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https://www.readbyqxmd.com/read/29321647/molecular-marker-assisted-breeding-and-genome-composition-analysis-of-zhengmai-7698-an-elite-winter-wheat-cultivar
#1
Chun-Xin Li, Wei-Gang Xu, Rui Guo, Jian-Zhou Zhang, Xue-Li Qi, Lin Hu, Ming-Zhong Zhao
Zhengmai 7698 is an elite winter wheat variety widely cultivated in the Southern regions of the Yellow-Huai River Valley of China. Here, we report the molecular markers used for breeding Zhengmai 7698 and the genome composition of this cultivar revealed using genome-wide SNPs. A total of 26 DNA markers derived from the genes controlling gluten protein quality, grain hardness, flour color, disease resistance, or pre-harvesting sprouting resistance were used during breeding. Consequently, Zhengmai 7698 had strong gluten, high grain hardness index, white flour color, and high levels of resistance to powdery mildew, stripe rust infections, and pre-harvesting sprouting...
January 10, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29321354/marker-assisted-pyramiding-of-thinopyrum-derived-leaf-rust-resistance-genes-lr19-and-lr24-in-bread-wheat-variety-hd2733
#2
Mona Singh, N Mallick, S Chand, P Kumari, J B Sharma, M Sivasamy, P Jayaprakash, K V Prabhu, S K Jha, Vinod
This study was undertaken to pyramid two effective leaf rust resistance genes (Lr19 and Lr24) derived from Thinopyrum (syn. Agropyron), in the susceptible, but agronomically superior wheat cultivar HD2733 using marker-assisted selection. In the year 2001, HD2733 was released for irrigated timely sown conditions of the north eastern plains zone (NEPZ) of India became susceptible to leaf rust, a major disease of the region. Background selection helped in developing near-isogenic lines (NILs) of HD2733 with Lr19 and Lr24 with 97...
December 2017: Journal of Genetics
https://www.readbyqxmd.com/read/29303685/characterization-of-novel-gene-yr79-and-four-additional-qtl-for-all-stage-and-high-temperature-adult-plant-resistance-to-stripe-rust-in-spring-wheat-pi-182103
#3
Junyan Feng, Meinan Wang, Deven R See, Shiaoman Chao, You-Liang Zheng, Xianming Chen
Stripe rust, caused by Puccinia striiformis f. sp. tritici, is an important disease of wheat worldwide. Exploring new resistance genes is essential for breeding resistant wheat cultivars. PI 182103, a spring wheat landrace originally from Pakistan, has shown a high level of resistance to stripe rust in fields for many years, but genes for resistance to stripe rust in the variety have not been studied. To map the resistance gene(s) in PI 182103, 185 recombinant inbred lines (RILs) were developed from a cross with Avocet Susceptible (AvS)...
January 5, 2018: Phytopathology
https://www.readbyqxmd.com/read/29291153/functional-and-dna-protein-binding-studies-of-wrky-transcription-factors-and-their-expression-analysis-in-response-to-biotic-and-abiotic-stress-in-wheat-triticum-aestivum-l
#4
Lopamudra Satapathy, Dhananjay Kumar, Manish Kumar, Kunal Mukhopadhyay
WRKY, a plant-specific transcription factor family, plays vital roles in pathogen defense, abiotic stress, and phytohormone signalling. Little is known about the roles and function of WRKY transcription factors in response to rust diseases in wheat. In the present study, three TaWRKY genes encoding complete protein sequences were cloned. They belonged to class II and III WRKY based on the number of WRKY domains and the pattern of zinc finger structures. Twenty-two DNA-protein binding docking complexes predicted stable interactions of WRKY domain with W-box...
