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 34 for “"genetic resistance"”.
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Intrinsic genetic resistance of lymphocytes to influenza virus infection
… specific aim was to determine if such resistance was evident in HLA-B homozygous subjects as well while studying the feasibility of different methods to identify the site of block to replication. Flow cytometry and Western Blot failed due to the interference of input virus. RtPCR and …
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Genetic resistance to and diversity of soybean mosaic virus
… Williams to determine the number of genes for resistance. The four cultivars were also crossed with lines with known genes for resistance to SMV to test for allelism. The crosses were evaluated in the F$\sb2$ and with F$\sb{2:3}$ families in the field and in the greenhouse for reaction to …
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Genetic Resistance to the Downy Mildew Pathogen and Breeding towards Durable Disease Management in Spinach
… this study was designed to explore the genetic components 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 …
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Strains of Soybean Mosaic Virus: Aphid Transmission, Host Passage Effects, and Use in Evaluation of Genetic Resistance in Soybeans
Seven soybean mosaic virus (SMV) strains proved to be aphid transmissible, however, one isolate of strain G5 lost its aphid transmissibility after about 30 successive passages by sap inoculation through a susceptible soybean cultivar Rampage during 20 months. The aphid nontransmissible strain G5 …
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Response of Soybean Iron and Manganese Deficiency
… yield losses associated with these deficiencies, genetic resistance is more reliable and effective. Identification of resistant cultivars requires an understanding of the genetic inheritance for resistance, knowledge of the physiological mechanisms involved with resistance, and the development of …
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Sources and Inheritance of Resistance to Anthracnose Stalk Rot of Corn
… stalk rot to cause yield losses. Host genetic resistance has been successfully used to reduce loss due to Diplodia and Gibberella stalk rots of corn, but this resistance does not appear to be effective in controlling anthracnose stalk rot. Knowledge about available sources of resistance …
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Inheritance of Resistance to Tomato Spotted Wilt Virus in Lettuce (Lactuca Sativa L.)
… this disease has made it difficult to control. Genetic resistance might work, but there have been no reports of resistance in lettuce. Hartmann (personal communication) undertook a preliminary screening program for TSWV resistance and found six lines of lettuce 'Tinto', PI 167128, PI 342510, PI …
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Genomic signatures of recent selection at HIV host susceptibility genes in a Central African human population
… previous local outbreaks may have selected for genetic resistance to immunodeficiency viruses. To test this hypothesis, I examined the genomes of Biaka Western pygmies, who historically have resided in forests within the range of the only chimpanzee subspecies (Pan troglodytes troglodytes) that …
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QTL mapping of Phytophthora root rot resistance and aphid resistance in soybean
… independent projects were performed to identify genetic resistance against PRR, caused by Phytophthora sojae; to identify genetic resistance against soybean aphid, Aphis glycines Matsumura; and to develop breeder-friendly simple sequence repeat (SSR) and single nucleotide polymorphism (SNP) …
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Bacterial profiles and ex vivo effects of Salmonella Heidelberg on leukocyte function in turkey purebred lines
… increased attention, is selection to improve genetic resistance. This study evaluated the effects of an oral Salmonella Heidelberg (SH) challenge on bacterial colonization, and the ex vivo effects of SH on phagocytic and bactericidal leukocyte function in turkeys from six pedigree lines (A-F). …
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Genetic Engineering of 2,4-D Resistance in Wine Grapes
… where it is used. Since grapes have no known genetic resistance to this herbicide, breeding to incorporate resistance in commercial cultivars cannot be done. Thus genetic engineering has to be employed to produce adaptable grape cultivars. The overall objective of this study was to incorporate …
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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
… control strategies offer limited effectiveness, genetic resistance remains the most sustainable approach. In this study, a genome-wide association study (GWAS) was conducted to identify loci associated with BYDV resistance in a Nested Association Mapping (NAM) population of winter wheat derived …
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Exploiting Caenorhabditis elegans as a Discovery Platform to Identify Nematode Parasiticides that Act Through Neuromuscular Disruption
… for human development. The emergence of genetic resistance and warranted restriction on the use of toxic parasiticides beckon the development of a new generation of effective compounds to combat nematode parasites. Most nematode parasiticides developed to date act through neuromuscular …
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Evaluation of resistance in Glycine max to Fusarium virguliforme and in perennial Glycine species to Phakopsora pachyrhizi and Heterodera glycines
… problems. Soybean cultivars have a narrow genetic base due to bottlenecks in modern cultivar development. Lack of partially resistant cultivars, in the case of sudden death syndrome, and lack of durable genetic resistance to organisms that have high genetic variability, in the case of …
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Mechanisms of IFN-gamma-mediated Resistance against Development of Toxoplasmic Encephalitis
… in BALB/c mice. This strain of mouse is genetically resistant to T. gondii infection and establishes a latent chronic infection as do immunocompetent humans, and therefore provides an excellet model for this purpose. Our laboratory previously demonstrated that both T cells and …
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Molecular Basis of Pathogenesis and Host Determination in Cercospora sojina: from Phenotypic to Genotypic Patterns
… disease of soybean in many production regions. Genetic resistance is potentially one of the most cost-effective and sustainable strategies to control FLS. However, C. sojina has already demonstrated the ability to overcome resistance conveyed by single R-genes (resistance genes) of soybeans, …
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Novel Approaches for Anthelmintic and Nematicide Discovery
… nematode infections. The development of genetic resistance to anthelmintics and the phase-out of effective nematicides due to environmental toxicity and human safety concerns necessitates the discovery of new chemical controls for parasitic nematodes with novel targets and …
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A genetic study of resistance to kernel infection by Aspergillus flavus in maize (Zea mays L.)
… flavus is a chronic problem in the southern USA. Genetic resistance to A. flavus is needed to solve this problem. To ascertain and understand the inheritance of resistance to field kernel infection by A. flavus, a five-parent diallel analysis and a half-sib family analysis of 35 maize crosses were …
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Investigations Into the Genetic Basis of Resistance to Brown Stem Rot in Soybean
… examine the inheritance of brown stem rot (BSR) resistance in soybean [Glycine max (L.) Merr.], caused by a soil-borne fungal pathogen Phialophora gregata f. sp. sojae. Three known BSR resistance genes or quantitative trait loci (QTL) have all been mapped together on linkage group (LG) J. …
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