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https://www.readbyqxmd.com/read/29137188/physical-localization-of-a-locus-from-agropyron-cristatum-conferring-resistance-to-stripe-rust-in-common-wheat
#1
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. (2n = 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
https://www.readbyqxmd.com/read/29135360/transcriptome-profiling-of-melaleuca-quinquenervia-challenged-by-myrtle-rust-reveals-differences-in-defense-responses-among-resistant-individuals
#2
Ji-Fan Hsieh, Aaron Chuah, Hardip R Patel, Karanjeet Sandhu, William J Foley, Carsten Külheim
Plants have developed complex defense mechanisms to protect themselves against pathogens. A wide-host range fungus, Austropuccinia psidii (G. Winter) Beenken comb. nov., which has caused severe damage to ecosystems and plantations worldwide, is a major threat to Australian ecosystems dominated by Myrtaceae. In particular, the east coast wetland foundation tree species Melaleuca quinquenervia appears to be variably susceptible to this pathogen. Understanding the molecular basis of host resistance would enable better management of this rust disease...
November 14, 2017: Phytopathology
https://www.readbyqxmd.com/read/29125785/cytogenetic-analysis-and-mapping-of-leaf-rust-resistance-in-aegilops-speltoides-tausch-derived-bread-wheat-line-selection2427-carrying-putative-gametocidal-gene-s
#3
M Niranjana, Vinod, J B Sharma, Niharika Mallick, S M S Tomar, S K Jha
Leaf rust (Puccinia triticina) is a major biotic stress affecting wheat yields worldwide. Host-plant resistance is the best method for controlling leaf rust. Aegilops speltoides is a good source of resistance against wheat rusts. To date, five Lr genes, Lr28, Lr35, Lr36, Lr47, and Lr51, have been transferred from Ae. speltoides to bread wheat. In Selection2427, a bread wheat introgresed line with Ae. speltoides as the donor parent, a dominant gene for leaf rust resistance was mapped to the long arm of chromosome 3B (LrS2427)...
August 25, 2017: Genome Génome / Conseil National de Recherches Canada
https://www.readbyqxmd.com/read/29125778/isolation-and-molecular-cytogenetic-characterization-of-a-wheat-leymus-mollis-double-monosomic-addition-line-and-its-progenies-with-resistance-to-stripe-rust
#4
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)...
November 10, 2017: Genome Génome / Conseil National de Recherches Canada
https://www.readbyqxmd.com/read/29094279/high-throughput-transcriptome-analysis-of-coffee-reveals-prehaustorial-resistance-in-response-to-hemileia-vastatrix-infection
#5
Juan Carlos Florez, Luciana Souto Mofatto, Rejane do Livramento Freitas-Lopes, Sávio Siqueira Ferreira, Eunize Maciel Zambolim, Marcelo Falsarella Carazzolle, Laércio Zambolim, Eveline Teixeira Caixeta
We provide a transcriptional profile of coffee rust interaction and identified putative up regulated resistant genes Coffee rust disease, caused by the fungus Hemileia vastatrix, is one of the major diseases in coffee throughout the world. The use of resistant cultivars is considered to be the most effective control strategy for this disease. To identify candidate genes related to different mechanism defense in coffee, we present a time-course comparative gene expression profile of Caturra (susceptible) and Híbrido de Timor (HdT, resistant) in response to H...
November 1, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/29078294/identification-and-characterization-of-sr13-a-tetraploid-wheat-gene-that-confers-resistance-to-the-ug99-stem-rust-race-group
#6
Wenjun Zhang, Shisheng Chen, Zewdie Abate, Jayaveeramuthu Nirmala, Matthew N Rouse, Jorge Dubcovsky
The Puccinia graminis f. sp. tritici (Pgt) Ug99 race group is virulent to most stem rust resistance genes currently deployed in wheat and poses a threat to global wheat production. The durum wheat (Triticum turgidum ssp. durum) gene Sr13 confers resistance to Ug99 and other virulent races, and is more effective at high temperatures. Using map-based cloning, we delimited a candidate region including two linked genes encoding coiled-coil nucleotide-binding leucine-rich repeat proteins designated CNL3 and CNL13...
