1,114 research outputs found
Combating stem and leaf rust of wheat: Historical perspective, impacts, and lessons learned
No full textmillions fed, food security, wheat rust, stem rust, leaf rust, Norman Borlaug,
SNP data of 56 Kazakhstani and 23 reference isolates of the wheat stem rust fungus, Puccinia graminis f. sp. tritici
No full textIn the excel file, we provide the data of the 2310 loci from a custom Illumina SNP array (PgtSNP 3.0 K chip) used for genetic analysis.This dataset includes 2310 SNP loci of 79 isolates of the wheat stem rust fungus, Puccina graminis f .sp. tritici (Pgt). This data was used to assess the genetic diversity of a Pgt population (56 isolates) from Kazakhstan derived from stem rust samples collected in 2015-2017 wheat growing seasons. Twenty-three reference isolates from previously defined genetic clades were included in the analysis. Results indicate that the Pgt population form Kazakhstan is highly diverse and most of the isolates are of sexual origin. Data is being released now in conjunction with publication of a primary research paper that describes this work.Bill and Melinda Gates Foundation and the United Kingdom Department for International Development, Grant numbers: DRRW-OPPGD1389 and DGGW-OPP1133199.Olivera Firpo, Pablo; Szabo, Les J; Kokhmetova, Alma; Morgunov, Alexey; Luster, Douglas; Jin, Yue. (2022). SNP data of 56 Kazakhstani and 23 reference isolates of the wheat stem rust fungus, Puccinia graminis f. sp. tritici. Retrieved from the University Digital Conservancy, https://doi.org/10.13020/hgp6-t930
D. J. Opperman se teaterkwatryn
No full textCITATION: Rust, M. 2004. D. J. Opperman se teaterkwatryn. Stilet, 16(2).D.J. Opperman's theatre quatrain in the Artscape theatre, Cape Town, was never included in one of his volumes of poetry. As a result, the quatrain and its history have enjoyed little prominence in literary discussions. This article focuses on the genetic history of the quatrain, making use of the original documents available at the Documentation Centre of the J.S. Gericke Library, University of Stellenbosch. Background information concerning the origin of the quatrain is provided, followed by a discussion of the nine stages in the development of the quatrain.Publisher's versio
Recombination in the wheat stem rust pathogen mediated by an indigenous barberry species in Spain
No full textThe comeback of wheat stem rust in Europe, caused by Puccinia graminis f. sp. tritici, and the prevalence of the alternate (sexual) host in local areas have recently regained attention as a potential threat to European wheat production. The aim of this study was to investigate a potential epidemiological link between the aecia found on an indigenous barberry species and stem rust infections on nearby cereals and grasses. Aecial infections collected from Berberis vulgaris subsp. seroi were inoculated on a panel of susceptible genotypes of major cereal crop species. In total, 67 stem rust progeny isolates were recovered from wheat (51), barley (7), and rye (9), but none from oat, indicating the potential of barberry derived isolates to infect multiple cereals. Molecular genotyping of the progeny isolates and 20 cereal and grass stem rust samples collected at the same locations and year, revealed a clear genetic relatedness between the progeny isolated from barberry and the stem rust infections found on nearby cereal and grass hosts. Analysis of Molecular Variance indicated that variation between the stem rust populations accounted for only 1%. A Principal Components Analysis using the 62 detected multilocus genotypes also demonstrated a low degree of genetic variation among isolates belonging to the two stem rust populations. Lastly, pairwise comparisons based on fixation index (Fst), Nei’s genetic distances and number of effective migrants (Nm) revealed low genetic differentiation and high genetic exchange between the two populations. Our results demonstrated a direct epidemiological link and functionality of an indigenous barberry species as the sexual host of P. graminis in Spain, a factor that should be considered when designing future strategies to prevent stem rust in Europe and beyond.The author(s) declare financial support was received for the research, authorship, and/or publication of this article. This research was supported by the Bill and Melinda Gates Foundation and the United Kingdom Department for International Development (Grant Number OPP1133199, Delivering Genetic Gain in Wheat (DGGW), the European Commission, Research and Innovation, Horizon 2020-Sustainable Food Security (Grant number 773311-2, RustWatch), Agencia Estatal de Investigación, Spain (Project PID2020-118650RR-C31).info:eu-repo/semantics/publishedVersio
Women’s Performance in Early Modern Europe: Transnational Mobilities. Forum
No full textCo-editor and co-author of short introduction, with Melinda Gough, of a research forum for Renaissance Drama
Identification of molecular markers for an efficient leaf rust resistance gene (Lr29) in wheat
No full textThe aim of this study was to find molecular markers (RAPD and SCAR) for the wheat leaf rust resistance gene Lr29. Among 81 RAPD primers tested, only one (OPYIO) detected an additional band in the resistant NIL of Lr29. The genetic linkage of this molecular marker to Lr29 was tested on a segregating F2 population derived from a cross between the leaf rust resistant line and the susceptible parent GK Délibáb. This marker was closely linked to the Lr29 gene. The polymorphic band was cloned and sequenced. Specific primers (SCAR) were synthesized and after amplification only resistant lines showed an amplified product. A second SCAR primer for another Lr29 RAPD fragment (UBC219, Procunier et al., 1995) was also designed and tested
Enhancing Home Computer User Information Security: Factors to Consider in the Design of Anti-phishing Applications
No full textx, 116 p. : ill. This paper was completed as part of the final research component in the University of Oregon Applied Information Management Master's Degree Program [see htpp://aim.uoregon.edu].As home computer users increase dependency on the Internet to complete electronic transactions, the need to resolve phishing vulnerabilities in the user interface becomes more urgent (Dhamija & Tygar, 2005a). Selected literature published between 2004 and 2007 is analyzed to provide designers and developers of anti-phishing applications with a set of fundamental user-centered design principles to consider prior to system design and technology solutions selection. The significance of anti-phishing user education is also examined.
