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https://www.readbyqxmd.com/read/28633642/prediction-and-analysis-of-three-gene-families-related-to-leaf-rust-puccinia-triticina-resistance-in-wheat-triticum-aestivum-l
#1
Fred Y Peng, Rong-Cai Yang
BACKGROUND: The resistance to leaf rust (Lr) caused by Puccinia triticina in wheat (Triticum aestivum L.) has been well studied over the past decades with over 70 Lr genes being mapped on different chromosomes and numerous QTLs (quantitative trait loci) being detected or mapped using DNA markers. Such resistance is often divided into race-specific and race-nonspecific resistance. The race-nonspecific resistance can be further divided into resistance to most or all races of the same pathogen and resistance to multiple pathogens...
June 20, 2017: BMC Plant Biology
https://www.readbyqxmd.com/read/28591221/loci-associated-with-resistance-to-stripe-rust-puccinia-striiformis-f-sp-tritici-in-a-core-collection-of-spring-wheat-triticum-aestivum
#2
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
https://www.readbyqxmd.com/read/28589757/quantitative-trait-loci-for-slow-rusting-resistance-to-leaf-rust-in-doubled-haploid-wheat-population-ci13227-x-lakin
#3
Yue Lu, Robert Bowden, Guorong Zhang, Xiangyang Xu, Allan Fritz, Guihua Bai
CI13227 is a US winter wheat line with adult-plant slow-rusting resistance that has been the subject of several studies on the characteristics and components of slow-rusting. Previous genetic studies used different populations and approaches and came to different conclusions about the genetic basis of resistance in CI13227. To clarify the situation, a new doubled haploid (DH) population of CI13227 x Lakin was produced and a linkage map was constructed using 5570 single nucleotide polymorphism (SNP) markers derived from wheat 90K SNP assays and 84 simple sequence repeat (SSR) markers...
June 7, 2017: Phytopathology
https://www.readbyqxmd.com/read/28588389/microsatellite-markers-for-the-triticum-timopheevi-derived-leaf-rust-resistance-gene-lr18-on-wheat-5bl-chromosome
#4
Ali Aliakbari Sadeghabad, Ali Dadkhodaie, Bahram Heidari, Hooman Razi, Reza Mostowfizadeh-Ghalamfarsa
Leaf rust, caused by Puccinia triticina, is a common wheat disease worldwide. Developing resistant cultivars through deploying new or pyramiding resistance genes in a suitable line, is the most effective approach to control this disease. However, to stack genes in a genotype, efficient and reliable markers are required. In the present study, F2 plants and their corresponding F3 families from a cross between the resistant line; Thatcher (Tc) Lr18, and the susceptible cultivar 'Boolani' were used to map rust resistance gene, Lr18 using SSR markers on chromosome 5BL of hexaploid wheat...
March 2017: Breeding Science
https://www.readbyqxmd.com/read/28561994/pathogen-inducible-ta-lr34res-expression-in-heterologous-barley-confers-disease-resistance-without-negative-pleiotropic-effects
#5
Rainer Boni, Harsh Chauhan, Goetz Hensel, Anne Roulin, Justine Sucher, Jochen Kumlehn, Susanne Brunner, Simon G Krattinger, Beat Keller
Plant diseases are a serious threat to crop production. The informed use of naturally occurring disease resistance in plant breeding can greatly contribute to sustainably reduce yield losses caused by plant pathogens. The Ta-Lr34res gene encodes an ABC transporter protein and confers partial, durable and broad-spectrum resistance against several fungal pathogens in wheat. Transgenic barley lines expressing Ta-Lr34res showed enhanced resistance against powdery mildew and leaf rust of barley. While Ta-Lr34res is only active at adult stage in wheat, Ta-Lr34res was found to be highly expressed already at the seedling stage in transgenic barley resulting in severe negative effects on growth...