November 7, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29077073/the-biology-and-ecology-of-cat-fleas-and-advancements-in-their-pest-management-a-review
#7
REVIEW
Michael K Rust
The cat flea Ctenocephalides felis felis (Bouché) is the most important ectoparasite of domestic cats and dogs worldwide. It has been two decades since the last comprehensive review concerning the biology and ecology of C. f. felis and its management. Since then there have been major advances in our understanding of the diseases associated with C. f. felis and their implications for humans and their pets. Two rickettsial diseases, flea-borne spotted fever and murine typhus, have been identified in domestic animal populations and cat fleas...
October 27, 2017: Insects
https://www.readbyqxmd.com/read/29075275/agronomic-traits-and-molecular-marker-identification-of-wheat-aegilops-caudata-addition-lines
#8
Wenping Gong, Ran Han, Haosheng Li, Jianmin Song, Hongfei Yan, Genying Li, Aifeng Liu, Xinyou Cao, Jun Guo, Shengnan Zhai, Dungong Cheng, Zhendong Zhao, Cheng Liu, Jianjun Liu
Aegilops caudata is an important gene source for wheat breeding. Intensive evaluation of its utilization value is an essential first step prior to its application in breeding. In this research, the agronomical and quality traits of Triticum aestivum-Ae. caudata additions B-G (homoeologous groups not identified) were analyzed and evaluated. Disease resistance tests showed that chromosome D of Ae. caudata might possess leaf rust resistance, and chromosome E might carry stem rust and powdery mildew resistance genes...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29070517/host-induced-gene-silencing-of-the-mapkk-gene-psfuz7-confers-stable-resistance-to-wheat-stripe-rust
#9
Xiaoguo Zhu, Tuo Qi, Qian Yang, Fuxin He, Chenglong Tan, Wei Ma, Ralf Thomas Voegele, Zhensheng Kang, Jun Guo
RNA interference (RNAi) is a powerful genetic tool to accelerate research in plant biotechnology and to control biotic stresses by manipulating target gene expression. However, the potential of RNAi in wheat to efficiently and durably control the devastating stripe rust fungus Puccinia striiformis f. sp. tritici (Pst), remained largely under explored, so far. To address this issue, we generated transgenic wheat lines expressing double-stranded RNA targeting PsFUZ7 transcripts of Pst. We analyzed expression of PsFUZ7 and related genes, and resistance traits of the transgenic wheat lines...
October 25, 2017: Plant Physiology
https://www.readbyqxmd.com/read/29070515/flavan-3-ols-are-an-effective-chemical-defense-against-rust-infection
#10
Chhana Ullah, Sybille B Unsicker, Christin Fellenberg, C Peter Constabel, Axel Schmidt, Jonathan Gershenzon, Almuth Hammerbacher
Phenolic secondary metabolites are often thought to protect plants against attack by microbes but their role in defense against pathogen infection in woody plants has not been comprehensively investigated. We studied the biosynthesis, occurrence and anti-fungal activity of flavan-3-ols in black poplar (Populus nigra L.), which include both monomers, such as catechin, and oligomers known as proanthocyanidins (PAs). We identified and biochemically characterized three leucoanthocyanidin reductases (LAR) and two anthocyanidin reductases (ANR) from P...
October 25, 2017: Plant Physiology
https://www.readbyqxmd.com/read/29065168/evaluation-of-aisi-type-304-stainless-steel-as-a-suitable-surface-material-for-evaluating-the-efficacy-of-peracetic-acid-based-disinfectants-against-clostridium-difficile-spores
#11
Elaine Black, Krista Owens, Richard Staub, Junzhong Li, Kristen Mills, Justin Valenstein, John Hilgren
Disinfectants play an important role in controlling microbial contamination on hard surfaces in hospitals. The effectiveness of disinfectants in real life can be predicted by laboratory tests that measure killing of microbes on carriers. The modified Quantitative Disk Carrier Test (QCT-2) is a standard laboratory method that employs American Iron and Steel Institute (AISI) Type 430 stainless steel carriers to measure hospital disinfectant efficacy against Clostridium difficile spores. The formation of a rust-colored precipitate was observed on Type 430 carriers when testing a peracetic acid (PAA)-based disinfectant with the QCT-2 method...
