Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 30 for “"Pyramiding"”.
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Pyramiding Disease Resistance Genes In Wheat (Triticum aestivum L.)
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 …
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Simultaneous Mapping and Pyramiding of Fusarium Head Blight Resistance Loci in Wheat Breeding Populations
… and marker-assisted breeding efforts aimed at pyramiding QTL, since no direct bridge exists between the populations within which these activities are conducted. Through this body of research, we demonstrate the application of linkage analysis directly in wheat breeding populations to enable …
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Organization as a pyramiding, n-dimensional network of interconnected and overlapping closed loop information feedback systems
The theory of organization that this thesis proposes possesses a characteristic plasticity that should enable it to span the gap that has traditionally existed between the two broad types of current organizational theories. Generally, one type of theory proposes to describe how organizations should …
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An ex ante economic impact analysis of developing low cost technologies for pyramiding useful genes from wild relatives into elite progenitors of cassava
… of developing low cost technologies for pyramiding useful genes from wild relatives into elite progenitors of cassava in Nigeria, Ghana and Uganda. More specifically, it estimates the change in economic surplus generated by introducing cassava varieties with tolerance to cassava mosaic …
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Residual gene resistance using the crown rust of oats pathosystem
… lacking the corresponding avirulence genes. Pyramiding resistance genes may produce durable, effective resistance against many pathogen races. This hypothesis was tested in three experiments using the crown rust of oats pathosystem.
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Computer simulation to guide choice of breeding strategies for maker-aided multiple trait integration in maize
… four steps: Single Event Introgression, Event Pyramiding, Trait Fixation, and Version Testing. We considered the breeding process to introgress 15 transgenic events into a target maize hybrid, incorporating 8 into the female parent and 7 into the male parent, to design a comprehensive and …
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Estimation of the Scale of Injury according to Severity
… current conditions of injury by estimating and pyramiding intention and the scale of injury mechanisms according to intention, and to find the characteristics of the pyramid according to injury mechanisms. METHOD: The current conditions of injury of each county were grasped by conducting complex …
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Quantitative Trait Loci for Resistance to Fusarium Head Blight in the Hulless Winter Barley Cultivar Eve
… cultivars that are developed through gene pyramiding and incorporation of various sources of resistance. Resistance identified in winter barley cultivar Eve has been identified in Virginia Tech's Small Grains Breeding Program. The objectives of this study are to validate resistance and …
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Background-dependent genetic architecture of Fusarium head blight resistance in U.S. hard winter wheat
… indicating diminishing returns from pyramiding all three loci. Genome-wide characterization using GBS-derived sliding window bin maps showed recurrent-parent genome recovery ranged from 78.8% to 90.3% and substantial differences in donor genome retention and recombination patterns …
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Identification of Native FHB Resistance QTL in the SRW Wheat Cultivar Jamestown
… marker-assisted selection (MAS) can be used in pyramiding these and other known QTL into elite backgrounds. Types of resistance assessed in this study include: Type I (resistance to initial infection; incidence), Type II (resistance to spread in wheat spike; severity), and decreases in mycotoxin …
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Genomic and Physiological Approaches to Improve Drought Tolerance in Soybean
… SNPs may be an important resource for pyramiding genes to improve drought tolerance and for identifying parental genotypes for use in breeding programs. </p>
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Identification and Mapping of Adult Plant Stripe Rust Resistance in Soft Red Winter Wheat
… markers will facilitate the incorporation and pyramiding of stripe rust resistance QTL into SRW wheat lines via marker-assisted selection.
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QTL discovery for Japanese beetle resistance in aphid-resistant germplasm, stacking aphid-resistant genes, and metabolite profiling studies in soybean
… stack <Rag1> and <rag3> aphid-resistant genes. Pyramiding multiple resistance genes, particularly with different modes of action, has great potential to provide durable resistance. This dissertation also reports MSU soybean breeding program's research on stacking <rag3>, <rag4>, <rag1b>, and …
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Interactions of soybean Rsv genes and Soybean mosaic virus
… of SMV tested and show great potential for gene pyramiding efforts to ensure a wider and more durable resistance to SMV in soybeans.
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Molecular Mapping Of A Soybean Mosaic Virus (SMV) Resistance Gene In Soybean (Glycine Max)
… are useful in marker-based selection (MAS), pyramiding viral resistance genes and in cloning the Rsv3 gene.
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Molecular mapping of quantitative trait loci (QTL) for Fusarium head blight (FHB) resistance and agronomic traits in US hard winter wheat
… the high SNS allele at the QTL on 2BS and 7AL. Pyramiding those FHB resistance QTL with positive alleles for spike and grain traits from different chromosomes may simultaneously improve FHB resistance and grain yield in new cultivars.
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Genetic Characterization and Linkage Mapping of Barley Net Blotch Resistance Genes
… will facilitate future efforts in pyramiding multiple independent genes for net blotch resistance.
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Utilization of tall wheatgrass translocation lines to improve fusarium head blight resistance in wheat
… in six adapted wheat lines. The effect of pyramiding resistance genes through marker-assisted selection was assessed by scoring plants for disease development after inoculating with a combination of four different local FHB isolates. The response of 6 populations of pyramided lines was …
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Marker assisted selection and breeding for desirable thinner pericarp thickness and ear traits in fresh market waxy corn germplasm
… be effective for reducing pericarp thickness. Pyramiding significant favorable marker alleles showed reduction of pericarp thickness on all kernel regions. Since testcross performance (TP) is ultimately more important than per se line performance (LP), a testcross population was generated for …
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Genetic Resistance to the Downy Mildew Pathogen and Breeding towards Durable Disease Management in Spinach
… <p>Furthermore, a broader approach of gene pyramiding was used to stack the three Resistance to Peronospora farinosa (RPF) loci namely, RPF1, RPF2, and RPF3 resulting in stacking of three loci in a single spinach line and two loci in fifteen spinach lines. These findings will thus be useful …
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