January 2018: 3 Biotech
https://www.readbyqxmd.com/read/29274571/tantf2-a-contributor-for-wheat-resistance-to-the-stripe-rust-pathogen
#5
Qiong Zhang, Bing Wang, Jinping Wei, Xiaojie Wang, Qingmei Han, Zhensheng Kang
Nuclear Transport Factor 2 (NTF2) functions as a critical regulator in balancing the GTP-and GDP-bound forms of Ran, a class of evolutionarily conserved small GTP-binding protein. During the incompatible interaction between wheat-Puccinia striiformis f. sp. tritici (Pst), a cDNA fragment encoding a putative wheat NTF2 gene was found to be significantly induced, suggesting a potential role in wheat resistance to Pst. In this work, the full length of TaNTF2 was obtained, with three copies located on 7A, 7B and 7D chromosomes, respectively...
December 16, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/29258426/inferring-defense-related-gene-families-in-arabidopsis-and-wheat
#6
Rong-Cai Yang, Fred Y Peng, Zhiqiu Hu
BACKGROUND: A large number of disease resistance genes or QTLs in crop plants are identified through conventional genetics and genomic tools, but their functional or molecular characterization remains costly, labor-intensive and inaccurate largely due to the lack of deep sequencing of large and complex genomes of many important crops such as allohexaploid wheat (Triticum aestivum L.). On the other hand, gene annotation and relevant genomic resources for disease resistance and other defense-related traits are more abundant in model plant Arabidopsis (Arabidopsis thaliana)...
December 19, 2017: BMC Genomics
https://www.readbyqxmd.com/read/29251427/a-novel-wheat-nac-transcription-factor-tanac30-negatively-regulates-resistance-of-wheat-to-stripe-rust
#7
Bing Wang, Jinping Wei, Na Song, Ning Wang, 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...
December 18, 2017: Journal of Integrative Plant Biology
https://www.readbyqxmd.com/read/29231777/de-novo-transcriptome-study-identifies-candidate-genes-involved-in-resistance-to-austropuccinia-psidii-myrtle-rust-in-syzygium-luehmannnii-riberry
#8
Peri Ann Tobias, David Guest, Carsten Külheim, Robert F Park
Austropuccinia psidii, causal agent of myrtle rust, was discovered in Australia in 2010 and has since become established on a wide range of species within the Myrtaceae. Syzygium luehmannii, endemic to Australia, is an increasingly valuable berry crop. Plants were screened for responses to A. psidii inoculation and specific resistance, in the form of localised necrosis, was determined in 29% of individuals. To understand the molecular basis underlying this response, mRNA was sequenced from leaf samples taken pre-inoculation, and at 24 and 48 hours post inoculation, from four resistant and four susceptible plants...
December 12, 2017: Phytopathology
https://www.readbyqxmd.com/read/29222636/identification-introgression-and-molecular-marker-genetic-analysis-and-selection-of-a-highly-effective-novel-oat-crown-rust-resistance-from-diploid-oat-avena-strigosa
#9
Howard W Rines, Marisa E Miller, Martin Carson, Shiaoman Chao, Tyler Tiede, Jochum Wiersma, Shahryar F Kianian
Oat crown rust is one of the most damaging diseases of oat. We identified a new source of resistance and developed KASP and TaqMan markers for selection in breeding programs. A new highly effective resistance to oat crown rust (Puccinia coronata f. sp. avenae) was identified in the diploid oat Avena strigosa PI 258731 and introgressed into hexaploid cultivated oat. Young plants with this resistance show moderate susceptibility, whereas older plant tissues and adult plants are resistant with no virulent isolates encountered in over 8 years of testing...
