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 26 for “"Virus resistance"”.
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The evolution and genetics of virus resistance in Drosophila
… selective factor that promotes the evolution of resistance in host populations. Much of the resistance is determined by genetic factors, however, it is unclear what genetic factors promote resistance to parasites. In this thesis, I used Drosophila melanogaster as a model system to study the …
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Genetic Analysis of Soybean Mosaic Virus Resistance in Soybean
… to analyze the genetics of soybean mosaic virus (SMV) resistance in soybean [Glycine max (L.) Merr.] and to determine allelic relationships of SMV resistance genes and their interactions with SMV strain groups. In the first part of this study, the inheritance of SMV resistance in OX670 and …
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Transposable Elements and the Evolution of Virus Resistance in Drosophila melanogaster
… there is large genetic variation in pathogen resistance, and that a significant amount of genetic variation to virus resistance can be explained by major-effect polymorphisms in a small number of genes. In this thesis I will explore the role of transposable elements in the evolution of virus …
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Impatiens Necrotic Spot Virus Resistance in Transgenic Impatiens walleriana and Lycopersicon esculentum
… (N). The N gene is expected to confer INSV resistance by RNA interference or gene silencing. The presence of transgenes was confirmed by PCR. Transgenic Impatiens was selfed for two generations. Transgenic Micro-Tom was selfed for 4 generations. Spinach was used as an INSV reservoir. …
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Mapping and Characterization of Phytophthora sojae and Soybean Mosaic Virus Resistance in Soybean
… of stem and root rot, and <i>Soybean mosaic virus</i> (SMV) cause two of the most highly destructive diseases of soybean (<i>Glycine max</i> L. Merr). <i>P. sojae</i> can be managed either through deployment of race-specific resistance or through quantitative resistance termed partial …
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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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High-Resolution Mapping of the Region around the Soybean Virus Resistance Genes, Rsv1 and Rpv1
Soybean mosaic virus (SMV) and peanut mottle virus (PMV) are potyviruses that can cause serious yield reductions in soybean [Glycine max (L.) Merr.]. Virus resistant soybean cultivars have been released with alleles at the Rsv1 and Rpv1 locus that confer resistance to SMV and PMV, respectively. A …
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Construction and analysis of the pangenome of Cucurbita moschata to uncover variants associated with virus resistance
… crop that is severely affected by several potyviruses, including Moroccan watermelon mosaic virus (MWMV), zucchini yellow mosaic virus (ZYMV), and papaya ringspot virus (PRSV). The development of molecular markers linked to virus resistance can greatly assist breeding programs through …
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Genome-wide association study of Barley Yellow Dwarf Virus resistance in a Nested Association Mapping population of winter wheat using Skim Exome Capture and Practical Haplotype Graph imputation
Barley Yellow Dwarf Virus (BYDV) is a major constraint to wheat (Triticum aestivum L.) production, causing severe yield losses due to stunted growth, chlorosis, and reduced kernel weight. While chemical and cultural control strategies offer limited effectiveness, genetic resistance remains the most …
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An Exploration of Roy's adaptation model and the process of adapting to life with HIV: a grounded theory study.
… HIV experience in light of new treatments and virus resistance. Glaser’s grounded theory method was chosen to gain a perspective on the whole process of adaptation and to develop a model reflecting this, useful to nurses and other professionals. The research was guided by the philosophical …
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Regeneration and Transformation of Impatiens walleriana Using Cotyledonary Node Culture
… is susceptible to Impatiens Necrotic Spot Virus (INSV). A lack of resistant cultivars leaves growers with the sole option of destroying infected plants before INSV spreads throughout their entire crop. Therefore, the introduction of INSV resistant cultivars would have the potential to save …
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Grapevine Fanleaf Virus: Biology, Biotechnology And Resistance
Grapevine fanleaf virus (GFLV) causes fanleaf degeneration of grapevines. GFLV is present in most grape growing regions and has a bipartite RNA genome. The three goals of this research were to (1) advance our understanding of GFLV biology through studies on its satellite RNA, (2) engineer GFLV into …
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The use of maize streak virus (MSV) replication-associated protein mutants in the development of MSV-resistant plants
Maize streak virus (MSV) is the type member of the Mastrevirus genus of the Geminiviridae. As the causal agent of maize streak disease (MSD), MSV is the most significant pathogen of maize in Africa, resulting in crop yield losses of up to 100%. Transmitted by leafhoppers (Cicadulina spp.), MSV is …
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The use of maize streak virus (MSV) replication-associated protein mutants in the development of MSV-resistant plants
Maize streak virus (MSV) is the type member of the Mastrevirus genus of the Geminiviridae. As the causal agent of maize streak disease (MSD), MSV is the most significant pathogen of maize in Africa, resulting in crop yield losses of up to 100%. Transmitted by leafhoppers (Cicadulina spp.), MSV is …
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Virus-host interactions in the cassava brown streak disease pathosystem
The research seeks to understand the virus-host plant interactions for cassava brown streak disease (CBSD) caused by two viruses, Cassava brown streak virus (CBSV) and Ugandan Cassava brown streak virus (UCBSV) of the genus Ipomovirus, family Potyviridae. The diversity of six CBSD isolates from the …
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The development of transgenic plants resistant to cucumber mosaic virus and tobacco necrosis virus
Cucumber mosaic virus (CMV) and tobacco necrosis virus (TN V) often occur in mixed virus infections in South Africa. Both viruses are of economic importance because of their world-wide distribution, extensive host range and their effects on yields of agriculturally important crop plants. The …
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Comparative Functional Genomics Characterization of Low Phytic Acid Soybeans and Virus Resistant Soybeans
… seed phytic acid content and Soybean mosaic virus resistance. At normal levels, seed phytic acid content inhibits mineral absorption in humans and livestock, acting as an antinutrient and contributing to phosphorus pollution; however, the development of low phytic acid soybeans has helped …
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Design, Chemical Synthesis and Biological Evaluation of Potential New Antiviral Agents
… a disease caused by the Human Immunodeficiency Virus (HIV). Since its discovery in 1981, more than 25 million people died due to this disease. To date, an effective HIV-1 vaccine usable in prophylaxis or in the therapy of humans has not yet been identified. The failures and limited success of …
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Viral diversity and host-virus interactions in the model crenarchaeon Sulfolobus islandicus
Viruses are pervasive evolutionary forces and key players shaping natural populations. Our understanding of viral impact on host physiology however, is based on a few model systems that represent a small fraction of the life-history strategies employed by hosts or viruses across the three domains …
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Molecular genetic analysis of host resistance to soybean mosaic virus
Soybean mosaic virus (SMV), a potyvirus detected worldwide, can cause serious diseases in soybean (Glycine max L. Merr.). Host resistance to SMV conferred by a single dominant gene, Rsvl, was studied as a model to gain insights of plant virus resistance genes, and to facilitate the breeding of …
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