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Stripe rust Triticum

Hong Zhang, Ying Fu, Huan Guo, Lu Zhang, Changyou Wang, Weining Song, Zhaogui Yan, Yajuan Wang, Wanquan Ji
Stripe rust, caused by the pathogen Puccinia striiformis f. sp. tritici ( Pst ), is an important fungal foliar disease of wheat ( Triticum aestivum ). To study the mechanism underlying the defense of wheat to Pst , we used the next-generation sequencing and isobaric tags for relative and absolute quantification (iTRAQ) technologies to generate transcriptomic and proteomic profiles of seedling leaves at different stages under conditions of pathogen stress. By conducting comparative proteomic analysis using iTRAQ, we identified 2050, 2190, and 2258 differentially accumulated protein species at 24, 48, and 72 h post-inoculation (hpi)...
March 4, 2019: International Journal of Molecular Sciences
Valentina Klymiuk, Andrii Fatiukha, Tzion Fahima
Stripe (yellow) rust, caused by the fungus Puccinia striiformis f. sp. tritici (Pst), is a destructive disease of wheat spread globally. Wild emmer wheat (Triticum turgidum ssp. dicoccoides; WEW) is known as a source for novel Pst resistance genes (R-gene), but our knowledge on wheat-Pst co-evolution in natural populations is limited. Yr15 is a WEW (accession G25) gene, which confers a broad-spectrum resistance to Pst, and encodes a tandem kinase-pseudokinase protein designated as WTK1. Exon-intron comparisons of multiple WTK1 homoeologous and paralogous copies scattered in allopolyploid wheat genomes enabled us to develop functional molecular markers (FMMs), which were used for population genetic study...
February 2, 2019: Plant Journal: for Cell and Molecular Biology
Jia Zhao, Xu Zhang, Wentao Wan, Heng Zhang, Jia Liu, Mengli Li, Haiyan Wang, Jin Xiao, Xiue Wang
The EXO70 gene family is involved in different biological processes in plants, ranging from plant polar growth to plant immunity. To date, analysis of the EXO70 gene family has been limited in Triticeae species, e.g., hexaploidy Triticum aestivum and its ancestral/related species. By in silico analysis of multiple Triticeae sequence databases, a total of 200 EXO70 members were identified. By homologue cloning approaches, 15 full-length cDNA of EXO70s were cloned from diploid Haynaldia villosa . Phylogenetic relationship analysis of 215 EXO70 members classified them into three groups ( EXO70...
December 24, 2018: International Journal of Molecular Sciences
Zhixia Niu, Shiaoman Chao, Xiwen Cai, Rebecca B Whetten, Matthew Breiland, Christina Cowger, Xianming Chen, Bernd Friebe, Bikram S Gill, Jack B Rasmussen, Daryl L Klindworth, Steven S Xu
Aegilops markgrafii (Greuter) Hammer is an important source of genes for resistance to abiotic stresses and diseases in wheat ( Triticum aestivum L.). A series of six wheat 'Alcedo'- Ae. markgrafii chromosome disomic addition lines, designated as AI(B), AII(C), AIII(D), AV(E), AIV(F), and AVIII(G) carrying the Ae . markgrafii chromosomes B, C, D, E, F, and G, respectively, were tested with SSR markers to establish homoeologous relationships to wheat and identify markers useful in chromosome engineering. The addition lines were evaluated for resistance to rust and powdery mildew diseases...
2018: Frontiers in Plant Science
Rashmi Aggarwal, Deepika Kulshreshtha, Sapna Sharma, Vaibhav K Singh, Channappa Manjunatha, Subhash C Bhardwaj, Mahender S Saharan
Stripe rust caused by Puccinia striiformis f. sp. tritici (Pst) is one of the most devastating diseases of wheat (Triticum spp.) worldwide. Indian isolates were characterised based on their phenotypic reaction on differential hosts carrying different Yr genes. Based on virulence/avirulence structure, isolates were characterised into ten different pathotypes viz. 70S0-2, 67S64, 70S4, 66S0, 70S64, 66S64-1, 38S102, 47S102, 46S119, and 78S84. These Indian pathotypes of P. striiformis f. sp. tritici and 38 pathotypes of other rust species (P...
