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Targeting Quantitative Trait Loci For Adult Plant Stripe Rust Resistance In Wheat
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Book Synopsis Targeting Quantitative Trait Loci for Adult Plant Stripe Rust Resistance in Wheat by : Onoufrios Agathoclis Philippou
Download or read book Targeting Quantitative Trait Loci for Adult Plant Stripe Rust Resistance in Wheat written by Onoufrios Agathoclis Philippou and published by . This book was released on 2007 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stripe Rust written by Xianming Chen and published by Springer. This book was released on 2017-07-11 with total page 723 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book comprehensively introduces stripe rust disease, its development and its integral control. Covering the biology, genetics, genome, and functional genomics of the pathogen, it also discusses host and non-host resistance, their interactions and the epidemiology of the disease. It is intended for scientists, postgraduates and undergraduate studying stripe rust, plant pathology, crop breeding, crop protection and agricultural science, but is also a valuable reference book for consultants and administrators in agricultural businesses and education.
Book Synopsis Inheritance and Quantitative Trait Loci Analysis of Leaf Rust Resistance in Wheat by : Julia Xiuling Zhang
Download or read book Inheritance and Quantitative Trait Loci Analysis of Leaf Rust Resistance in Wheat written by Julia Xiuling Zhang and published by . This book was released on 2007 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Characterization of Stripe Rust Resistance and Yield-related Traits in an 'Overley' X 'Overland' Population by : Wardah K. Mustahsan
Download or read book Characterization of Stripe Rust Resistance and Yield-related Traits in an 'Overley' X 'Overland' Population written by Wardah K. Mustahsan and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wheat is a vital cereal crop, providing 20 % of the daily nutritional requirements for consumers worldwide. Although there has been a substantial increase in production and yield gains, food demands will still be on the rise in future decades, and wheat yields must continue to increase rapidly to meet these demands. Grain yield can be inhibited by biotic factors (pathogens), which require the development of resistant varieties against pathogens. Stripe (yellow) rust produces massive yield losses in wheat production, and ample resistance against stripe rust is achieved by pyramiding multiple resistant genes together. Yield also can be improved by characterizing the underlying mechanisms that define yield and yield-related traits. We used breeding technology tools to dissect the genetic architecture of yield-related traits, yield, and stripe rust resistance to identify genomic regions that can improve these traits in wheat germplasm and broaden the genetic resources available for breeders to develop robust breeding germplasm that can improve the profitability and resilience of wheat production. Stripe (yellow) rust, caused by Puccinia striiformis (Pst), is a devastating disease of wheat worldwide. In commercial production, stripe rust reduces forage yield, grain yield and grain quality. Yield losses caused by stripe rust range from 10% to 70%. This study was conducted using two different wheat reference genomes (IWGSC v2.1('Chinese Spring') and 'Jagger') to identify quantitative trait loci (QTL) associated with adult plant field resistance to stripe rust in the hard winter wheat RIL population, 'Overley' x 'Overland' to provide breeders with identified genomic regions associated with quantitative field resistance. Our QTL analysis identified genomic regions on 2AS (2N[superscript v]S translocation), 2BS, 2BL, and 2DL using two different mapping methods (Inclusive Composite Interval Mapping and Multi-Environmental Trial Analysis) that were associated with stripe rust resistance for both infection type and severity using genetic maps from both genomes. There were no meaningful differences in interpreting the data from the two maps. Overley contributed the resistance alleles at the 2AS and 2BL QTLs. Overland contributed the resistance alleles at the 2BS and 2DL QTLs. The 2DL QTL (QYr.hwwg-2D) will be further refined due its environmental stability for resistance. We designed PCR-based SNP marker assays to efficiently identify these genomic regions in breeding populations. Yield improvement can be facilitated by a deeper understanding of the underlying infrastructure of components that determine grain yield. We performed a QTL analysis on the population Overley x Overland, to identify genomic regions in our population can explain the variation in yield and its components in field trials using the two different reference maps. We identified major QTLs in both reference maps for yield (3BL), single kernel weight (4AL), plant height (6AS), grains per spike (4AL), thousand grain weight (4AL), and physiological maturity (2BS). The Jagger map identified more QTLs (40 QTLs) than the IWGSCv2.1 map (30 QTLs). The future direction of these studies will be marker development to utilize these QTLs in yield-improvement breeding programs.