2017: PloS One
https://www.readbyqxmd.com/read/28990484/adult-plant-leaf-rust-resistance-derived-from-toropi-wheat-is-conditioned-by-lr78-and-three-minor-qtl
#12
James Kolmer, Amy Bernardo, Guihua Bai, Matt Hayden, Shiaoman Chao
Leaf rust caused by Puccinia triticina is an important disease of wheat in many regions worldwide. Durable or long lasting leaf rust resistance has been difficult to achieve because populations of P. triticina are highly variable for virulence to race-specific resistance genes, and respond to selection by resistance genes in released wheat cultivars. The wheat cultivar Toropi, developed and grown in Brazil, was noted to have long lasting leaf rust resistance that was effective only in adult plants. The objectives of this study were to determine the chromosome location of the leaf rust resistance genes derived from Toropi in two populations of recombinant inbred lines in a partial Thatcher wheat background...
October 9, 2017: Phytopathology
https://www.readbyqxmd.com/read/28981890/overexpression-of-atgols3-and-csrfs-in-poplar-enhances-ros-tolerance-and-represses-defense-response-to-leaf-rust-disease
#13
Jonathan La Mantia, Faride Unda, Carl J Douglas, Shawn D Mansfield, Richard Hamelin
Plants respond to pathogens through an orchestration of signaling events that coordinate modifications to transcriptional profiles and physiological processes. Resistance to necrotrophic pathogens often requires jasmonic acid, which antagonizes the salicylic acid dependent biotrophic defense response. Recently, myo-inositol has been shown to negatively impact salicylic acid (SA) levels and signaling, while galactinol enhances jasmonic acid (JA)-dependent induced systemic resistance to necrotrophic pathogens...
August 30, 2017: Tree Physiology
https://www.readbyqxmd.com/read/28980046/discovery-of-a-seventh-rpp-soybean-rust-resistance-locus-in-soybean-accession-pi-605823
#14
Silas P Childs, Zachary R King, David R Walker, Donna K Harris, Kerry F Pedley, James W Buck, H Roger Boerma, Zenglu Li
A novel Rpp gene from PI 605823 for resistance to Phakopsora pachyrhizi was mapped on chromosome 19. Soybean rust, caused by the obligate biotrophic fungal pathogen Phakopsora pachyrhizi Syd. & P. Syd, is a disease threat to soybean production in regions of the world with mild winters. Host plant resistance conditioned by resistance to P. pachyrhizi (Rpp) genes has been found in numerous soybean accessions, and at least 10 Rpp genes or alleles have been mapped to six genetic loci. Identifying additional disease-resistance genes will facilitate development of soybean cultivars with durable resistance...
October 4, 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/28980023/unlocking-new-alleles-for-leaf-rust-resistance-in-the-vavilov-wheat-collection
#15
Adnan Riaz, Naveenkumar Athiyannan, Sambasivam K Periyannan, Olga Afanasenko, Olga P Mitrofanova, Gregory J Platz, Elizabeth A B Aitken, Rod J Snowdon, Evans S Lagudah, Lee T Hickey, Kai P Voss-Fels
Thirteen potentially new leaf rust resistance loci were identified in a Vavilov wheat diversity panel. We demonstrated the potential of allele stacking to strengthen resistance against this important pathogen. Leaf rust (LR) caused by Puccinia triticina is an important disease of wheat (Triticum aestivum L.), and the deployment of genetically resistant cultivars is the most viable strategy to minimise yield losses. In this study, we evaluated a diversity panel of 295 bread wheat accessions from the N. I. Vavilov Institute of Plant Genetic Resources (St Petersburg, Russia) for LR resistance and performed genome-wide association studies (GWAS) using 10,748 polymorphic DArT-seq markers...
