Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Download Inheritance And Quantitative Trait Loci Analysis Of Leaf Rust Resistance In Wheat full books in PDF, epub, and Kindle. Read online Inheritance And Quantitative Trait Loci Analysis Of Leaf Rust Resistance In Wheat ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Author : Julia Xiuling Zhang
Publisher :
ISBN 13 :
Total Pages : 226 pages
Book Rating : 4.:/5 (319 download)
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:
Author : Xianming Chen
Publisher : Springer
ISBN 13 : 9402411119
Total Pages : 723 pages
Book Rating : 4.4/5 (24 download)
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.
Author : Izabela L. Ciechanowska
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (133 download)
Download or read book Quantitative Trait Loci Mapping of Rust Resistance and Agronomic Traits in the Doubled Haploid Spring Wheat Population 'HYAYT12-10' × 'GP146' written by Izabela L. Ciechanowska and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Marker-assisted selection requires the identification of molecular markers associated with major genes and quantitative trait loci (QTL) using linkage analysis. In this study, we used 167 doubled haploid (DH) lines derived from two unregistered spring wheat (Triticum aestivum L.) parental lines that belong to the Canada Western Special Purpose (CWSP) class to map QTLs associated with five traits using inclusive composite interval mapping (ICIM). Using ICIM, least square means phenotype data across 3-4 environments, and a genetic map of 2,676 SNPs out of the wheat 90K SNP array, we identified ten QTLs associated with maturity (4A and 5B), plant lodging (4B, 5A, 5D, and 7D), grain yield (2D), leaf rust (4A) and stem rust (1A and 2B). Each QTL individually accounted for 6.0-22.3% of the phenotypic variance and together accounted for 8.6-38.2% of each trait. QTLs identified for rusts using ICIM had a minor effect (6.0-9.0%) or a major effect (22.3%). Our major effect QTL at 22.3% was discovered on chromosome 2B and contributed to stem rust response. Its physical location has been associated with disease response in previous studies. Results from this study provide additional valuable information to wheat researchers, in particular that the area on chromosome 2B should be considered for future analyses.
Author : Bhoja Basnet
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (813 download)
Download or read book Molecular Characterization of Durable Yellow and Leaf Rust Resistance in Two Wheat Populations written by Bhoja Basnet and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Wheat (Triticum aestivum L.) is one of the most important food crops, comprising the largest source of daily calorie and protein intake of human beings worldwide. Among the several diseases of wheat, Yellow Rust (YR; caused by Puccinia striiformis Westend. f. sp. tritici) and Leaf Rust (LR; caused by Puccinia triticina Erikss. & Henn.) have always been major production constraints since the domestication of wheat. For the last few decades, scientists have invested large efforts to identify, characterize and utilize Adult Plant Resistance (APR), a.k.a. slow rusting resistance, in wheat germplasm to promote durability of resistance against rust. The objectives of this study were to 1) understand the genetics of APR to YR and/or LR present in two potential wheat lines 'Quaiu 3' and 'TAM 111', and 2) map the putative Quantitative Trait Loci (QTL) associated with YR and LR resistance using DNA-based molecular markers. Two Recombinant Inbred Line (RIL) populations were subjected to YR and LR disease evaluation experiments in multiple years and locations. Visual evaluation of Disease severity (DS) and Infection Type (IT) score in both RIL populations showed that APR to YR and LR were highly heritable quantitative traits with significant correlation among experiments. In spring wheat population, composite interval mapping consistently detected four and three large effect QTL for YR and LR resistance, respectively. Among those QTLs, 1B, 3B and 1D QTL were found to be associated with previously characterized genes Lr46/Yr29, Sr2/Yr30 and Lr42, respectively. However, QTLs QYr.tam-3D and QYr.tam-2D were potentially novel. The largest YR QTL QYr.tam-2D was located on long arm of chromosome 2D explaining about 48 to 61% of the total phenotypic variation. Similarly, in winter wheat population, apart from three environment-specific QTL on chromosomes 1A, 2A and 7D, the QTL on chromosome 2B (QYr.tam-2B) was found to express consistently in multiple environments explaining about 23 to 63% of total phenotypic variation. This study has further elucidated the inheritance mechanism of APR to YR and LR present in two different wheat lines, Quaiu 3 and TAM 111, and resulted in the successful mapping and characterization of the genetic loci associated with corresponding disease resistance traits. These findings should be very useful to isolate the novel APR genes and/or directly use in wheat breeding programs to enhance durable rust resistance in diverse wheat germplasm and cultivars in the future.