Book Synopsis Mapping of quantitative-trait loci (QTL) for adult-plant resistance to Septoria tritici in five wheat populations (Triticum aestivum L.) by : Peter Risser
Download or read book Mapping of quantitative-trait loci (QTL) for adult-plant resistance to Septoria tritici in five wheat populations (Triticum aestivum L.) written by Peter Risser and published by . This book was released on 2010 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wheat Blast written by Sudheer Kumar and published by CRC Press. This book was released on 2020-04-09 with total page 157 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wheat Blast provides systematic and practical information on wheat blast pathology, summarises research progress and discusses future perspectives based on current understanding of the existing issues. The book explores advance technologies that may help in deciding the path for future research and development for better strategies and techniques to manage the wheat blast disease. It equips readers with basic and applied understanding on the identification of disease, its distribution and chances of further spread in new areas, its potential to cause yield losses to wheat, the conditions that favour disease development, disease prediction modelling, resistance breeding methods and management strategies against wheat blast. Features: Provides comprehensive information on wheat blast pathogen and its management under a single umbrella Covers disease identification and diagnostics which will be helpful to check introduction in new areas Discusses methods and protocol to study the different aspects of the disease such as diagnostics, variability, resistance screening, epiphytotic creation etc. Gives deep insight on the past, present and future outlook of wheat blast research progress This book’s chapters are contributed by experts and pioneers in their respective fields and it provides comprehensive insight with updated findings on wheat blast research. It serves as a valuable reference for researchers, policy makers, students, teachers, farmers, seed growers, traders, and other stakeholders dealing with wheat.
Book Synopsis The Wheat Rusts — Breeding for Resistance by : Douglas R. Knott
Download or read book The Wheat Rusts — Breeding for Resistance written by Douglas R. Knott and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 213 pages. Available in PDF, EPUB and Kindle. Book excerpt: The idea for this book was conceived by the late Dr. Irvine A. Watson of the University of Sydney, and he developed the first outline. I was then invited by Dr. Watson to share in its writing. Unfortunately, shortly there after, recurring heart problems forced him to curtail his activities and with draw from the project. He died before the book could be completed. Dr. Watson's intention was to produce a very practical book that would provide wheat breeders with all of the information necessary to breed success fully for resistance to the three wheat rusts: leaf rust, stem rust, and yellow rust. It was intended to be very specific in describing procedures to be used and at the same time provide all of the necessary theoretical background. I hope that I have been successful in meeting these objectives. The book assumes that the reader has some knowledge of plant pathology, genetics, and plant breeding. Extensive use has been made of the literature, but it was not possible to cite all of the papers on a given topic. In making a choice, an attempt was made to choose key papers or more recent papers that provided references to the earlier literature. Acknowledgements This book was written partly at the University of Saskatchewan and partly at the University of California, Davis, while I was on a sabbatical leave.
