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Identification Of The Gene Underlying The Rphq2 Resistance Of Barley Hordeum Vulgare To Barley Leaf Rust Puccinia Hordei
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Book Synopsis Identification of the Gene Underlying the Rphq2 Resistance of Barley (Hordeum Vulgare) to Barley Leaf Rust (Puccinia Hordei) by : Sudeep Subedi
Download or read book Identification of the Gene Underlying the Rphq2 Resistance of Barley (Hordeum Vulgare) to Barley Leaf Rust (Puccinia Hordei) written by Sudeep Subedi and published by . This book was released on 2017 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis High Resolution Mapping of RphMBR1012 Conferring Resistance to Puccinia Hordei in Barley (Hordeum Vulgare L.) by : Leila Fazlikhani
Download or read book High Resolution Mapping of RphMBR1012 Conferring Resistance to Puccinia Hordei in Barley (Hordeum Vulgare L.) written by Leila Fazlikhani and published by . This book was released on 2020* with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Barley, leaf rust resistance gene RphMBR1012, positional isolation.
Book Synopsis Genetic Analysis of Partial Resistance to Barley Leaf Rust (Puccinia Hordei) in the Oregon Wolfe Barleys by : R. Bouchon
Download or read book Genetic Analysis of Partial Resistance to Barley Leaf Rust (Puccinia Hordei) in the Oregon Wolfe Barleys written by R. Bouchon and published by . This book was released on 2009 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Quantitative Resistance to Leaf Rust (Puccinia Hordei) in Two Populations of Barley (Hordeum Vulgare) by : Ta Mingh Truong
Download or read book Quantitative Resistance to Leaf Rust (Puccinia Hordei) in Two Populations of Barley (Hordeum Vulgare) written by Ta Mingh Truong and published by . This book was released on 2004 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Molecular Mapping of Barley Genes for Resistance to Stripe Rust by : Guiping Yan
Download or read book Molecular Mapping of Barley Genes for Resistance to Stripe Rust written by Guiping Yan and published by . This book was released on 2006 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: Stripe rust, caused by Puccinia striiformis f. sp. hordei, is one of the most important diseases of barley ( Hordeum vulgare). Growing resistant cultivars is the best approach for controlling stripe rust. Grannenlose Zweizeilige (GZ) and BBA 2890 each have a recessive gene, temporarily designated as rpsGZ in GZ and rps1.a in BBA 2890, conferring seedling resistance against all races of P. striiformis f. sp. hordei identified thus far in the US. Bancroft was one of the first barley cultivars developed in the US with resistance to stripe rust, and has been identified as having durable high-temperature, adult-plant (HTAP) resistance.
Book Synopsis Polymorphism in the Rphq2 Region of Barley (Hordeum Vulgare L.) by : H.T. de Vries
Download or read book Polymorphism in the Rphq2 Region of Barley (Hordeum Vulgare L.) written by H.T. de Vries and published by . This book was released on 2015 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Resistance to Barley Leaf Rust (Puccinia Hordei Otth) in Wild Barley (Hordeum Spontaneum C. Koch) by : Linda Marie Treeful
Download or read book Resistance to Barley Leaf Rust (Puccinia Hordei Otth) in Wild Barley (Hordeum Spontaneum C. Koch) written by Linda Marie Treeful and published by . This book was released on 1988 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Cloning and Comparative Sequence Analysis of Powdery Mildew and Leaf Rust Resistance Gene Complements in Wild Barley by : B. J. Steffenson
Download or read book Cloning and Comparative Sequence Analysis of Powdery Mildew and Leaf Rust Resistance Gene Complements in Wild Barley written by B. J. Steffenson and published by . This book was released on 2021 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Our overall, long-term goal is to exploit the genetic diversity present in cereal wild relatives for the development of cultivars with durable disease resistance. Our specific objectives for this proposal were to: 1) Utilize Association Genetics Resistance Gene Enrichment Sequencing (AgRenSeq) to identify and clone powdery mildew and leaf rust resistance gene complements in wild barley and 2) Conduct comparative sequence analyses of the cloned resistance genes to elucidate the basis of their specificity and evolution. The deployment of resistant cultivars is the most effective, economically efficient, and environmentally sound means of controlling plant diseases, especially in small grain cereals. The systems selected for study in this proposal are barley (Hordeum vulgare ssp. vulgare, Hvv), its wild progenitor (Hordeum vulgare ssp. spontaneum, Hvs) and the powdery mildew (Blumeria graminis f. sp. hordei, Bgs) and leaf rust (Puccinia hordei, Ph) pathogens. We compiled a diverse panel of Hvs accessions (the Wild Barley Diversity Collection or WBDC; N = 314) from across its native range and evaluated it to 40 isolates of Bgs and 12 isolates of Ph. We obtained genomic DNA sequences enriched for Nucleotide Binding Site-Leucine Rich Repeat (NLR) type resistance genes for 203 WBDC accessions, plus cultivar Morex for which the first reference genome sequence of barley was based. We assembled the 250 bp Illumina sequencing reads into contigs using CLC assembly cell. From this effort, we successfully