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wheat Stripe rust

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https://www.readbyqxmd.com/read/28039515/genome-wide-association-mapping-for-seedling-and-field-resistance-to-puccinia-striiformis-f-sp-tritici-in-elite-durum-wheat
#1
Weizhen Liu, Marco Maccaferri, Peter Bulli, Sheri Rynearson, Roberto Tuberosa, Xianming Chen, Michael Pumphrey
Genome-wide association analysis in tetraploid wheat revealed novel and diverse loci for seedling and field resistance to stripe rust in elite spring durum wheat accessions from worldwide. Improving resistance to stripe rust, caused by Puccinia striiformis f. sp. tritici, is a major objective for wheat breeding. To identify effective stripe rust resistance loci, a genome-wide association study (GWAS) was conducted using 232 elite durum wheat (Triticum turgidum ssp. durum) lines from worldwide breeding programs...
December 30, 2016: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/28034841/transcription-factor-gene-tugt%C3%AE-3-is-involved-in-the-stripe-rust-resistance-in-triticum-urartu
#2
Ding Liujun, Pu Mingyu, Wei Bo, Wang Xianping, Fan Renchun, Zhang Xiangqi
Wheat stripe rust, caused by Puccinia striiformis West. f. sp. tritici Eriks. &Henn. (Pst), is a serious fungal disease. Identification of new genes associate with stripe rust resistance is important for developing disease resistant wheat cultivars and studying the mechanism of disease resistance. Trihelix is a plant specific transcription factor family, which is involved in regulation of growth and development, morphogenesis, and response to stresses. So far, no study reports on the relationship between the Trihelix family and wheat stripe rust...
December 20, 2016: Yi Chuan, Hereditas
https://www.readbyqxmd.com/read/28005310/the-lr34-adult-plant-rust-resistance-gene-provides-seedling-resistance-in-durum-wheat-without-senescence
#3
Amy Rinaldo, Brian Gilbert, Rainer Boni, Simon G Krattinger, Davinder Singh, Robert F Park, Evans Lagudah, Michael Ayliffe
The hexaploid wheat (Triticum aestivum) adult plant resistance gene, Lr34/Yr18/Sr57/Pm38/Ltn1, provides broad spectrum resistance to wheat leaf rust (Lr34), stripe rust (Yr18), stem rust (Sr57) and powdery mildew (Pm38) pathogens, and has remained effective in wheat crops for many decades. The partial resistance provided by this gene is only apparent in adult plants and not effective in field grown seedlings. Lr34 also causes leaf tip necrosis (Ltn1) in mature adult plant leaves when grown under field conditions...
December 22, 2016: Plant Biotechnology Journal
https://www.readbyqxmd.com/read/27995685/taadf4-an-actin-depolymerizing-factor-from-wheat-is-required-for-resistance-to-the-stripe-rust-pathogen-puccinia-striiformis-f-sp-tritici
#4
Bing Zhang, Yuan Hua, Juan Wang, Yan Huo, Masaki Shimono, Brad Day, Qing Ma
Actin filament assembly in plants is a dynamic process, requiring the activity of more than 75 actin-binding proteins. Central to the regulation of filament assembly and stability is the activity of a conserved family of actin-depolymerizing factors (ADFs), whose primarily function is to regulate actin filament severing and depolymerization. In recent years, the activity of ADF proteins has been linked to a variety of cellular processes, including those associated with response to stress. Herein, a wheat ADF gene, TaADF4, was identified and characterized...
December 20, 2016: Plant Journal: for Cell and Molecular Biology
https://www.readbyqxmd.com/read/27994192/mapping-of-stripe-rust-resistance-gene-in-an-aegilops-caudate-introgression-line-in-wheat-and-its-genetic-association-with-leaf-rust-resistance
#5
Puneet Inder Toor, Satinder Kaur, Mitaly Bansal, Bharat Yadav, Parveen Chhuneja
A pair of stripe rust and leaf rust resistance genes was introgressed from Aegilops caudata, a nonprogenitor diploid species with the CC genome, to cultivated wheat. Inheritance and genetic mapping of stripe rust resistance gene in backcrossrecombinant inbred line (BC-RIL) population derived from the cross of a wheat-Ae. caudata introgression line (IL) T291- 2(pau16060) with wheat cv. PBW343 is reported here. Segregation of BC-RILs for stripe rust resistance depicted a single major gene conditioning adult plant resistance (APR) with stripe rust reaction varying from TR-20MS in resistant RILs signifying the presence of some minor genes as well...
