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 20 for “"Resistance loci"”.
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Simultaneous Mapping and Pyramiding of Fusarium Head Blight Resistance Loci in Wheat Breeding Populations
… to enable markerassisted pyramiding for FHB resistance QTL. In the first study, we apply multipoint linkage analysis of general pedigrees to early generation wheat breeding populations for development of dense framework linkage maps. Using this approach, a linkage map consisting of 3,807 loci …
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Evaluation and Identification of Soybean Aphid Resistance Sources and Mapping of Soybean Aphid Resistance Loci in Early Maturing Soybean Germplasm Accessions
… United States. Identification of soybean aphid resistance sources in early-maturing soybeans and genetic characterization of new sources of resistance will facilitate to expand the gene pool of soybean aphid resistance and thus will help to develop soybean aphid resistant cultivars. To identify …
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Integrating Genomics and Metabolomics to Inform Breeding for Powdery Mildew Resistance in Grapevine
Two powdery mildew resistance loci have been identified using pedigree-connected F1 mapping families at the University of Minnesota grape breeding program. A consensus linkage map of the resistant parent (MN1264) was developed for genetic mapping. The resistance loci were mapped on chromosomes 2 …
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A genome-wide association study of resistance to the yellow rust pathogen (Puccinia striiformis f. sp. tritici) in elite UK wheat germplasm
… 2013 A genome wide association study of resistance to the yellow rust pathogen (Puccinia striiformis f. sp. tritici) in elite UK wheat germplasm Identification of marker-trait associations (MTA) in germplasm relevant to breeding program via association mapping (AM) can be an effective way …
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Genetic Resistance to the Downy Mildew Pathogen and Breeding towards Durable Disease Management in Spinach
… for establishing the basis of durable disease resistance development against the downy mildew pathogen (P. effusa 13) in spinach, through the use of various genome engineering approaches.</p> <p>Our results have led (Chapter 2) to the identification of potential stage specific resistance genes …
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Dissecting the genetic basis of wheat yellow rust resistance in the NIAB Elite MAGIC population
… outbreaks and have jeopardised wheat yellow rust resistance levels in the main wheat-producing regions globally. Widespread epidemics have been further facilitated by the deployment of genetically uniform material underpinned by major resistance over large areas. With such a rapidly changing Pst …
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[EMBARGOED] Analysis of cereal cyst nematode resistance mechanisms in barley
… approach for nematode management and four resistance loci, Rha1, Rha2, Rha3 and Rha4, have been mapped. The Rha4 locus was mapped in the Galleon/Haruna Nijo population to chromosome 5H and since Rha2 and Rha4 provide the most effective resistance against the Australian H. avenae pathotype …
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Genome-wide sequencing and an open reading frame analysis of DDT susceptible (91-C) and resistant (91-R) Drosophila melanogaster laboratory populations
DDT resistance in the Drosophila melanogaster resistant (91-R) and susceptible (91-C) fly lines has been previously examined for differential expression of transcripts and proteins. Here I present the first whole genome sequencing analysis of the 91-R and 91-C fly lines to identify structural …
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Identification, Validation, and Mapping of Phytophthora sojae and Soybean Mosaic Virus Resistance Genes in Soybean
… abiotic stresses. This research is focused on resistance to biotic disease stress in soybean. In particular, we are working on the Phytophthora soja (P. sojae) and Soybean Mosaic Virus (SMV) systems. For each of these diseases, we are working to develop superior soybean germplasm that is …
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Identifying loci conferring quantitative disease resistance in sorghum and maize against fungal foliar pathogens
… themselves against pathogens. Broadly disease resistance can be split into qualitative and quantitative resistance. In qualitative resistance the presence of a single resistance gene (R gene) confers complete resistance against the pathogen. R proteins can interact directly as receptors or …
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Genética e mapeamento molecular da resistência parcial à ferrugem da folha da aveia (Avena sativa L.)
… à resistência quantitativa (“quantitative resistance loci” ou QRLs). Resultados de três anos evidenciaram alta influência do ambiente na expressão da resistência, apresentando, entretanto, variabilidade genética para resistência parcial nas populações segregantes. A distribuição de …
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Elucidating the molecular genetics of host and nonhost resistance in barley to stripe rust
… As such, they are described as nonhosts. Nonhost resistance is often conceptualised as a qualitative separation from host resistance. Classification into these two states is generally facile, as they fail to fully describe the range of states that exist in the transition from host to nonhost. This …
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A Genome Wide Association Study for Fusarium Head Blight Resistance in Southern Soft Red Winter Wheat
… evaluate soft red winter wheat (SRWW) lines for resistance to FHB in terms of resistance to initial inoculum (incidence); resistance to spread within the head (severity); resistance to DON accumulation; and resistance to Fusarium damaged kernels (FDK), 2) determine the frequency and effect of …
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Resistance to anthracnose leaf blight in sorghum
… the pathogen. Qualitative and quantitative host resistance has been reported for anthracnose leaf blight. However, the evolving nature of the pathogen increases the need to identify more resistance sources that are effective against isolates collected from different locations. In addition, little …
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Genetic and molecular characterisation of metabolic subphenotypes and their contribution to type 2 diabetes aetiology
… the identification of hundreds of genetic loci contributing to T2D risk. However, understanding how these loci contribute to the aetiological complexity of T2D has been more challenging. Using an interdisciplinary approach this thesis aimed to investigate the genetic contribution to T2D, …
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The oat-crown rust pathosystem: an interaction of a plant, a pathogen, and time
… time, by a process of selection, to defeat the resistances deployed in crop cultivars. The genetic architecture of disease resistance changes as a plant grows from a seedling to an adult plant, matures, and dies. The visual and spectral signature of plant stress and disease also changes as the …
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Initial Fine Mapping of the Spinach Downy Mildew Resistance Locus RPF1
… studies have been published on the genetics of resistance to <em>Pfs </em>. However, several more recent studies on the genetics of resistance have been conducted and it has been hypothesized that there are at least six resistance loci (RPF1-RPF6) which control resistance to <em>Pfs </em> races …
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Evaluation for drought tolerance and anthracnose resistance of selected pinto genotypes of common bean (phaseolus vulgaris l.).
… were evaluated for tolerance to drought and resistance to seven races of C. lindemuthianum. Evaluation for drought tolerance was conducted using one pot experiment and two field trials. For the pot experiment, Electrolyte leakage and canopy temperature depression was measured on the 56 pinto …
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Evaluation for drought tolerance and anthracnose resistance of selected pinto genotypes of common bean (phaseolus vulgaris l.).
… were evaluated for tolerance to drought and resistance to seven races of C. lindemuthianum. Evaluation for drought tolerance was conducted using one pot experiment and two field trials. For the pot experiment, Electrolyte leakage and canopy temperature depression was measured on the 56 pinto …
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AN INTEGRATED APPROACH TO THE DEVELOPMENT OF RESISTANCE TO COMMON BACTERIAL BLIGHT IN COMMON BEAN (PHASEOLUS VULGARIS)
… can reduce yields by up to 45 %. Breeding for resistance is the most sustainable control strategy, yet resistance is quantitative and influenced by pathogen diversity. Most known quantitative trait loci (QTLs) derive from Mesoamerican germplasm, leaving Andean market classes such as cranberry …