Author : Yue Lu
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (95 download)
Download or read book Genetic Mapping of Quantitative Trait Loci for Slow-rusting Traits in Wheat written by Yue Lu and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Wheat leaf rust, caused by Puccinia triticina, is an important fungal disease worldwide. Growing resistant cultivars is an effective practice to reduce the losses caused by the disease, and using slow-rusting resistance genes can improve the durability of rust resistance in the cultivars. CI13227 is a winter wheat line that shows a high level of slow-rusting resistance to leaf rust and has been studied extensively. In this research, two recombinant inbreed line (RIL) populations derived from CI13227 x Suwon (104 RILs) and CI13227 x Everest (184 RILs) and one doubled haploid (DH) population derived from CI13227 x Lakin with 181 lines were used to identify quantitative trait loci (QTLs) for slow leaf rusting resistance. Each population and its parents were evaluated for slow-rusting traits in two greenhouse experiments. A selected set of 384 simple sequence repeat markers (SSRs), single nucleotide polymorphism markers (SNPs) derived from genotyping-by-sequencing (GBS-SNPs) or 90K-SNP chip (90K-SNPs) were analyzed in the three populations. Six QTLs for slow-rusting resistance, QLr.hwwgru-2DS, QLr.hwwgru-7BL, QLr.hwwgru-7AL, QLr.hwwgru-3B_1, QLr.hwwgru-3B_2, and QLr.hwwgru-1D were detected in the three populations with three stable QTLs, QLr.hwwgru-2DS, QLr.hwwgru-7BL and QLr.hwwgru-7AL. These were detected and validated by Kompetitive Allele-Specific PCR (KASP) markers converted from GBS-SNPs and 90K-SNPs in at least two populations. Another three QTLs were detected only in a single population, and either showed a minor effect or came from the susceptible parents. The KASP markers tightly linked to QLr.hwwgru-2DS (IWB34642, IWB8545 and GBS_snpj2228), QLr.hwwgru-7BL (GBS_snp1637 and IWB24039) and QLr.hwwgru-7AL (IWB73053 and IWB42182) are ready to be used in marker-assisted selection (MAS) to transfer these QTLs into wheat varieties to improve slow-rusting resistance in wheat.
Author : International Maize and Wheat Improvement Center
Publisher : CIMMYT
ISBN 13 : 9789686127232
Total Pages : 164 pages
Book Rating : 4.1/5 (272 download)
Download or read book Breeding Strategies for Resistance to the Rusts of Wheat written by International Maize and Wheat Improvement Center and published by CIMMYT. This book was released on 1988 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Joseph Hahn
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (134 download)
Download or read book QTL Analysis of Wheat Leaf Rust Resistance in the 'Lakin' X 'Roelfs F2007' Backcross Population written by Joseph Hahn and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Leaf rust, caused by the fungus Puccinia triticina, is a major disease of wheat in North America. Breeding efforts to achieve resistance have historically been plagued by a cycle in which an all-stage resistance gene is discovered, deployed, and rapidly defeated, thus wasting valuable sources of resistance. Adult-plant resistance genes, however, can potentially contribute to race-nonspecific resistance to the pathogen which is durable for many years. In this study, the moderately susceptible Kansas winter wheat cultivar, 'Lakin', was backcrossed to the CIMMYT-developed spring wheat cultivar, 'Roelfs F2007', which is known to possess very good adult-plant resistance (APR) to leaf rust. The 297 BC1F6-derived progeny of this cross were screened for resistance in five location-years at field nurseries in Kansas and Texas, as well as in two greenhouse studies. Genotyping-by-Sequencing (GBS) generated 2,541 high-quality genome-wide markers used for the construction of a linkage map covering all 21 chromosomes. Quantitative trait locus (QTL) analysis identified reproducible APR QTLs on chromosome arms 3BS, 5DS, 7BS, and 7BL. Three QTLs contributed by Roelfs F2007 appeared to correspond to locations of known APR genes Lr74 (3BS), Lr78 (5DS), and Lr68 (7BL). The APR QTL on 7BS contributed by Lakin appeared to be novel. Together, the four QTLs accounted for 45% and 46% of the variation in least-squares means for disease severity and infection type, respectively. These results confirm that both Roelfs F2007 and Lakin contain APR loci which may be used in breeding for resistance to infections by P. triticina.
Author : Z. Eyal
Publisher : CIMMYT
ISBN 13 : 9789686127065
Total Pages : 56 pages
Book Rating : 4.1/5 (27 download)
Download or read book The Septoria Diseases of Wheat written by Z. Eyal and published by CIMMYT. This book was released on 1987 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Peter Michael Bulli Nyori
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (656 download)
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'.