December 2016: Journal of Genetics
https://www.readbyqxmd.com/read/27965705/characterization-and-genetic-analysis-of-rice-mutant-crr1-exhibiting-compromised-non-host-resistance-to-puccinia-striiformis-f-sp-tritici-pst
#6
Jing Zhao, Yuheng Yang, Donghe Yang, Yulin Cheng, Min Jiao, Gangming Zhan, Hongchang Zhang, Junyi Wang, Kai Zhou, Lili Huang, Zhensheng Kang
Wheat stripe rust, caused by Puccinia striiformis f. sp. tritici (Pst), is one of the most devastating diseases of wheat in China. Rapid change to virulence following release of resistant cultivars necessitates ongoing discovery and exploitation of new resistance resources. Considerable effort has been directed at non-host resistance (NHR) which is believed to be durable. In the present study we identified rice mutant crr1 (compromised resistance to rust 1) that exhibited compromised NHR to Pst. Compared with wild type rice variety Nipponbare, crr1 mutant displayed a threefold increase in penetration rate by Pst, and enhanced hyphal growth...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27942031/evaluation-of-19-460-wheat-accessions-conserved-in-the-indian-national-genebank-to-identify-new-sources-of-resistance-to-rust-and-spot-blotch-diseases
#7
Sundeep Kumar, Sunil Archak, R K Tyagi, Jagdish Kumar, Vikas Vk, Sherry R Jacob, Kalyani Srinivasan, J Radhamani, R Parimalan, M Sivaswamy, Sandhya Tyagi, Mamata Yadav, Jyotisna Kumari, Deepali, Sandeep Sharma, Indoo Bhagat, Madhu Meeta, N S Bains, A K Chowdhury, B C Saha, P M Bhattacharya, Jyoti Kumari, M C Singh, O P Gangwar, P Prasad, S C Bharadwaj, Robin Gogoi, J B Sharma, Sandeep Kumar Gm, M S Saharan, Manas Bag, Anirban Roy, T V Prasad, R K Sharma, M Dutta, Indu Sharma, K C Bansal
A comprehensive germplasm evaluation study of wheat accessions conserved in the Indian National Genebank was conducted to identify sources of rust and spot blotch resistance. Genebank accessions comprising three species of wheat-Triticum aestivum, T. durum and T. dicoccum were screened sequentially at multiple disease hotspots, during the 2011-14 crop seasons, carrying only resistant accessions to the next step of evaluation. Wheat accessions which were found to be resistant in the field were then assayed for seedling resistance and profiled using molecular markers...
2016: PloS One
https://www.readbyqxmd.com/read/27917192/mining-centuries-old-in-situ-conserved-turkish-wheat-landraces-for-grain-yield-and-stripe-rust-resistance-genes
#8
Deepmala Sehgal, Susanne Dreisigacker, Savaş Belen, Ümran Küçüközdemir, Zafer Mert, Emel Özer, Alexey Morgounov
Wheat landraces in Turkey are an important genetic resource for wheat improvement. An exhaustive 5-year (2009-2014) effort made by the International Winter Wheat Improvement Programme (IWWIP), a cooperative program between the Ministry of Food, Agriculture and Livestock of Turkey, the International Center for Maize and Wheat Improvement (CIMMYT) and the International Center for Agricultural Research in the Dry Areas (ICARDA), led to the collection and documentation of around 2000 landrace populations from 55 provinces throughout Turkey...
2016: Frontiers in Genetics
https://www.readbyqxmd.com/read/27898264/effect-of-plant-age-and-leaf-position-on-susceptibility-to-wheat-stripe-rust
#9
Daniel Farber, Chris Mundt
In addition to pathogen propagule dispersal , disease spread requires successful infection of host tissue. In plant disease epidemiology, susceptibility of host tissue is often assumed to be constant. This assumption ignores changes in host phenology due to developmental stage. To examine this assumption, 3-, 4-, and 5- wk old wheat plants were inoculated with equal quantities of urediniospores of Puccinia striiformis f. sp. tritici, the causal agent of wheat stripe rust (WSR). Disease severity on each leaf was assessed and fit by mixed effect linear model as a function of leaf position and plant age...