Book Synopsis QTL Mapping of Stripe Rust Resistance and End-use Quality in Winter Wheat (Triticum Aestivum L.) by : Emily Frances Klarquist
Download or read book QTL Mapping of Stripe Rust Resistance and End-use Quality in Winter Wheat (Triticum Aestivum L.) written by Emily Frances Klarquist and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Genetics of Resistance to Leaf and Stripe Rust Diseases in the Spring Wheat 'Amadina' by : Peter Michael Bulli Nyori
Download or read book Genetics of Resistance to Leaf and Stripe Rust Diseases in the Spring Wheat 'Amadina' written by Peter Michael Bulli Nyori and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In this research, a recombinant inbred line (RIL) population derived from cross between a leaf rust- and stripe rust-susceptible spring wheat 'Avocet S' and a slow leaf- and stripe-rusting resistant spring wheat 'Amadina' was used to postulate and map leaf rust seedling resistance genes, identify quantitative trait loci (QTL) for slow-rusting resistance against leaf and stripe rust, and study slow leaf-rusting components, latent period and infection frequency. Two known Lr genes (Lr23, and Lr26) were identified to be present in 'Amadina' through gene postulation, pedigree, cytogenetic, and polymerase chain reaction analyses. One unknown gene associated with seedling resistance was also mapped on chromosome 1BL. In greenhouse experiment, it was estimated that at least five genes conditioning final disease severity (FS) and latent period (LP), and four genes conditioning infection frequency (IF), segregated in the population. Correlations between LP and FS, and LP and IF were moderately negative, and that between IF and FS was moderately positive, indicating inter-dependence of the traits. Two QTL on chromosomes 1BL and 6BL were associated with LP and FS, and three QTL on chromosomes 1BL, 6BL and 2DS were associated with IF. Segregation of the RIL population in field experiment indicated that there were at least four and three adult plant resistance (APR) genes involved in resistance for leaf and stripe rust. Six QTL on chromosomes 3AL, 4AL, 1BL, 5BL, and 7BL were associated with APR for leaf rust, and seven QTL on chromosome 4AL, 5AL, 1BL, 2BL, 4BL, 5BL, 2DL, and 4D were associated with APR for stripe rust. Our results indicated that the major portion of genetic variability for slow-rusting resistance was additive gene action, and, to some extent, epistasis. In this research, we also explored the utility of remote sensing and geographic information systems (GIS) and analytical operations to discriminate leaf rust pustules from other parts of leaf and to accurately determine pustule size in 'Amadina' and 'Avocet S'.
Book Synopsis Identification of Quantitative Trait Loci (QTL) for Resistance to Stripe Rust in Wheat Variety TERRAL LA841 by : Alejandro Castro Aviles
Download or read book Identification of Quantitative Trait Loci (QTL) for Resistance to Stripe Rust in Wheat Variety TERRAL LA841 written by Alejandro Castro Aviles and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Genotyping by Multiplexed Sequencing in Barley and Stripe Rust Resistance in Wheat by : Jonathan Duran Eagle
Download or read book Genotyping by Multiplexed Sequencing in Barley and Stripe Rust Resistance in Wheat written by Jonathan Duran Eagle and published by . This book was released on 2021 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Genotyping by sequencing (GBS) and single nucleotide polymorphism (SNP) chip technologies are the primary SNP genotyping technologies used today. However, these genotyping technologies have some drawbacks that limit their usefulness in analysis. We have developed a robust protocol called genotyping by multiplexed sequencing (GMS) using SNP markers that provide informative genotypic data and greater flexibility. The genotypes derived from direct sequence reads reduce ambiguity in genetic analysis. The advantages of this protocol include: 1) This PCR-based direct sequencing protocol generates information from markers of interest and provides a more streamlined and accurate analysis process, by multiplexing hundreds of informative markers into a single sequencing run. 2) The marker sets are easily customized to the species of interest and can readily be changed. In this study we used the GMS protocol developed in wheat and adapted it to barley. We have identified 577 SNP markers that work well using this protocol providing adequate genome coverage for genomic selection and tag 267 QTLs for genes of interest. Good markers have a read depth of at least 5 amplicons and are reliably present across the population. Puccinia striiformis Westend. f. sp. tritici Erikss, causing wheat stripe rust, is an economically important pathogen of wheat (Triticum aestivum L.). The hexaploid club spring wheat cultivar JD contains both all-stage and adult plant resistance genes and is very resistant to stripe rust in the field. The objective of this study was to identify quantitative trait loci (QTL) for stripe rust resistance using a BC1F7 recombinant inbred line (RIL) population from parental line JD and backcross parent Avocet Susceptible (AvS). The population was phenotyped in field plots in Washington State at Pullman and Mount Vernon in 2014, 2015, and 2016. A major QTL conferring all-stage resistance from the JD background was identified on chromosome 1B using GBS markers. This QTL was further characterized with SSR markers and found to have the greatest effect at SSR marker WMC798, approximately 12 cM distal of WMC406. Additional QTL for adult-plant resistance were identified in the JD background on chromosomes 3A, 3B, 4A, 6B, and 7A having smaller effects.