assembled the sequences of 201 WBDC accessions plus Morex and used NLR Parser to identify contigs containing NLR genes. AgRenSeq was then used to identify k-mers (short oligonucleotide sequences of length k) that were associated with resistance to each isolate of the two pathogens. This analysis was performed individually for all WBDC accessions and each individual pathogen race (9,898 host accession x pathogen race combinations). We visualized the results from these analyses in Manhattan plots and identified 311 and 144 peaks for powdery mildew and leaf rust resistance, respectively. The next step in the analysis was to identify the contigs associated with the peaks in the Manhattan plots. BLAST (Basic Local Alignment Search Tool) searches were employed to identify closely related contigs in other WBDC accessions or in Morex. We identified two candidate R genes that were only present in resistant WBDC accessions. One of these was present in seven WBDC lines and was associated with resistance to four leaf rust isolates. BLAST analysis of this gene revealed that it was Rph15, one of the most widely effective leaf rust resistance genes reported in Hordeum. This gene was cloned and functionally validated in association with our Australian colleagues (Cheng et al., 2021). We are currently in the process of cloning six of other resistance genes: four for powdery mildew and two for leaf rust. As the contigs do not contain much of the promoter sequences, we have employed a genome walking approach to identify 2,500 bp of promoter sequence. To speed up and simplify the cloning of resistance genes from the WBDC, the PI established the International Wild Barley Sequencing Consortium (IWBSC; https://iwbsc.umn.edu/) comprised of over 60 researchers from 14 different countries and raised over $150,000 through crowdfunding to pay for 10X depth sequence coverage. Genome-wide association study (GWAS) of whole genome sequencing (WGS) data identified extremely strong and clear signals of association for several resistance genes which will facilitate gene cloning in concert with a wild barley pan-genome currently under construction. The cloning of multiple resistance gene can facilitate the development of durably resistant cultivars by inserting, through transgenesis, cassettes of multiple resistance genes.
Book Synopsis Identification and Mapping of Genes for Partial Resistance to Puccinia Hordei Otth in Barley by : Xiaoquan Qi
Download or read book Identification and Mapping of Genes for Partial Resistance to Puccinia Hordei Otth in Barley written by Xiaoquan Qi and published by . This book was released on 1998* with total page 165 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Mapping of Resistance Genes in Barley (Hordeum Vulgare L.) to Oat Stem Rust Pathogen, Puccinia Graminis F. Sp. Avenae by : Moureen Nansamba
Download or read book Mapping of Resistance Genes in Barley (Hordeum Vulgare L.) to Oat Stem Rust Pathogen, Puccinia Graminis F. Sp. Avenae written by Moureen Nansamba and published by . This book was released on 2015 with total page 45 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Identifying Quantitative Trait Loci for Partial Resistance to Isolate 24 of Puccinia Hordei in Barley, Hordeum Vulgare L., in the Field by : Bianca van Haperen
Download or read book Identifying Quantitative Trait Loci for Partial Resistance to Isolate 24 of Puccinia Hordei in Barley, Hordeum Vulgare L., in the Field written by Bianca van Haperen and published by . This book was released on 1999 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Testing the Effectiveness of Barley Stripe Rust Resistance QTL Detected in Mexico and the USA Against a Possible New Race in Peru and Mapping of Genes Conferring Resistance to Leaf Rust and Mildew in the Same Population by : Carlos Rossi
Download or read book Testing the Effectiveness of Barley Stripe Rust Resistance QTL Detected in Mexico and the USA Against a Possible New Race in Peru and Mapping of Genes Conferring Resistance to Leaf Rust and Mildew in the Same Population written by Carlos Rossi and published by . This book was released on 2005 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: Barley is the fourth most important cereal crop in the world because of its broad adaptation, its utility as a feedstock and for human food, and the superior properties of barley malt for brewing. Three of the most important foliar diseases of barley, on a worldwide level are: barley leaf rust caused by Puccinia hordei G. Otth, barley stripe rust (yellow rust) caused by Puccinia striformis Westend f sp. hordei and powdery mildew caused by Blumeria graminis f. sp. hordei. Although barley is an autogamous species, there is sufficient DNA-level diversity for efficient linkage map construction and this polymorphism has been used for extensive mapping and QTL detection efforts. The ICARDA/CIMMYT barley program is an important source of quantitative disease resistance genes. Oregon State University and the ICARDA/CIMMYT barley program have maintained a long-term collaborative effort to map and deploy stripe rust resistance genes. This germplasm has shown consistent and adequate levels of resistance over the past 18 years in repeated tests in Mexico and the USA. However, in the 1999-2000 season there were reports from Peru, Bolivia, and Ecuador that there was a new race of stripe rust that was causing high levels of disease on