 8 publications

(5 citation statements)

References 14 publications

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“…Taking into account the general trend of increasing harmfulness of rust diseases in the world, we conducted annual monitoring of leaf rust development on collection nursery in Western Siberia in 2011-2018. During the observation period (excluding arid 2012), there was an intensive disease development in the region, with the damage of susceptible bread wheat varieties reaching 70-100 % [14]. To test the stability of the resistance of T. timopheevii to leaf rust, the reaction type to infection at different stages of plant development was evaluated (the data 2011, 2014, and 2018).…”

Section: Resultsmentioning

confidence: 99%

“…At present, this disease poses a threat to food security in different regions of the world [16]. In the recent decade, an increase in the harmfulness of wheat leaf and stem rusts has been noted in Western Siberia [3,14]. A previous study of the reactions of common wheat lines with known resistance genes introgressed from different related species showed that virulence for resistance genes that absent in the commercial wheat strains appeared in the West Siberian population of P. triticina [17].…”

Section: Discussionmentioning

confidence: 99%

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Prospects of Using of Genetic Potential of Triticum timopheevii for Durable Defense of Common Wheat from Leaf Rust

Plotnikova¹,

Pozherukova²,

Novikova³

et al. 2020

Proceedings of the International Scientific Conference the Fifth Technological Order: Prospects for the Development and Moderni

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Common wheat is the main grain crop in Russia. In the last decade, the development of leaf rust caused by the pathogenic fungus Puccinia triticina Erikss on the wheat was enhanced. To increase grain production and obtain environmentally friendly products, it is necessary to use varieties resistant to disease. Common wheat is cultivated over large areas in Western Siberia. In this region an aggressive Asian population of P. triticina, differed from the European one, exists on the crops. For durable defense of varieties from rust diseases, it is necessary to enrich the wheat genome with new resistance genes from the related cereals. The rare species Triticum timopheevii Zhuk. is considered a promising issue of resistance to fungal diseases, but its immunity has been confirmed mainly in the European part of Russia and in North America. The aim of the work was to monitor the resistance of T. timopheevii to leaf rust in Western Siberia and to determine the promising accessions for breeding programs. The adult resistance of T. timopheevii accessions was evaluated in the field conditions on intensive infectious background in 2011-2018 in the South of Western Siberia (Omsk). Additionally the reactions of seedlings to infection were estimated in laboratory. Damage of the plants by leaf rust was characterized by type, score/ percentage. The tendency to shift the type of seedling reaction from immune to susceptible was shown. Beside it the regular weak damage of adult plants of some T. timopheevii specimens was noted in the field in 2014-2018. Among a set of T. timopheevii accessions the promising specimens were determined with stable resistance to the Asian population of P. triticina, which are suitable for breeding programs. The work has begun to include the resistant accessions in the breeding process.

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Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Prospects of Using of Genetic Potential of Triticum timopheevii for Durable Defense of Common Wheat from Leaf Rust

Plotnikova¹,

Pozherukova²,

Novikova³

et al. 2020

Proceedings of the International Scientific Conference the Fifth Technological Order: Prospects for the Development and Moderni

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“…Unfortunately, the genetic diversity of bread wheat for effective resistance to harmful fungal diseases is extremely low. Only five genes have been found to provide a high level of resistance to leaf rust in the Russian Federation [18,19], and they have now been reported to have lost their effectiveness in some regions of Russia [22][23][24][25][26][27][28]. Only genes for resistance to Bgt Pm12, PmSp, and PmKu were described as effective against the pathogen populations from the northwestern part of the Russian Federation [29,30,58], but samples with these genes were found to be susceptible in 2022 [21].…”

Section: Discussionmentioning

confidence: 99%

“…Effective resistance to Pt in samples from the collection is only controlled by the genes Lr9 , Lr19 , Lr24 , Lr41 , and Lr47 [ 18 , 19 ], but the first three of these have long since lost their effectiveness in many parts of the Russian Federation [ 22 , 23 , 24 , 25 ]; virulence against Lr41 and Lr47 is now described in Russia with significant frequencies [ 26 , 27 , 28 ]. No bread wheat accession from the VIR collection exhibited high resistance to SNB and HLB [ 18 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

Genetic Diversity for Effective Resistance in Wheat Landraces from Ethiopia and Eritrea to Fungal Diseases and Toxic Aluminum Ions