May 31, 2017: Plant Biotechnology Journal
https://www.readbyqxmd.com/read/28560590/high-resolution-mapping-reveals-linkage-between-genes-in-common-bean-cultivar-ouro-negro-conferring-resistance-to-the-rust-anthracnose-and-angular-leaf-spot-diseases
#6
Giseli Valentini, Maria Celeste Gonçalves-Vidigal, Oscar P Hurtado-Gonzales, Sandra Aparecida de Lima Castro, Perry B Cregan, Qijian Song, Marcial A Pastor-Corrales
Co-segregation analysis and high-throughput genotyping using SNP, SSR, and KASP markers demonstrated genetic linkage between Ur-14 and Co-3 (4) /Phg-3 loci conferring resistance to the rust, anthracnose and angular leaf spot diseases of common bean. Rust, anthracnose, and angular leaf spot are major diseases of common bean in the Americas and Africa. The cultivar Ouro Negro has the Ur-14 gene that confers broad spectrum resistance to rust and the gene cluster Co-3 (4) /Phg-3 containing two tightly linked genes conferring resistance to anthracnose and angular leaf spot, respectively...
May 30, 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/28559910/qtl-mapping-of-adult-plant-resistance-to-leaf-rust-in-the-wheat-cross-zhou-8425b-chinese-spring-using-high-density-snp-markers
#7
Peipei Zhang, Guihong Yin, Yue Zhou, Aiyong Qi, Fengmei Gao, Xianchun Xia, Zhonghu He, Zaifeng Li, Daqun Liu
Wheat leaf rust is an important disease worldwide. Growing resistant cultivars is an effective means to control the disease. In the present study, 244 recombinant inbred lines from Zhou 8425B/Chinese Spring cross were phenotyped for leaf rust severities during the 2011-2012, 2012-2013, 2013-2014, and 2014-2015 cropping seasons at Baoding, Hebei province, and 2012-2013 and 2013-2014 cropping seasons in Zhoukou, Henan province. The population was genotyped using the high-density Illumina iSelect 90K SNP assay and SSR markers...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28559761/a-systematic-review-of-rye-secale-cereale-l-as-a-source-of-resistance-to-pathogens-and-pests-in-wheat-triticum-aestivum-l
#8
REVIEW
Leonardo A Crespo-Herrera, Larisa Garkava-Gustavsson, Inger Åhman
Wheat is globally one of the most important crops. With the current human population growth rate, there is an increasing need to raise wheat productivity by means of plant breeding, along with development of more efficient and sustainable agricultural systems. Damage by pathogens and pests, in combination with adverse climate effects, need to be counteracted by incorporating new germplasm that makes wheat more resistant/tolerant to such stress factors. Rye has been used as a source for improved resistance to pathogens and pests in wheat during more than 50 years...
2017: Hereditas
https://www.readbyqxmd.com/read/28555152/molecular-cytogenetic-characterization-of-novel-wheat-rye-t1rs-1bl-translocation-lines-with-high-resistance-to-diseases-and-great-agronomic-traits
#9
Tianheng Ren, Zongxiang Tang, Shulan Fu, Benju Yan, Feiquan Tan, Zhenglong Ren, Zhi Li
Rye has been used worldwide as a source for the genetic improvement of wheat. In this study, two stable wheat-rye primary T1RS.1BL translocation lines were selected from the progeny of the crossing of the wheat cultivar Mianyang11-1 and a Chinese local rye variety, Weining. These two novel translocation lines were identified by molecular cytogenetic analysis. PCR results, multi-color fluorescence in situ hybridization (MC-FISH), and acid polyacrylamide gel electrophoresis (A-PAGE) indicated that both new translocation lines harbor a pair of T1RS...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28555151/molecular-cytogenetic-characterization-of-two-triticum-secale-thinopyrum-trigeneric-hybrids-exhibiting-superior-resistance-to-fusarium-head-blight-leaf-rust-and-stem-rust-race-ug99
#10
Yi Dai, Yamei Duan, Huiping Liu, Dawn Chi, Wenguang Cao, Allen Xue, Yong Gao, George Fedak, Jianmin Chen