September 21, 2018: Genetics and Molecular Biology
Xue Lin, Amidou N'Diaye, Sean Walkowiak, Kirby T Nilsen, Aron T Cory, Jemanesh Haile, Hadley R Kutcher, Karim Ammar, Alexander Loladze, Julio Huerta-Espino, John M Clarke, Yuefeng Ruan, Ron Knox, Pierre Fobert, Andrew G Sharpe, Curtis J Pozniak
Stripe rust, caused by the fungal pathogen Puccinia striiformis Westend. f. sp. tritici Eriks, is an important disease of bread wheat (Triticum aestivum L.) worldwide and there is an indication that it may also become a serious disease of durum wheat (T. turgidum L. var. durum). Therefore, we investigated the genetic architecture underlying resistance to stripe rust in adapted durum wheat germplasm. Wheat infection assays were conducted under controlled conditions in Canada and under field conditions in Mexico...
2018: PloS One
Clemence Marchal, Jianping Zhang, Peng Zhang, Paul Fenwick, Burkhard Steuernagel, Nikolai M Adamski, Lesley Boyd, Robert McIntosh, Brande B H Wulff, Simon Berry, Evans Lagudah, Cristobal Uauy
Crop diseases reduce wheat yields by ~25% globally and thus pose a major threat to global food security1 . Genetic resistance can reduce crop losses in the field and can be selected through the use of molecular markers. However, genetic resistance often breaks down following changes in pathogen virulence, as experienced with the wheat yellow (stripe) rust fungus Puccinia striiformis f. sp. tritici (Pst)2 . This highlights the need to (1) identify genes that, alone or in combination, provide broad-spectrum resistance, and (2) increase our understanding of the underlying molecular modes of action...
September 2018: Nature Plants
Xiaoguo Zhu, Jia Guo, Fuxin He, Yang Zhang, Chenglong Tan, Qian Yang, Chuanming Huang, Zhensheng Kang, Jun Guo
Many obligately parasitic pathogens absorb nutrients from host plants via specialized infection structures, called haustoria and infection hyphae, to further colonization and growth in the host plant. In the wheat (Triticum aestivum) stripe rust fungus, Puccinia striiformis f. sp. tritici (Pst), the mitogen-activated protein kinase kinase (MAPKK) PsFUZ7 is involved in the regulation of haustorium formation and invasive growth. Here, we functionally characterized PsKPP4 of Pst, which is homologous to the yeast MAPKKK STE11...
December 2018: Molecular Plant Pathology
Md Abdullah-Al Mamun, Chunlei Tang, Yingchao Sun, Md Nazrul Islam, Peng Liu, Xiaojie Wang, Zhensheng Kang
Autophagy-related 8 (ATG8) protein has been reported to be involved in plant's innate immune response, but it is not clear whether such genes play a similar role in cereal crops against obligate biotrophic fungal pathogens. Here, we reported an ATG8 gene from wheat ( Triticum aestivum ), designated TaATG8j . This gene has three copies located in chromosomes 2AS, 2BS, and 2DS. The transcriptions of all three copies were upregulated in plants of the wheat cultivar Suwon 11, inoculated with an avirulent race (CYR23) of Puccinia striiformis f...
June 5, 2018: International Journal of Molecular Sciences
Philomin Juliana, Ravi P Singh, Pawan K Singh, Jesse A Poland, Gary C Bergstrom, Julio Huerta-Espino, Sridhar Bhavani, Jose Crossa, Mark E Sorrells
Genome-wide association mapping in conjunction with population sequencing map and Ensembl plants was used to identify markers/candidate genes linked to leaf rust, stripe rust and tan spot resistance in wheat. Leaf rust (LR), stripe rust (YR) and tan spot (TS) are some of the important foliar diseases in wheat (Triticum aestivum L.). To identify candidate resistance genes for these diseases in CIMMYT's (International Maize and Wheat Improvement Center) International bread wheat screening nurseries, we used genome-wide association studies (GWAS) in conjunction with information from the population sequencing map and Ensembl plants...
