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wheat Stripe rust

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https://www.readbyqxmd.com/read/27898264/effect-of-plant-age-and-leaf-position-on-susceptibility-to-wheat-stripe-rust
#1
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
#2
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
#3
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...
August 23, 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
#4
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
#5
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 if 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 and/or 12 barley genotypes that are used to differentiate races of P...
October 24, 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
#6
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
#7
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
#8
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
#9
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
#10
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
#11
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
#12
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
https://www.readbyqxmd.com/read/27519831/yr32-for-resistance-to-stripe-yellow-rust-present-in-the-wheat-cultivar-carstens-v
#13
L Eriksen, F Afshari, M J Christiansen, R A McIntosh, A Jahoor, C R Wellings
No abstract text is available yet for this article.
February 2004: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/27446108/tatypa-a-ribosome-binding-gtpase-protein-positively-regulates-wheat-resistance-to-the-stripe-rust-fungus
#14
Peng Liu, Thwin Myo, Wei Ma, Dingyun Lan, Tuo Qi, Jia Guo, Ping Song, Jun Guo, Zhensheng Kang
Tyrosine phosphorylation protein A (TypA/BipA) belongs to the ribosome-binding GTPase superfamily. In many bacterial species, TypA acts as a global stress and virulence regulator and also mediates resistance to the antimicrobial peptide bactericidal permeability-increasing protein. However, the function of TypA in plants under biotic stresses is not known. In this study, we isolated and functionally characterized a stress-responsive TypA gene (TaTypA) from wheat, with three copies located on chromosomes 6A, 6B, and 6D, respectively...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27296143/role-of-alternate-hosts-in-epidemiology-and-pathogen-variation-of-cereal-rusts
#15
Jie Zhao, Meinan Wang, Xianming Chen, Zhensheng Kang
Cereal rusts, caused by obligate and biotrophic fungi in the genus Puccinia, are important diseases that threaten world food security. With the recent discovery of alternate hosts for the stripe rust fungus (Puccinia striiformis), all cereal rust fungi are now known to be heteroecious, requiring two distinct plant species serving as primary or alternate hosts to complete their sexual life cycle. The roles of the alternate hosts in disease epidemiology and pathogen variation vary greatly from species to species and from region to region because of different climatic and cropping conditions...
August 4, 2016: Annual Review of Phytopathology
https://www.readbyqxmd.com/read/27252028/the-stripe-rust-fungal-effector-pec6-suppresses-pattern-triggered-immunity-in-a-host-species-independent-manner-and-interacts-with-adenosine-kinases
#16
Changhai Liu, Carsten Pedersen, Torsten Schultz-Larsen, Geziel B Aguilar, Kenneth Madriz-Ordeñana, Mogens S Hovmøller, Hans Thordal-Christensen
We identified a wheat stripe rust (Puccinia striiformis) effector candidate (PEC6) with pattern-triggered immunity (PTI) suppression function and its corresponding host target. PEC6 compromised PTI host species-independently. In Nicotiana benthamiana, it hampers reactive oxygen species (ROS) accumulation and callose deposition induced by Pseudomonas fluorescens. In Arabidopsis, plants expressing PEC6 were more susceptible to Pseudomonas syringae pv. tomato (Pto) DC3000 ΔAvrPto/ΔAvrPtoB. In wheat, PEC6-suppression of P...
June 2, 2016: New Phytologist
https://www.readbyqxmd.com/read/27251389/research-investment-implications-of-shifts-in-the-global-geography-of-wheat-stripe-rust
#17
Jason M Beddow, Philip G Pardey, Yuan Chai, Terrance M Hurley, Darren J Kriticos, Hans-Joachim Braun, Robert F Park, William S Cuddy, Tania Yonow
Breeding new crop varieties with resistance to the biotic stresses that undermine crop yields is tantamount to increasing the amount and quality of biological capital in agriculture. However, the success of genes that confer resistance to pests induces a co-evolutionary response that depreciates the biological capital embodied in the crop, as pests evolve the capacity to overcome the crop's new defences. Thus, simply maintaining this biological capital, and the beneficial production and economic outcomes it bestows, requires continual reinvestment in new crop defences...
2015: Nature Plants
https://www.readbyqxmd.com/read/27226168/genetic-architecture-of-resistance-to-stripe-rust-in-a-global-winter-wheat-germplasm-collection
#18
Peter Bulli, Junli Zhang, Shiaoman Chao, Xianming Chen, Michael Pumphrey
Virulence shifts in populations of Puccinia striiformis f. sp. tritici (Pst), the causal pathogen of wheat stripe rust, are a major challenge to resistance breeding. The majority of known resistance genes are already ineffective against current races of Pst, necessitating the identification and introgression of new sources of resistance. Germplasm core collections that reflect the range of genetic and phenotypic diversity of crop species are ideal platforms for examining the genetic architecture of complex traits such as resistance to stripe rust...
2016: G3: Genes—Genomes—Genetics
https://www.readbyqxmd.com/read/27208148/inheritance-and-molecular-mapping-of-an-all-stage-stripe-rust-resistance-gene-derived-from-the-chinese-common-wheat-landrace-yilongtuomai
#19
Xue-Lian Wu, Jian-Wei Wang, Yu-Kun Cheng, Xue-Ling Ye, Wei Li, Zhi-En Pu, Qian-Tao Jiang, Yu-Ming Wei, Mei Deng, You-Liang Zheng, Guo-Yue Chen
Yellow or stripe rust, caused by Puccinia striiformis f. sp. tritici (Pst), is a devastating foliar disease that affects common wheat (Triticum aestivum L.) around the world. In China, common wheat landraces are potential sources of disease and abiotic stress resistance genes for wheat improvement. Yilongtuomai (YL), a wheat landrace from Yilong County, Sichuan Province, shows high levels of resistance against most Chinese Pst races. In this study, the resistance of YL to stripe rust disease was examined in detail...
September 2016: Journal of Heredity
https://www.readbyqxmd.com/read/27182983/divergent-development-of-hexaploid-triticale-by-a-wheat-rye-psathyrostachys-huashanica-trigeneric-hybrid-method
#20
Houyang Kang, Hao Wang, Juan Huang, Yujie Wang, Daiyan Li, Chengdou Diao, Wei Zhu, Yao Tang, Yi Wang, Xing Fan, Jian Zeng, Lili Xu, Lina Sha, Haiqin Zhang, Yonghong Zhou
Hexaploid triticale is an important forage crop and a promising energy plant. Some forms were previously reported for developing the hexaploid triticale, such as crossing tetraploid wheat or hexaploid wheat with rye, crossing hexaploid triticale and/or hexaploid wheat with octoploid triticale, and spontaneously appearing in the selfed progenies of octoploid triticale. In the present study, we developed an effective method for production of diverse types of hexaploid triticale via wheat-rye-Psathyrostachys huashanica trigeneric hybrid...
2016: PloS One
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