Article
Agronomy
Sylwia Sowa, Volker Mohler, Edyta Paczos-Grzeda
Summary: This study found that 39 populations of Avena strigosa from ten countries have complex resistance to crown rust and potentially other pathogens.
Article
Multidisciplinary Sciences
Sidrat Abdullah, Tyler Gordon, Belayneh Admassu Yimer, Edyta Paczos-Grzeda, Stephen A. Harrison, James G. Menzies, Kathy Esvelt Klos
Summary: This study aimed to locate Pc96 on the oat consensus map and develop SNP markers linked to Pc96 for marker-assisted selection in breeding programs. SNP loci linked to Pc96 were identified, and PACE assays were developed for marker-assisted selection. Pc96 is a race-specific crown rust resistance gene from cultivated oat deployed in North American oat breeding programs.
Article
Agronomy
Eric S. Nazareno, Jason Fiedler, Marisa E. Miller, Melania Figueroa, Shahryar F. Kianian
Summary: In this study, three adult plant resistance loci on oat chromosomes 4D and 6C were mapped and markers were developed for marker-assisted selection and gene pyramiding. The survey of gene content in these regions identified clusters of disease resistance genes that may contribute to adult plant resistance. This research is important for oat breeding and the cloning of resistance genes.
THEORETICAL AND APPLIED GENETICS
(2022)
Article
Plant Sciences
Tianya Li, Yiwei Xu, Xue Zhang, Xianxin Wu, Yazhao Zhang, Yuanhu Xuan, Shu Wang
Summary: This study investigated the virulence composition and dynamics of oat stem rust populations in China, as well as evaluated the resistance of oat cultivars. The results revealed a diverse range of virulence types, with TJD being the predominant race. Several races previously unknown in China were also identified. Additionally, the study identified several oat cultivars that exhibited high resistance at both seedling and adult plant stages.
Article
Biochemistry & Molecular Biology
Joanna Toporowska, Sylwia Sowa, Andrzej Kilian, Aneta Koroluk, Edyta Paczos-Grzeda
Summary: The study identified a highly effective monogenic crown rust resistance gene, Pc50-5, and confirmed its potential in oat breeding through an allelism test. Molecular markers tightly linked to the Pc50-5 gene were developed and converted into SCAR markers through PCR, providing a valuable tool for oat breeding programs.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Plant Sciences
Yunqian Wang, Cong Liu, Yuanyuan Du, Kunyan Cai, Yanfeng Wang, Jia Guo, Xingxuan Bai, Zhensheng Kang, Jun Guo
Summary: This study identifies a Pst effector, PstSIE1, that targets the immune component TaSGT1 and is involved in suppressing wheat defense. Overexpression of PstSIE1 increases the number of rust pustules and reduces the accumulation of reactive oxygen species (ROS).
Article
Plant Sciences
Arjun Upadhaya, Sudha G. C. Upadhaya, Robert Brueggeman
Summary: A diverse population of wheat stem rust exists in the Pacific Northwest region of the United States, and novel virulence gene combinations that could overcome existing resistances have been found. This study reports the first worldwide isolates of Puccinia graminis f. sp. tritici that are virulent on both Rpg1 and RMRL, representing the most virulent strains of this pathogen reported on barley.
Article
Biochemistry & Molecular Biology
Yanhui Zhang, Xiaofei Liang, Mengxin Zhao, Tuo Qi, Hualong Guo, Jing Zhao, Jie Zhao, Gangming Zhan, Zhensheng Kang, Li Zheng
Summary: We report a novel narnavirus, PsV5, from the devastating wheat stripe rust fungus. The PsV5 genome contains two predicted ORFs, an RdRp and a reverse-frame ORF with unknown function. Overexpression of PsV5 increases susceptibility to Pst in wheat and enhances virulence in Fusarium graminearum. These findings provide insights for sustainable wheat rust disease control and expand our understanding of virosphere diversity.