Zuev,

Lebedeva,

Yakovleva

et al. 2024

Plants

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To reveal genetic diversity for effective resistance to five foliar diseases and toxic aluminum ions, the entire collection of wheat species from the N.I. Vavilov All-Russian Institute of Plant Genetic Resources (VIR) originating from Ethiopia and Eritrea were studied regarding their traits. The collection contains 509 samples of four wheat species (Triticum aestivum—122 samples; T. aethiopicum—340 samples; T. polonicum—6 samples; and T. dicoccum—41 samples). The majority of accessions are new entries of landraces added to the Vavilov collection as a result of the Russian–Ethiopian expedition in 2012. Wheat seedlings were inoculated with causal agents of leaf rust (Pt), powdery mildew (Bgt), Septoria nodorum blotch (SNB), and dark-brown leaf spot blotch (HLB). The types of reaction and disease development were assessed to describe the levels of resistance. All samples of T. aethiopicum were also screened for seedling and adult resistance to Pt, Bgt, and yellow rust (Pst) under field conditions after double inoculation with the corresponding pathogens. To study tolerance to abiotic stress, seedlings were grown in a solution of Al3+ (185 µM, pH 4,0) and in water. The index of root length was used to characterize tolerance. Seedlings belonging to only two accessions out of those studied—k-68236 of T. aethiopicum and k-67397 of T. dicoccum—were resistant to Pt at 20 °C but susceptible at 25 °C. Specific molecular markers closely linked to the five genes for Pt resistance effective against populations of the pathogen from the northwestern region of Russia were not amplified in these two entries after PCR with corresponding primers. Four entries of T. dicoccum—k-18971, k-18975, k-19577, and k-67398—were highly resistant to Bgt. All samples under study were susceptible to HLB and SNB. Under field conditions, 15% of the T. aethiopicum samples were resistant to Pst, both at the seedling and the flag leaf stages, but all were susceptible to the other diseases under study. Among the evaluated samples, 20 entries of T. aestivum, 1 of T. polonicum (k-43765), and 2 of T. dicoccum (k-18971, k-67397) were tolerant to aluminum ions. The identified entries could be valuable sources for the breeding of T. aestivum and other wheats for resistance to biotic and abiotic stresses.

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“…Научные интересы Ольги Павловны сосредоточены на исследовании генетических ресурсов пшеницы (Mitrofanova, 2012;Mitrofanova et al, 2016), направленном на выявление особенностеи� эволюции рода Triticum L. (Dragovich et al, 2009;Riaz et al, 2016;Novoselskaya-Dragovich et al, 2018;Badaeva et al, 2018;Temirbekova et al, 2019), на оценку генетического разнообразия пшеницы (Fadeeva et al, 2020;Fadeeva et al, 2022), на выявление особенно-стеи� наследования селекционно значимых признаков (Plotnikova et al, 2018;Riaz et al, 2018;Lysenko et al, 2019;Zverev et al, 2020;Shcherban et al, 2021;Gultyaeva et al, 2022), на маркирование ценных генов и разработку тех-нологии� маркер-контролируемого отбора (совместно с лабораториеи� молекулярнои� селекции и ДНК-паспортизации) (Porotnikov et al, 2020;Porotnikov et al, 2022a;Porotnikov et al, 2022b), на изучение линии� , созданных от скрещивания мягкои� озимои� пшеницы с рожью (Pyukkenen et al, 2019), и линии� синтетическои� гексаплоиднои� пшеницы (Khakimova et al, 2019;Khakimova et al, 2021).…”

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Olga P. Mitrofanova (celebrating the 75<sup>th</sup> birthday)

Зуев

Lyapunova

Хлесткина

2023

Trudy po prikladnoy botanike, genetike i selektsii

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A tendency towards leaf rust resistance decrease in common wheat introgression lines with genetic material from Aegilops speltoides Tausch

Cited by 8 publications

References 14 publications

Prospects of Using of Genetic Potential of Triticum timopheevii for Durable Defense of Common Wheat from Leaf Rust

Prospects of Using of Genetic Potential of Triticum timopheevii for Durable Defense of Common Wheat from Leaf Rust

Genetic Diversity for Effective Resistance in Wheat Landraces from Ethiopia and Eritrea to Fungal Diseases and Toxic Aluminum Ions

Olga P. Mitrofanova (celebrating the 75<sup>th</sup> birthday)

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