Book Synopsis QTL Analysis of End-use Quality and Stripe Rust Resistance Traits in a Double Haploid Soft White Wheat Population by : Carmen Johanne Barkley
Download or read book QTL Analysis of End-use Quality and Stripe Rust Resistance Traits in a Double Haploid Soft White Wheat Population written by Carmen Johanne Barkley and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Wheat (Triticum spp.) is a crop of major economic and dietary importance. In the Pacific Northwest region of the United States, soft white wheat is the primary class of wheat grown and is an important export product for the region. Soft white wheat flour is especially important in producing products such as cookies, crackers, pancakes, noodles and pastry products. The goal of this project was to map quantitative trait loci (QTL) for end-use quality and stripe rust (Puccinia striiformis f. sp. tritici) resistance in a double haploid mapping population derived from a cross between a soft white winter club wheat, ‘Cara’, and a soft white winter lax wheat, ‘Xerpha’. The mapping population of 126 individuals was grown across 12 environments from 2013 to 2017 and rated for stripe rust resistance. In a separate experiment, it was grown in 16 different locations from 2013 to 2016 and phenotyped for 16 end-use quality traits. A linkage map of 23 linkage groups was constructed for the population using 1282 genotyping-by-sequencing (GBS) and KASP markers. QTL analysis revealed 35 significant QTL for stripe rust resistance. Two of the most interesting markers in the stripe rust resistance analysis were IWB38687 and A2927, which were each associated with three separate QTL. Analysis of the end-use quality trait data identified 22 significant QTL. Some of the most significant QTL identified for end-use quality traits had LOD scores well over five and explained over 15% of the variance in the trait they were associated with. Some of the markers identified in this study could be good targets for marker assisted selection in PNW wheat breeding programs, especially because the parents of our mapping population are commonly used in breeding programs in the PNW.
Book Synopsis Disease Resistance in Wheat by : Indu Sharma
Download or read book Disease Resistance in Wheat written by Indu Sharma and published by CABI. This book was released on 2012-01-01 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt: Disease resistance is one of the major factors that can be improved to sustain yield potential in cultivated crops. This book looks at disease resistance in wheat, concentrating on all the economically important diseases - their economic impact and geographical spread, breeding for resistance, pathogen variability, resistance mechanisms and recent advances made on resistance genes. Newer strategies for identifying resistance genes and identify resistance mechanisms are discussed, including cloning, gene transfer and the use of genetically modified plants. It is suitable for researchers and stu.