July 2018: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
Weizhen Liu, Yukiko Naruoka, Kaitlin Miller, Kimberly A Garland-Campbell, Arron H Carter
Stripe rust resistance is a critical need for wheat cultivars in the US Pacific Northwest (PNW). Our previous genome-wide association study (GWAS) for stripe rust resistance in a set of PNW winter wheat accessions (Panel-2) identified multiple marker-trait associations (MTAs) for both all-stage and field resistance. In this study, we conducted additional GWAS using a different set of PNW winter wheat accessions (Panel-1) that contained recently bred soft white winter wheat breeding lines and cultivars. A total of 12 all-stage resistance MTAs and eight field resistance MTAs were identified...
March 2018: Plant Genome
Bing Wang, Jinping Wei, Na Song, Ning Wang, Jing Zhao, Zhensheng Kang
NAC transcription factors are widespread in the plant kingdom and play essential roles in the transcriptional regulation of defense responses. In this study, we isolated a novel NAC transcription factor gene, TaNAC30, from a cDNA library constructed from wheat (Triticum aestivum) plants inoculated with the stripe rust pathogen Puccinia striiformis f. sp. tritici (Pst). TaNAC30 contains a typical NAM domain and localizes to the nucleus. Yeast one-hybrid assays revealed that TaNAC30 exhibits transcriptional activity and that its C-terminus is necessary for the activation of transcription...
May 2018: Journal of Integrative Plant Biology
Zhi Zhang, Liqiang Song, Haiming Han, Shenghui Zhou, Jinpeng Zhang, Xinming Yang, Xiuquan Li, Weihua Liu, Lihui Li
Stripe rust, caused by Puccinia striiformis f. sp. tritici ( Pst ), is one of the most destructive diseases of wheat ( Triticum aestivum L.) worldwide. Agropyron cristatum (L.) Gaertn. (2 n = 28, PPPP), one of the wild relatives of wheat, exhibits resistance to stripe rust. In this study, wheat- A . cristatum 6P disomic addition line 4844-12 also exhibited resistance to stripe rust. To identify the stripe rust resistance locus from A . cristatum 6P, ten translocation lines, five deletion lines and the BC₂F₂ and BC₃F₂ populations of two wheat- A ...
November 13, 2017: International Journal of Molecular Sciences
Xiaofei Yang, Xin Li, Changyou Wang, Chunhuan Chen, Zengrong Tian, Wanquan Ji
A common wheat - Leymus mollis (2n = 4x = 28, NsNsXmXm) double monosomic addition line, M11003-4-3-8/13/15 (2n = 44 = 42T.a + L.m2 + L.m3), with stripe rust resistance was developed (where T.a represents Triticum aestivum chromosome, L.m represents L. mollis chromosome, and L.m2/3 represents L. mollis chromosome of homoeologous groups 2 and 3). The progenies of line M11003-4-3-8/13/15 were characterized by cytological observation, specific molecular markers, fluorescence in situ hybridization (FISH), and genomic in situ hybridization (GISH)...
December 2017: Genome Génome / Conseil National de Recherches Canada
Firdissa E Bokore, Richard D Cuthbert, Ron E Knox, Harpinder S Randhawa, Colin W Hiebert, Ron M DePauw, Asheesh K Singh, Arti Singh, Andrew G Sharpe, Amidou N'Diaye, Curtis J Pozniak, Curt McCartney, Yuefeng Ruan, Samia Berraies, Brad Meyer, Catherine Munro, Andy Hay, Karim Ammar, Julio Huerta-Espino, Sridhar Bhavani
Quantitative trait loci controlling stripe rust resistance were identified in adapted Canadian spring wheat cultivars providing opportunity for breeders to stack loci using marker-assisted breeding. Stripe rust or yellow rust, caused by Puccinia striiformis Westend. f. sp. tritici Erikss., is a devastating disease of common wheat (Triticum aestivum L.) in many regions of the world. The objectives of this research were to identify and map quantitative trait loci (QTL) associated with stripe rust resistance in adapted Canadian spring wheat cultivars that are effective globally, and investigate opportunities for stacking resistance...