The author of this study is a recipient of the AIM Director's Distinguished Capstone Award
Identification and Characterization of Resistance Loci to Wheat Leaf Rust and Stripe Rust in Afghan Landrace “KU3067”
No full textLeaf rust and stripe rust are important wheat diseases worldwide causing significant losses where susceptible varieties are grown. Resistant cultivars offer long-term control and reduce the use of hazardous chemicals, which can be detrimental to both human health and the environment. Land races have been a valuable resource for mining new genes for various abiotic and biotic stresses including wheat rusts. Afghan wheat landrace “KU3067” displayed high seedling infection type (IT) for leaf rust and low IT for stripe rust; however, it displayed high levels of field resistance for both rusts when tested for multiple seasons against the Mexican rust isolates. This study focused on identifying loci-conferring seedling resistance to stripe rust, and also loci-conferring adult plant resistance (APR) against the Mexican races of leaf rust and stripe rust. A backcrossed inbred line (BIL) population advanced to the BC1F(5) generation derived from the cross of KU3067 and Apav (triple rust susceptible line) was used for both, inheritance and QTL mapping studies. The population and parents were genotyped with Diversity Arrays Technology-genotyping-by-sequencing (DArT-Seq) and phenotyped for leaf rust and stripe rust response at both seedling and adult plant stages during multiple seasons in Mexico with relevant pathotypes. Mapping results identified an all-stage resistance gene for stripe rust, temporarily designated as YrKU, on chromosome 7BL. In total, six QTL-conferring APR to leaf rust on 1AS, 2AL, 4DL, 6BL, 7AL, and 7BL, and four QTL for stripe rust resistance on 1BS, 2AL, 4DL, and 7BL were detected in the analyses. Among these, pleiotropic gene Lr67/Yr46 on 4DL with a significantly large effect is the first report in an Afghan landrace-conferring resistance to both leaf and stripe rusts. QLr.cim-7BL/YrKU showed pleiotropic resistance to both rusts and explained 7.5–17.2 and 12.6–19.3% of the phenotypic variance for leaf and stripe rusts, respectively. QYr.cim-1BS and QYr.cim-2AL detected in all stripe environments with phenotypic variance explained (PVE) 12.9–20.5 and 5.4–12.5%, and QLr.cim-6BL are likely to be new. These QTL and their closely linked markers will be useful for fine mapping and marker-assisted selection (MAS) in breeding for durable resistance to multiple rust diseases
Economic growth and distribution of income: A growth model to fit Ghanaian data
No full textIncome distribution, economic growth, Development strategies,
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Melinda Wagner and Her Piano Concerto: "Extremity of Sky"
No full textMelinda Wagner (1957-) is one of the most influential female American composers across the 20th and 21st centuries. Extremity of Sky: Concerto for Piano and Orchestra was a commissioned work by the Chicago Symphony Orchestra for Emanuel Ax with funding from the Prince Prize. Wagner was writing the second movement of the concerto when the September 11 attacks happened in New York City. Later, she named this piece “Extremity of Sky,” metaphorically alluding to the dark smoke in the sky. Wagner finally completed this work in 2002, with a traditional four-movement frame: Opening, Departure, Prayer-Chain, and Varied Return. The grandiosity and bravura of its structure, orchestration, sonority, and arrangement continually strike the hearts of listeners.This essay will include Melinda Wagner’s biography, compositional style, and it will also provide a theoretical analysis of her piano concerto. The author hopes that this research will provide an introduction to the remarkable composer Melinda Wagner and help pianists who desire to understand the general structure and compositional principle of this music. </p
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