December 6, 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/29216443/genetic-classification-of-i-aegilops-columnaris-i-zhuk-2n-4x-28-u-sup-c-sup-u-sup-c-sup-x-sup-c-sup-x-sup-c-sup-chromosomes-based-on-fish-analysis-and-substitution-patterns-in-common-wheat-x-i-ae-columnaris-i-introgressive-lines
#10
Ekaterina D Badaeva, Alevtina S Ruban, Alexandra A Shishkina, Sergei N Sibikeev, Alexander E Druzhin, Sergei A Surzhikov, Alexandra Yu Dragovich
<i>Aegilops columnaris</i> is tetraploid <i>Aegilops</i> species originated from <i>Ae. umbellulata </i>(2n=2x=14, UU) and yet unknown diploid grass species. Although <i>Ae. columnaris </i>possesses some agronomically valuable traits, such as heat and drought tolerance, resistance to pests, it has never been used in wheat breeding due to difficulties of hybrid production and lack of information on the relationships between <i>Ae. columnaris </i>and common wheat chromosomes...
December 7, 2017: Genome Génome / Conseil National de Recherches Canada
https://www.readbyqxmd.com/read/29202692/a-comparative-analysis-of-nonhost-resistance-across-the-two-triticeae-crop-species-wheat-and-barley
#11
Rhoda Delventhal, Jeyaraman Rajaraman, Francesca L Stefanato, Sajid Rehman, Reza Aghnoum, Graham R D McGrann, Marie Bolger, Björn Usadel, Pete E Hedley, Lesley Boyd, Rients E Niks, Patrick Schweizer, Ulrich Schaffrath
BACKGROUND: Nonhost resistance (NHR) protects plants against a vast number of non-adapted pathogens which implicates a potential exploitation as source for novel disease resistance strategies. Aiming at a fundamental understanding of NHR a global analysis of transcriptome reprogramming in the economically important Triticeae cereals wheat and barley, comparing host and nonhost interactions in three major fungal pathosystems responsible for powdery mildew (Blumeria graminis ff. ssp.), cereal blast (Magnaporthe sp...
December 4, 2017: BMC Plant Biology
https://www.readbyqxmd.com/read/29177535/genome-wide-association-study-of-stem-rust-resistance-in-a-world-collection-of-cultivated-barley
#12
Austin J Case, Sridhar Bhavani, Godwin Macharia, Brian J Steffenson
QTL conferring a 14-40% reduction in adult plant stem rust severity to multiple races of Pgt were found on chromosome 5H and will be useful in barley breeding. Stem rust, caused by Puccinia graminis f. sp. tritici (Pgt) is an important disease of barley. The resistance gene Rpg1 has protected the crop against stem rust losses for over 70 years in North America, but is not effective against the African Pgt race TTKSK (and its variants) nor the domestic race QCCJB. To identify resistance to these Rpg1-virulent races, the Barley iCore Collection, held by the United States Department of Agriculture-Agricultural Research Service National Small Grains Collection was evaluated for adult plant resistance (APR) and seedling resistance to race TTKSK and APR to race QCCJB and the Pgt TTKSK composite of races TTKSK, TTKST, TTKTK, and TTKTT...
November 24, 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/29164273/mapping-and-characterization-of-wheat-stem-rust%C3%A2-resistance-genes-srtm5-and-sr60-from-triticum-monococcum
#13
Shisheng Chen, Yan Guo, Jordan Briggs, Felix Dubach, Shiaoman Chao, Wenjun Zhang, Matthew N Rouse, Jorge Dubcovsky
The new stem rust resistance gene Sr60 was fine-mapped to the distal region of chromosome arm 5A(m)S, and the TTKSK-effective gene SrTm5 could be a new allele of Sr22. The emergence and spread of new virulent races of the wheat stem rust pathogen (Puccinia graminis f. sp. tritici; Pgt), including the Ug99 race group, is a serious threat to global wheat production. In this study, we mapped and characterized two stem rust resistance genes from diploid wheat Triticum monococcum accession PI 306540. We mapped SrTm5, a previously postulated gene effective to Ug99, on chromosome arm 7A(m)L, completely linked to Sr22...
November 21, 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/29137188/physical-localization-of-a-locus-from-agropyron-cristatum-conferring-resistance-to-stripe-rust-in-common-wheat
#14
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
#15
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
#16
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
#17
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
#18
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
#19
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
#20
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
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