Fusarium head blight (FHB), leaf rust, and stem rust are the most destructive fungal diseases in current world wheat production. The diploid wheatgrass, Thinopyrum elongatum (Host) Dewey (2n = 2x = 14, EE) is an excellent source of disease resistance genes. Two new Triticum-Secale-Thinopyrum trigeneric hybrids were derived from a cross between a hexaploid triticale (X Triticosecale Wittmack, 2n = 6x = 42, AABBRR) and a hexaploid Triticum trititrigia (2n = 6x = 42, AABBEE), were produced and analyzed using genomic in situ hybridization and molecular markers...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28553306/novel-sources-of-stripe-rust-resistance-identified-by-genome-wide-association-mapping-in-ethiopian-durum-wheat-triticum-turgidum-ssp-durum
#11
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
https://www.readbyqxmd.com/read/28545258/marker-assisted-molecular-profiling-deletion-mutant-analysis-and-rna-seq-reveal-a-disease-resistance-cluster-associated-with-uromyces-appendiculatus-infection-in-common-bean-phaseolus-vulgaris-l
#12
Antonette R Todd, Nicole Donofrio, Venkateswara R Sripathi, Phillip E McClean, Rian K Lee, Marcial Pastor-Corrales, Venu Kal Kalavacharla
Common bean (Phaseolus vulgaris L.) is an important legume, useful for its high protein and dietary fiber. The fungal pathogen Uromyces appendiculatus (Pers.) Unger can cause major loss in susceptible varieties of the common bean. The Ur-3 locus provides race specific resistance to virulent strains or races of the bean rust pathogen along with Crg, (Complements resistance gene), which is required for Ur-3-mediated rust resistance. In this study, we inoculated two common bean genotypes (resistant "Sierra" and susceptible crg) with rust race 53 of U...
May 23, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28542459/identification-and-evaluation-of-resistance-to-powdery-mildew-and-yellow-rust-in-a-wheat-mapping-population
#13
Lijun Yang, Xuejiang Zhang, Xu Zhang, Jirui Wang, Mingcheng Luo, Mujun Yang, Hua Wang, Libo Xiang, Fansong Zeng, Dazhao Yu, Daolin Fu, Garry M Rosewarne
Deployment of cultivars with genetic resistance is an effective approach to control the diseases of powdery mildew (PM) and yellow rust (YR). Chinese wheat cultivar XK0106 exhibits high levels of resistance to both diseases, while cultivar E07901 has partial, adult plant resistance (APR). The aim of this study was to map resistance loci derived from the two cultivars and analyze their effects against PM and YR in a range of environments. A doubled haploid population (388 lines) was used to develop a framework map consisting of 117 SSR markers, while a much higher density map using the 90K Illumina iSelect SNP array was produced with a subset of 80 randomly selected lines...
2017: PloS One
https://www.readbyqxmd.com/read/28542451/mapping-genes-for-resistance-to-stripe-rust-in-spring-wheat-landrace-pi-480035
#14
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
https://www.readbyqxmd.com/read/28539970/developing-transgenic-wheat-to-encounter-rusts-and-powdery-mildew-by-overexpressing-barley-chi26-gene-for-fungal-resistance
#15
Hala F Eissa, Sameh E Hassanien, Ahmed M Ramadan, Moustafa M El-Shamy, Osama M Saleh, Ahmed M Shokry, Mohamed Abdelsattar, Yasser B Morsy, Maher A El-Maghraby, Hussien F Alameldin, Sabah M Hassan, Gamal H Osman, Hesham T Mahfouz, Gharib A Gad El-Karim, Magdy A Madkour, Ahmed Bahieldin
BACKGROUND: The main aim of this study was to improve fungal resistance in bread wheat via transgenesis. Transgenic wheat plants harboring barley chitinase (chi26) gene, driven by maize ubi promoter, were obtained using biolistic bombardment, whereas the herbicide resistance gene, bar, driven by the CaMV 35S promoter was used as a selectable marker. RESULTS: Molecular analysis confirmed the integration, copy number, and the level of expression of the chi26 gene in four independent transgenic events...