October 4, 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/28965125/rapid-identification-of-an-adult-plant-stripe-rust-resistance-gene-in-hexaploid-wheat-by-high-throughput-snp-array-genotyping-of-pooled-extremes
#16
Jianhui Wu, Shengjie Liu, Qilin Wang, Qingdong Zeng, Jingmei Mu, Shuo Huang, Shizhou Yu, Dejun Han, Zhensheng Kang
High-throughput SNP array analysis of pooled extreme phenotypes in a segregating population by KASP marker genotyping permitted rapid, cost-effective location of a stripe rust resistance QTL in wheat. German wheat cultivar "Friedrichswerther" has exhibited high levels of adult plant resistance (APR) to stripe rust in field environments for many years. F2:3 lines and F6 recombinant inbred line (RILs) populations derived from a cross between Friedrichswerther and susceptible landrace Mingxian 169 were evaluated in the field in 2013, 2016 and 2017...
September 30, 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/28955315/analysis-of-bacterial-community-composition-of-corroded-steel-immersed-in-sanya-and-xiamen-seawaters-in-china-via-method-of-illumina-miseq-sequencing
#17
Xiaohong Li, Jizhou Duan, Hui Xiao, Yongqian Li, Haixia Liu, Fang Guan, Xiaofan Zhai
Metal corrosion is of worldwide concern because it is the cause of major economic losses, and because it creates significant safety issues. The mechanism of the corrosion process, as influenced by bacteria, has been studied extensively. However, the bacterial communities that create the biofilms that form on metals are complicated, and have not been well studied. This is why we sought to analyze the composition of bacterial communities living on steel structures, together with the influence of ecological factors on these communities...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28952421/genome-wide-association-mapping-of-loci-for-resistance-to-stripe-rust-in-north-american-elite-spring-wheat-germplasm
#18
Jayfred Gaham Godoy, Sheri Rynearson, Xianming Chen, Michael Pumphrey
Stripe rust, caused by Puccinia striiformis Westend. f. sp. tritici Erikss. (Pst), is a major yield-limiting foliar disease of wheat (Triticum aestivum L.) worldwide. In this study, the genetic variability of elite spring wheat germplasm from North America was investigated to characterize the genetic basis of effective all-stage and adult plant resistance (APR) to stripe rust. A genome-wide association study (GWAS) was conducted using 237 elite spring wheat lines genotyped with an Illumina Infinium 90K SNP array...
September 27, 2017: Phytopathology
https://www.readbyqxmd.com/read/28945025/-dna-marker-assisted-selection-of-medicinal-plants-%C3%A2-breeding-research-of-disease-resistant-cultivars-of-panax-notoginseng
#19
Lin-Lin Dong, Zhong-Jian Chen, Yong Wang, Fu-Gang Wei, Lian-Juan Zhang, Jiang Xu, Guang-Fei Wei, Rui Wang, Juan Yang, Wei-Lin Liu, Xi-Wen Li, Yu-Qi Yu, Shi-Lin Chen
DNA marker-assisted selection of medicinal plants is based on the DNA polymorphism, selects the DNA sequences related to the phenotypes such as high yields, superior quality, stress-resistance and so on according to the technologies of molecular hybridization, polymerase chain reaction and high-throughput sequencing, and assists the breeding of new cultivars. This study bred the first disease-resistant cultivar of notoginseng "Miaoxiang Kangqi 1" using the technology of DNA marker-assisted selection of medicinal plants and systematic breeding...
January 2017: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/28941315/host-induced-silencing-of-essential-genes-in-puccinia-triticina-through-transgenic-expression-of-rnai-sequences-reduces-severity-of-leaf-rust-infection-in-wheat
#20
Vinay Panwar, Mark Jordan, Brent McCallum, Guus Bakkeren
Leaf rust, caused by the pathogenic fungus Puccinia triticina (Pt), is one of the most serious biotic threats to sustainable wheat production worldwide. This obligate biotrophic pathogen is prevalent worldwide and is known for rapid adaptive evolution to overcome resistant wheat varieties. Novel disease control approaches are therefore required to minimize the yield losses caused by Pt. Having shown previously the potential of host-delivered RNA interference (HD-RNAi) in functional screening of Pt genes involved in pathogenesis, we here evaluated the use of this technology in transgenic wheat plants as a method to achieve protection against wheat leaf rust (WLR) infection...
September 23, 2017: Plant Biotechnology Journal
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