November 29, 2016: Phytopathology
https://www.readbyqxmd.com/read/27881987/microscopic-and-molecular-characterization-of-the-prehaustorial-resistance-against-wheat-leaf-rust-puccinia-triticina-in-einkorn-triticum-monococcum
#10
Albrecht Serfling, Sven E Templer, Peter Winter, Frank Ordon
Puccinia triticina f. sp. tritici (Eriks.), the causal agent of leaf rust, causes substantial yield losses in wheat production. In wheat many major leaf rust resistance genes have been overcome by virulent races. In contrast, the prehaustorial resistance (phr) against wheat leaf rust detected in the diploid wheat Einkorn (Triticum monoccocum var. monococcum) accession PI272560 confers race-independent resistance against isolates virulent on accessions harboring resistance genes located on the A-genome of Triticum aestivum...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27819140/de-novo-balanced-complex-chromosome-rearrangements-involving-chromosomes-1b-and-3b-of-wheat-and-1r-of-rye
#11
Tianheng Ren, Zhi Li, Benju Yan, Feiquan Tan, Zongxiang Tang, Shulan Fu, Manyu Yang, Zhenglong Ren
Complex chromosome rearrangements (CCRs) are defined as structural abnormalities involving more than two chromosome breaks, coupled with exchanges of chromosomal segments. Information on CCRs in plants is limited. In the present study, a plant (26-4) harboring translocation chromosomes 1RS.1BL and 4RS.4DL was selected from a double monosomic (1R and 4R) addition line, which was derived from the hybrid between wheat cultivar MY11 and a Chinese local rye variety. The genome of the plant with double alien translocation chromosomes in the monosomic form showed more instability than that harboring a single translocation...
December 2016: Genome Génome / Conseil National de Recherches Canada
https://www.readbyqxmd.com/read/27795677/cytological-identification-of-an-aegilops-variabilis-chromosome-carrying-stripe-rust-resistance-in-wheat
#12
Laibin Zhao, Shunzong Ning, Jianjun Yu, Ming Hao, Lianquan Zhang, Zhongwei Yuan, Youliang Zheng, Dengcai Liu
Aegilops variabilis (UUS(v)S(v)), an important sources for wheat improvement, originated from chromosome doubling of a natural hybrid between Ae. umbellulata (UU) with Ae. longissima (S(l)S(l)). The Ae. variabilis karyotype was poorly characterized by fluorescent in situ hybridization (FISH). The FISH probe combination of pSc119.2, pTa71 and pTa-713 identified each of the 14 pairs of Ae. variabilis chromosomes. Our FISH ideogram was further used to detect an Ae. variabilis chromosome carrying stripe rust resistance in the background of wheat lines developed from crosses of the stripe rust susceptible bread wheat cultivar Yiyuan 2 with a resistant Ae...
September 2016: Breeding Science
https://www.readbyqxmd.com/read/27775498/virulence-and-molecular-characterization-of-experimental-isolates-of-the-stripe-rust-pathogen-puccinia-striiformis-indicate-somatic-recombination
#13
Yu Lei, Meinan Wang, Anmin Wan, Chongjing Xia, Deven R See, Min Zhang, Xianming Chen
Puccinia striiformis causes stripe rust on wheat, barley, and grasses. Natural population studies have indicated that somatic recombination plays a possible role in P. striiformis variation. To determine whether somatic recombination can occur, susceptible wheat or barley plants were inoculated with mixed urediniospores of paired isolates of P. striiformis. Progeny isolates were selected by passing through a series of inoculations of wheat or barley genotypes. Potential recombinant isolates were compared with the parental isolates on the set of 18 wheat or 12 barley genotypes that are used to differentiate races of P...
December 30, 2016: Phytopathology
https://www.readbyqxmd.com/read/27746189/characterization-and-comparative-analysis-of-the-genome-of-puccinia-sorghi-schwein-the-causal-agent-of-maize-common-rust
#14
Lucia Rochi, María José Diéguez, Germán Burguener, Martín Alejandro Darino, María Fernanda Pergolesi, Lorena Romina Ingala, Alba Romina Cuyeu, Adrián Turjanski, Enrique Domingo Kreff, Francisco Sacco
Rust fungi are one of the most devastating pathogens of crop plants. The biotrophic fungus Puccinia sorghi Schwein (Ps) is responsible for maize common rust, an endemic disease of maize (Zea mays L) in Argentina that causes significant yield losses in corn production. In spite of this, the Ps genomic sequence was not available. We used Illumina sequencing to rapidly produce the 99.6 Mb draft genome sequence of Ps race RO10H11247, derived from a single-uredinial isolate from infected maize leaves collected in the Argentine Corn Belt Region during 2010...
October 13, 2016: Fungal Genetics and Biology: FG & B
https://www.readbyqxmd.com/read/27717458/genome-wide-association-mapping-of-stripe-rust-resistance-in-afghan-wheat-landraces
#15
Alagu Manickavelu, Reem Joukhadar, Abdulqader Jighly, Caixia Lan, Julio Huerta-Espino, Ahmad Shah Stanikzai, Andrzej Kilian, Ravi P Singh, Tomohiro Ban
Mining of new genetic resources is of paramount importance to combat the alarming spread of stripe rust disease and breakdown of major resistance genes in wheat. We conducted a genome wide association study on 352 un-utilized Afghan wheat landraces against stripe rust resistance in eight locations. High level of disease variation was observed among locations and a core-set of germplasm showed consistence performance. Linkage disequilibrium (LD) decayed rapidly (R(2)≈0.16 at 0cM) due to germplasm peerless diversity...