December 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
Weizhen Liu, Marco Maccaferri, Xianming Chen, Gaetano Laghetti, Domenico Pignone, Michael Pumphrey, Roberto Tuberosa
SNP-based genome scanning in worldwide domesticated emmer germplasm showed high genetic diversity, rapid linkage disequilibrium decay and 51 loci for stripe rust resistance, a large proportion of which were novel. Cultivated emmer wheat (Triticum turgidum ssp. dicoccum), one of the oldest domesticated crops in the world, is a potentially rich reservoir of variation for improvement of resistance/tolerance to biotic and abiotic stresses in wheat. Resistance to stripe rust (Puccinia striiformis f. sp. tritici) in emmer wheat has been under-investigated...
November 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
Junjuan Wang, Fei Tao, Wei Tian, Zhongfeng Guo, Xianming Chen, Xiangming Xu, Hongsheng Shang, Xiaoping Hu
WRKY transcription factors (TFs) play crucial roles in plant resistance responses to pathogens. Wheat stripe rust, caused by the fungal pathogen Puccinia striiformis f. sp. tritici (Pst), is a destructive disease of wheat (Triticum aestivum) worldwide. In this study, the two WRKY genes TaWRKY49 and TaWRKY62 were originally identified in association with high-temperature seedling-plant resistance to Pst (HTSP) resistance in wheat cultivar Xiaoyan 6 by RNA-seq. Interestingly, the expression levels of TaWRKY49 and TaWRKY62 were down- and up-regulated, respectively, during HTSP resistance in response to Pst...
2017: PloS One
Kebede T Muleta, Peter Bulli, Sheri Rynearson, Xianming Chen, Michael Pumphrey
Stripe rust, caused by Puccinia striiformis Westend. f. sp. tritici Erikss. (Pst) remains one of the most significant diseases of wheat worldwide. We investigated stripe rust resistance by genome-wide association analysis (GWAS) in 959 spring wheat accessions from the United States Department of Agriculture-Agricultural Research Service National Small Grains Collection, representing major global production environments. The panel was characterized for field resistance in multi-environment field trials and seedling resistance under greenhouse conditions...
2017: PloS One
Weizhen Liu, Marco Maccaferri, Sheri Rynearson, Tesfaye Letta, Habtemariam Zegeye, Roberto Tuberosa, Xianming Chen, Michael Pumphrey
Stripe rust of wheat, caused by Puccinia striiformis f. sp. tritici (Pst), is a global concern for wheat production, and has been increasingly destructive in Ethiopia, as well as in the United States and in many other countries. As Ethiopia has a long history of stripe rust epidemics, its native wheat germplasm harbors potentially valuable resistance loci. Moreover, the Ethiopian germplasm has been historically underutilized in breeding of modern wheat worldwide and thus the resistance alleles from the Ethiopian germplasm represent potentially novel sources...
2017: Frontiers in Plant Science
Jinita Sthapit Kandel, Vandhana Krishnan, Derick Jiwan, Xianming Chen, Daniel Z Skinner, Deven R See
Stripe rust caused by Puccinia striiformis Westend. f. sp. tritici Erikks. is an economically important disease of wheat (Triticum aestivum L.). Hexaploid spring wheat landrace PI 480035 was highly resistant to stripe rust in the field in Washington during 2011 and 2012. The objective of this research was to identify quantitative trait loci (QTL) for stripe rust resistance in PI 480035. A spring wheat, "Avocet Susceptible" (AvS), was crossed with PI 480035 to develop a biparental population of 110 recombinant inbred lines (RIL)...
2017: PloS One
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