PLANT COMMUNICATIONS
(2023)
Article
Plant Sciences
Sylwia Sowa, Edyta Paczos-Grzeda
Summary: This study characterized the pathotype structure of Puccinia coronata in Poland, revealing high pathotype diversity among isolates collected from different regions and years. The virulence of P. coronata isolates varied significantly between locations and years, with some isolates being able to overcome certain oat differentials while displaying modest overall virulence levels. This information can be valuable for developing resistance breeding strategies and selecting effective major genes for incorporation into cultivars.
Article
Plant Sciences
Parimal Sinha, Xianming Chen
Summary: The study assessed the infection risk of barberry by stripe rust and stem rust pathogens in Asia and Southeastern Europe, with different levels of risk identified in different regions. The findings can guide monitoring and rust management programs in these areas, and the modeling framework used in the study may have broader applications in predicting rust infection risk in other regions.
Article
Multidisciplinary Sciences
Chunhong Chen, Matthias Jost, Megan A. Outram, Dorian Friendship, Jian Chen, Aihua Wang, Sambasivam Periyannan, Jan Bartos, Katerina Holusova, Jaroslav Dolezel, Peng Zhang, Dhara Bhatt, Davinder Singh, Evans Lagudah, Robert F. Park, Peter M. Dracatos
Summary: In this study, the researchers successfully isolated the barley leaf rust resistance gene Rph7 using a fine mapping and RNA-Seq approach. They found that Rph7 encodes a non-canonical resistance protein that is structurally different from known plant disease resistance proteins. The study also revealed that Rph7 may mediate the activation and strength of the basal defence response, highlighting its importance for disease control in crops.
NATURE COMMUNICATIONS
(2023)
Article
Agronomy
Edyta Paczos-Grzeda, Maja Boczkowska, Sylwia Sowa, Aneta Koroluk, Joanna Toporowska
Summary: The study revealed that wild oat accessions preserved in genebanks can be a valuable source of resistance to crown rust; pathogenicity testing showed that most oat varieties exhibited a complex infection pattern, while a small percentage were susceptible and another small percentage could be clearly identified as resistant.
Article
Plant Sciences
Kaveh Ghanbarnia, Ryan Gourlie, Eric Amundsen, Reem Aboukhaddour
Summary: This study investigated the virulence diversity and geographical distribution of the wheat stripe rust pathogen Puccinia striiformis f. sp. tritici population in Canada from 1984 to 2017. The results showed clear changes in pathogen virulence over time, with specific frequencies of virulence on different resistance genes, indicating the potential evolution of virulence/avirulence. Additionally, analysis revealed similarities between Canadian isolates and those from the United States, supporting long-distance migration of the pathogen and different wind trajectories in North America.
Article
Plant Sciences
Nicholas Greatens, Nick Klejeski, Les J. Szabo, Yue Jin, Pablo D. Olivera
Summary: Puccinia coronata var. coronata (Pcc) is a pathogenic fungus causing crown rust disease in two invasive plant species, glossy buckthorn and reed canarygrass, in North America. It is closely related to major pathogens of cereals, turfgrasses, and forage grasses. Our research mapped the distribution of Pcc, described the signs and symptoms of the disease, and analyzed the morphology of the pathogen. Through surveys and correspondence with users of iNaturalist.org, we identified the presence of Pcc in wetlands where its hosts co-occur, causing significant damage to the plants.
Article
Agronomy
Tyler C. Gordon, Yue Jin, Nicholas A. Tinker, Wubishet A. Bekele, Samuel Gale, Harold Bockelman, J. Michael Bonman
Summary: Comparative sequence analysis was used to design an SNP marker for the identification of new sources of oat stem rust resistance. It was found that Pg6 is a single dominant gene located on diploid chromosome AA2 of the A. atlantica genome. Twenty-four markers were developed from SNPs associated with Pg6 resistance, and one SNP marker, AA2_483439497, was perfectly associated with the Pg6 phenotype.
THEORETICAL AND APPLIED GENETICS
(2022)