2017: Plant Methods
https://www.readbyqxmd.com/read/28536568/comparing-the-genetic-diversity-and-antimicrobial-resistance-profiles-of-campylobacter-jejuni-recovered-from-cattle-and-humans
#16
Wonhee Cha, Rebekah E Mosci, Samantha L Wengert, Cristina Venegas Vargas, Steven R Rust, Paul C Bartlett, Daniel L Grooms, Shannon D Manning
Campylobacter jejuni, a leading cause of gastroenteritis in humans, is a foodborne pathogen that can reside in chickens, pigs, and cattle. Because resistance to fluoroquinolones and macrolides, which are commonly used to treat human infections, has emerged in C. jejuni, it is imperative to continously monitor resistance patterns and examine the genetic variation in strains from human infections and animal reservoirs. Our previous study of C. jejuni from human campylobacteriosis cases showed a significantly higher rate of tetracycline resistance compared to national trends, and identified multilocus sequence type (ST)-982 and a history of cattle contact to be associated with tetracycline resistance...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28513283/molecular-characterisation-of-australian-isolates-of-puccinia-graminis-f-sp-tritici-supports-long-term-clonality-but-also-reveals-cryptic-genetic-variation
#17
Jianping Zhang, Peng Zhang, Haydar Karaoglu, Robert F Park
Long term surveys of pathogenicity in Puccinia graminis f. sp. tritici (Pgt) in Australia have implicated mutation as a major source of virulence, at times leading to the demise of stem rust resistant wheat cultivars and substantial yield losses. Since 1925, these surveys have identified at least four occasions on which exotic isolates of Pgt appeared in Australia, with each acting as a founding isolate that gave rise sequentially to derivative pathotypes via presumed single step mutation. The current study aimed to examine the relationship between virulence and molecular patterns using SSR markers on selected isolates of Pgt collected in Australia during a 52 year period in order to propose an evolutionary pathway...
May 17, 2017: Phytopathology
https://www.readbyqxmd.com/read/28504667/rapid-cloning-of-genes-in-hexaploid-wheat-using-cultivar-specific-long-range-chromosome-assembly
#18
Anupriya Kaur Thind, Thomas Wicker, Hana Šimková, Dario Fossati, Odile Moullet, Cécile Brabant, Jan Vrána, Jaroslav Doležel, Simon G Krattinger
Cereal crops such as wheat and maize have large repeat-rich genomes that make cloning of individual genes challenging. Moreover, gene order and gene sequences often differ substantially between cultivars of the same crop species. A major bottleneck for gene cloning in cereals is the generation of high-quality sequence information from a cultivar of interest. In order to accelerate gene cloning from any cropping line, we report 'targeted chromosome-based cloning via long-range assembly' (TACCA). TACCA combines lossless genome-complexity reduction via chromosome flow sorting with Chicago long-range linkage to assemble complex genomes...
May 15, 2017: Nature Biotechnology
https://www.readbyqxmd.com/read/28491075/saturation-mapping-of-a-major-effect-qtl-for-stripe-rust-resistance-on-wheat-chromosome-2b-in-cultivar-napo-63-using-snp-genotyping-arrays
#19
Jianhui Wu, Qilin Wang, Shengjie Liu, Shuo Huang, Jingmei Mu, Qingdong Zeng, Lili Huang, Dejun Han, Zhensheng Kang
Stripe rust or yellow rust (YR), caused by Puccinia striiformis f. sp. tritici (Pst), is one of the most important diseases of wheat (Triticum aestivum L.). Widespread deployment of resistant cultivars is the best means of achieving durable disease control. The red grain, spring wheat cultivar Napo 63 produced by CIMMYT in the 1960s shows a high level of adult-plant resistance to stripe rust in the field. To elucidate the genetic basis of resistance in this cultivar we evaluated 224 F2:3 lines and 175 F2:6 recombinant inbred lines (RILs) derived from a cross between Napo 63 and the Pst-susceptible line Avocet S...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28469008/the-early-response-during-the-interaction-of-fungal-phytopathogen-and-host-plant
#20
REVIEW
Yilin Shen, Na Liu, Chuang Li, Xin Wang, Xiaomeng Xu, Wan Chen, Guozhen Xing, Wenming Zheng
Plants can be infected by a variety of pathogens, most of which can cause severe economic losses. The plants resist the invasion of pathogens via the innate or acquired immune system for surviving biotic stress. The associations between plants and pathogens are sophisticated beyond imaging and the interactions between them can occur at a very early stage after their touching each other. A number of researchers in the past decade have shown that many biochemical events appeared even as early as 5 min after their touching for plant disease resistance response...
May 2017: Open Biology
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