Author : Xiangyu (Bruce) Pei
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (135 download)
Download or read book Genetic Mapping of Leaf Rust (Puccinia Triticina Eriks.) Resistance in Durum Wheat (Triticum Turgidum Var. Durum L.). written by Xiangyu (Bruce) Pei and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Leaf rust, caused by Puccinia triticina Eriks. (Pt = P. recondita Rob. Ex Desmaz. F. sp. tritici), is an economically significant pathogen affecting durum wheat (Triticum turgidum var. durum L.) crops worldwide. Genetic resistance is one of the most effective and environmentally friendly methods to control leaf rust in wheat. New sources of resistance genes need to be identified due to the threat of new Pt races to durum wheat production. Marker assisted selection (MAS) is a highly efficient method to select resistance genes in breeding programs particularly to pyramid multiple resistance genes in new varieties. The objective of this study was to characterize and map leaf rust resistance genes in a Canadian durum wheat Strongfield. A double haploid (DH) mapping population of 87 DH lines was developed from the cross Strongfield/Blackbird. Seedling rust tests with Pt isolates 12-3 MBDS, 06-1-1 TDBG, 128-1 MBRJ, 74-2 MGBJ, and 77-2 TJBJ revealed a single hypersensitive leaf rust resistance gene. Three genes segregated for resistance to isolate 1-1 BBBD at the seedling stage, one of which controlled resistance to the other five Pt isolates. Blackbird contributed one of the seedling resistance genes effective against isolate 1-1 BBBD. Parental lines and 87 DH lines were genotyped using the Illumina Infinium assay with the iSelect 90K wheat SNP array. A database search using the DNA sequences of linked markers provided a putative location in the Chinese Spring reference genome sequence. The gene conferring resistance to the six isolates used in the study mapped to the long arm of chromosome 3A and was temporarily designated as LrStr_3A. No leaf rust resistance gene has been detected in this region previously. Quantitative trait locus (QTL) analysis identified eight QTL controlling leaf rust resistance in field leaf rust nurseries. One of these QTL mapped to chromosome 3AL as the same region of LrStr_3A. Another QTL mapped to the expected location of the adult plant resistance (APR) gene Lr46 based upon the marker csLV46G22. Kompetitive allele-specific PCR (KASP) markers were developed for LrStr_3A that will be useful for MAS.
Author :
Publisher :
ISBN 13 : 9789861958774
Total Pages : 5 pages
Book Rating : 4.9/5 (587 download)
Download or read book Summary Record of the 7th Meeting (closed), Held at Headquarters, New York, on Friday, 26 August 2005 written by and published by . This book was released on 2005 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Paul J. Kramer
Publisher :
ISBN 13 :
Total Pages : 500 pages
Book Rating : 4./5 ( download)
Download or read book Plant & Soil Water Relationships: A Modern Synthesis written by Paul J. Kramer and published by . This book was released on 1969 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Onoufrios Agathoclis Philippou
Publisher :
ISBN 13 :
Total Pages : 182 pages
Book Rating : 4.:/5 (299 download)
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:
Author : Douglas R. Knott
Publisher : Springer Science & Business Media
ISBN 13 : 3642836410
Total Pages : 213 pages
Book Rating : 4.6/5 (428 download)
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.
Author : Mitra Serajazari
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (125 download)
Download or read book Pyramiding Disease Resistance Genes In Wheat (Triticum Aestivum L.). written by Mitra Serajazari and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The major goal of this study was to accumulate plant disease resistance QTL (Quantitative Trait Loci) and genes to Fusarium head blight (FHB), leaf rust (Lr), Septoria tritici blotch (STB) and barley yellow dwarf virus (BYDV) in wheat. Two winter and two spring wheat cultivars were crossed and seven generations of spring wheat were developed in three years. Fifty percent of the F3 and 20% of the F5 population showed low severity to both leaf rust and Septoria tritici blotch. Analysis of QTL tagged by molecular markers showed an epistatic effect of an Xgwm533 allele (associated with type II resistance to FHB) on an unknown allele in the F5 population. The relationships between the leaf rust resistance gene Lr34 and Fusarium toxin deoxynivalenol (DON) were not significant. Biplot analyses of the F3 and derived F5 populations demonstrated that the associations between molecular markers and disease resistance were heritable and that genotypic screening can be used in early generations in a small population. Pre-screening of a doubled haploid (DH) wheat population with molecular markers demonstrated that the resistant Xgwm533 allele from Sumai3 had no negative effect on yield whereas the effects of other QTL on yield remains to be determined. Two sources of FHB resistance (25R51 and RCATL31) were incorporated into the DH population and 6% of DH lines displayed a lower FHB incidence than the parent line 25R51 indicating improved FHB resistance in this population.
Author : Shitaye Homma Megerssa
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (14 download)
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.
Author : Antonio J. Márquez
Publisher : Springer Science & Business Media
ISBN 13 : 9781402037344
Total Pages : 416 pages
Book Rating : 4.0/5 (373 download)
Download or read book Lotus japonicus Handbook written by Antonio J. Márquez and published by Springer Science & Business Media. This book was released on 2005-10-26 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: Legumes are very important plants playing a central role in biological research. They are a key component of sustainable agricultural systems because of symbiotic nitrogen fixation and other beneficial symbiosis with mycorrhizal fungi. Studies on most of the major leguminous crops are hampered by large genome sizes and other disadvantages which have hindered the isolation and characterisation of genes with important roles in legume biology and agriculture. For this reason Lotus japonicus was chosen as a model species for legume research some ten years ago. Since then, many groups around the world have adopted Lotus as a model and have developed numerous resources and protocols to facilitate basic and applied research on this species. This handbook represents the first effort to compile basic descriptions and methods for research in Lotus, including symbiotic processes, cell and molecular biology protocols, functional genomics, mutants, gene tagging and genetic analysis, transformation and reverse genetic analysis, primary and secondary metabolism, and an exhaustive update of the scientific literature available on this plant.