November 2016: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/27685031/the-lr34-adult-plant-rust-resistance-gene-provides-seedling-resistance-in-durum-wheat-without-senescence
#16
Amy Rinaldo, Brian Gilbert, Rainer Boni, Simon G Krattinger, Davinder Singh, Robert F Park, Evans Lagudah, Michael Ayliffe
The hexaploid wheat (Triticum aestivum) adult plant resistance gene, Lr34/Yr18/Sr57/Pm38/Ltn1, provides broad spectrum resistance to wheat leaf rust (Lr34), stripe rust (Yr18), stem rust (Sr57) and powdery mildew (Pm38) pathogens, and has remained effective in wheat crops for many decades. The partial resistance provided by this gene is only apparent in adult plants and not effective in seedlings under standard growth conditions. Lr34 also causes leaf tip necrosis (Ltn1) in mature adult plant leaves when grown under field conditions...
September 29, 2016: Plant Biotechnology Journal
https://www.readbyqxmd.com/read/27678307/quantitative-proteomics-reveals-the-defense-response-of-wheat-against-puccinia-striiformis-f-sp-tritici
#17
Yuheng Yang, Yang Yu, Chaowei Bi, Zhensheng Kang
Wheat stripe rust, caused by Puccinia striiformis f. sp. tritici (Pst), is considered one of the most aggressive diseases to wheat production. In this study, we used an iTRAQ-based approach for the quantitative proteomic comparison of the incompatible Pst race CYR23 in infected and non-infected leaves of the wheat cultivar Suwon11. A total of 3,475 unique proteins were identified from three key stages of interaction (12, 24, and 48 h post-inoculation) and control groups. Quantitative analysis showed that 530 proteins were differentially accumulated by Pst infection (fold changes >1...
September 28, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27668423/molecular-cytogenetic-characterization-of-new-wheat-rye-1r-1b-substitution-and-translocation-lines-from-a-chinese-secale-cereal-l-aigan-with-resistance-to-stripe-rust
#18
Zhi Li, Zhenglong Ren, Feiquan Tan, Zongxiang Tang, Shulan Fu, Benju Yan, Tianheng Ren
Secale cereale L. has been used worldwide as a source of genes for agronomic and resistance improvement. In this study, a stable wheat-rye substitution line and 3 primary 1RS.1BL translocation lines were selected from the progeny of the crossing of the Chinese local rye Aigan variety and wheat cultivar Mianyang11. The substitution and translocation lines were identified by molecular cytogenetic analysis. PCR results, fluorescence in situ hybridization and acid polyacrylamide gel electrophoresis indicated that there were a pair of 1R chromosomes in the substitution line which have been named RS1200-3, and a pair of 1RS...
2016: PloS One
https://www.readbyqxmd.com/read/27610380/microtubule-polymerization-functions-in-hypersensitive-response-and-accumulation-of-h2o2-in-wheat-induced-by-the-stripe-rust
#19
Juan Wang, Yang Wang, Xinjie Liu, Yuanliu Xu, Qing Ma
The plant cytoskeleton, including microtubules and microfilaments, is one of the important factors in determining the polarity of cell division and growth, as well as the interaction of plants with invading pathogens. In defense responses of wheat against the stripe rust (Puccinia striiformis f. sp. tritici) infection, hypersensitive response is the most crucial event to prevent the spread of pathogens. In order to reveal the effect of microtubules on the hypersensitive cell death and H2O2 accumulation in the interaction of wheat (Triticum aestivum) cv...
2016: BioMed Research International
https://www.readbyqxmd.com/read/27575735/fundamental-wheat-stripe-rust-research-in-the-21-st-century
#20
Benjamin Schwessinger
I. II. III. IV. V. VI. VII. References SUMMARY: In the 21(st) century, the wheat stripe rust fungus has evolved to be the largest biotic limitation to global wheat production. New pathogen genotypes are more aggressive and able to infect previously resistant wheat varieties, leading to rapid pathogen migration across and between continents. We now know the full life cycle, microevolutionary relationships and past migration routes on a global scale. Current sequencing technologies have provided the first fungal draft genomes and simplified plant resistance gene cloning...
August 30, 2016: New Phytologist
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