Book Synopsis QTL Mapping of Stem Rust Resistance Loci in Durum Wheat Populations by : Shitaye Homma Megerssa
Download or read book QTL Mapping of Stem Rust Resistance Loci in Durum Wheat Populations written by Shitaye Homma Megerssa and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Stem rust caused by Puccinia graminis f. sp. tritici Eriks. & Henn is the most destructive disease of durum and common wheat. The main focus of this study is to identify loci associated with stem rust resistance in durum wheat using association mapping and linkage mapping. A panel of 283 lines and 224 recombinant inbred lines (RILs) from a cross between 'Reichenbachii' and 'DAKIYE' developed by the durum wheat breeding program of the International Maize and Wheat Improvement Center (CIMMYT) were used for the study. The panel was evaluated against races TTKSK, TKTTF, JRCQC and TTRTF at the seedling stage and TKTTF and JRCQC in the field in Ethiopia from 2018 to 2019 for two seasons. The same panel was evaluated against bulk of multiple stem rust races prevalent in Ethiopia and Kenya from 2018 to 2019 in five environments. Genome-wide association study (GWAS) was conducted using 26,439 single nucleotide polymorphism (SNP) markers for seedling response (280 lines) and field response (283 lines) to stem rust. The RILs along with the two parents were evaluated for response to bulk of multiple stem rust races in Ethiopia and Kenya for two seasons from 2019 to 2020. Linkage analyses were conducted using 843 SNP markers for 175 lines. For GWAS of seedling response, a mixed linear model (MLM) identified 17 quantitative trait loci (QTL) of which eight were putatively novel while FarmCPU identified 20 QTL and 12 were likely novel. For field resistance to races TKTTF and JRCQC, MLM detected 19 QTL of which 12 were likely novel while FarmCPU detected 16 QTL and seven were putatively novel. For resistance to multiple Pgt races in East Africa, 160 significant marker-trait associations (MTAs) grouped into 42 QTL were identified using MLM and FarmCPU and 21 QTL were likely novel. From previously reported Sr genes, the regions of Sr7a, Sr8a, Sr8155B1, Sr11, Sr12, alleles of Sr13, Sr17, Sr22/Sr25, and Sr49 were identified. For the biparental population, composite interval mapping (CIM) identified three QTL on chromosomes 3B (QSr.cnl-3B), 4B (QSr.cnl-4B) and 7B (QSr.cnl-7B). These three QTL contributed by the resistant parent explained 4.7% to 15.3% of the phenotypic variation and all match previously reported loci. Lines with multiple-race stem rust resistance can be used as parents in durum wheat resistance breeding to stem rust and markers identified in the GWAS can be used in marker-assisted selection (MAS) once validated in a different population. Further study on the validation of allele specific markers and allelism tests in the Sr13 region of chromosome 6A is needed. Future evaluation of large numbers of durum wheat lines and searching for durable adult plant resistance gene is crucial in resistance breeding of durum wheat.
Book Synopsis Rust Diseases of Wheat by : Alan P. Roelfs
Download or read book Rust Diseases of Wheat written by Alan P. Roelfs and published by CIMMYT. This book was released on 1992 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Discovery and Fine Mapping of a Locus for Adult Plant Stripe Rust Resistance in Hexaploid Wheat by : Nicolas Cobo
Download or read book Discovery and Fine Mapping of a Locus for Adult Plant Stripe Rust Resistance in Hexaploid Wheat written by Nicolas Cobo and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Cereal rusts are among the most destructive plant diseases, and have affected human food supply for millennia. Wheat stripe rust, caused by Puccinia striiformis f. sp. tritici (Pst), is currently the most important of the three wheat rusts in California. Since the year 2000, the appearance of newer, more virulent and aggressive Pst races with tolerance to high temperatures has been associated with devastating epidemics worldwide and prompted the search for new sources of Pst resistance. In Chapter 1, four Pst resistance QTL effective against the new Pst races were identified using recombinant inbred lines (RILs) developed from a cross between the Argentinean varieties Klein Proteo and Klein Chajá. These QTL showed additive effects and they confer adequate levels of field resistance when combined. However, only QYr.ucw-1BL showed effective adult-plant resistance (APR) during the six years it was tested (P
Download or read book Wheat Rusts written by RA McIntosh and published by CSIRO PUBLISHING. This book was released on 1995-01-01 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although stem rust has been controlled by means of resistant cultivars, leaf and stripe rust continue as problems for many growing areas of the world. Wheat Rusts: An Atlas of Resistance Genes has been prepared by specialists from one of the leading international laboratories, and illustrates with colour photographs typical resistance phenotypes associated with most known genes for resistance to the three rust diseases of wheat. Relevant details for each gene include chromosome location, aspects of genetics and pathogen variation, the effects of environment on expression, origin, availability in genetic and breeding stocks, and use in agriculture. This atlas includes an introduction to host:pathogen genetics, methodologies for wheat rust research and breeding for resistance.