formerly resistant varieties and experimental materials. This was cause of concern because considerable effort had been invested in identifying stripe rust quantitative resistance genes, based on the assumption that they would prove durable. We therefore used a well-characterized barley QTL mapping population - the ORO population - which is derived from the cross of BCD47 x Baronesse, to determine if barley stripe resistance QTL mapped in Mexico and the USA were effective in Peru. The same resistances QTL were detected in Peru as in Mexico and the USA. If there is a new virulence in Peru, the mapped QTL are still effective and under field conditions do not show specificity to any race the population has been challenged with in the Americas. This finding is of importance to barley breeders interested in deploying effective resistance genes. Confirmation of a new race in Peru will require characterization against a standard set of differentials, an experiment that is planned. The increase in disease severity of C110587, a genotype with a mapped qualitative resistance gene, between Mexico and Peru suggests there is a new race in Peru. The highest levels of resistance in Peru were achieved in lines where the qualitative resistance gene was pyramided with quantitative resistance alleles. We also used the ORO population to map QTL for barley leaf rust and barley powdery mildew in the Andean region and for the latter disease identified resistance QTL in addition to the Mia resistance mapped using specific isolates under controlled conditions. The availability of this germplasm, with mapped genes conferring quantitative resistance to three diseases, will be a resource for the barley breeding community.
Book Synopsis Investigation of Puccinia Graminis Resistance Genes in Barley by : Robert Saxon Brueggeman
Download or read book Investigation of Puccinia Graminis Resistance Genes in Barley written by Robert Saxon Brueggeman and published by . This book was released on 2009 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Nonhost Resistance to Rusts (Puccina Sp.) in Barley (Hordeum Vulgare L.) by : D. Bomhoff
Download or read book Nonhost Resistance to Rusts (Puccina Sp.) in Barley (Hordeum Vulgare L.) written by D. Bomhoff and published by . This book was released on 2014 with total page 95 pages. Available in PDF, EPUB and Kindle. Book excerpt: The identification of genes conferring nonhost resistance (NHR) is a crucial step in its understanding and usage in breeding. The Barley(Hordeum vulgare L.)-Puccinia (rust fungi) model system uses marginal hosts of barley to Puccinia rusts to study NHR, making the identification of NHR genes possible. This study entails the fine mapping work of two NHR genes; one located on the introgression of the NIL SusQ11, near Rphq11, and the other located on L94.
Book Synopsis Location of Genes Conditiioning Resistance of Barley to Leaf Rust (Puccinia Hordei Otth) by : James Russell Larkins
Download or read book Location of Genes Conditiioning Resistance of Barley to Leaf Rust (Puccinia Hordei Otth) written by James Russell Larkins and published by . This book was released on 1982 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Analysis of Genetic Resistance to Barley Stripe Rust (Puccinia Striiformis F. Sp. Hordei) by : Doris A. Prehn
Download or read book Analysis of Genetic Resistance to Barley Stripe Rust (Puccinia Striiformis F. Sp. Hordei) written by Doris A. Prehn and published by . This book was released on 1993 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: Stripe rust (Puccinia striiformis f. sp. hordei) is a serious disease of barley that can cause up to 70% yield loss in susceptible varieties. The fungus is moving northward, threatening major barley production areas in the US, where most cultivars are susceptible. Fungicides are available for control of stripe rust, but economic and environmental considerations favor genetic resistance. Two stripe rust resistance quantitative trait loci (QTLs) located in chromosomes 4 and 7 have previously been reported. One hundred and ten doubled haploid progeny from a stripe rust susceptible x resistant cross were derived using the Hordeum bulbosum technique and phenotyped for agronomic and malting quality traits in order to assess the importance of linkage drag associated with the mapped stripe rust resistance QTLs. Data on 33 markers were combined with phenotypic data for QTL analysis. A molecular marker-assisted backcross program was implemented to initiate the transfer of the stripe rust resistance loci into susceptible US germplasm. No negative QTLs for agronomic or malting quality traits were detected within or adjacent to the intervals that were targeted for marker-assisted selection. A minor leaf rust resistance QTL, however, was found adjacent to the stripe rust locus on chromosome 7. Linkage drag in this region could operate in favor of the breeder. Epistatic interaction between the two stripe rust resistance QTLs confirms the necessity of introgressing both chromosome intervals.
Book Synopsis Study of Partial Resistance to Barley Leaf Rust (Puccinia Hordei) in Steptoe X Morex Population by : Alice Lorriaux
Download or read book Study of Partial Resistance to Barley Leaf Rust (Puccinia Hordei) in Steptoe X Morex Population written by Alice Lorriaux and published by . This book was released on 2009 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
