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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 17 of 17 for “"aphid resistance"”.
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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
<p>Soybean aphid (Aphis glycines Matsumura) has been a major pest of soybean [Glycine max (L.) Merr.] in North America particularly in the northern United States and three Canadian provinces. At least four biotypes of soybean aphid have been confirmed in the United States. Identification of soybean …
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Genetic improvement of aphid resistance, protein, and elemental composition in soybean
Yield Drag Associated with the Aphid Resistance Gene Rag2 from PI 200538 The soybean aphid (Aphis glycines Matsumura) is an important pest of soybean [Glycine max (L.) Merr.] that was first identified in North American during 2000. The pest can be controlled by the resistance genes Rag1 and Rag2, …
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QTL mapping of Phytophthora root rot resistance and aphid resistance in soybean
… (PRR), sudden death syndromes (SDS) and soybean aphids are threatening soybean production and plant health. Three independent projects were performed to identify genetic resistance against PRR, caused by Phytophthora sojae; to identify genetic resistance against soybean aphid, Aphis glycines …
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Molecular Approaches to Facilitate Marker-Assisted Selection for Soybean Aphid Resistance in Soybean
… was done because sometimes the introgression of resistance genes from nonadapted sources can carry undesirable genes through genetic linkages. To test for associated effects, field evaluations of two backcross populations segregating for Rag1 were conducted in multiple environments with no …
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Evaluation of soybean aphid resistance, yield qtl confirmation, and genetic gain in soybean
Soybean Aphid Resistance in Exotic Soybean Lines The soybean aphid, Aphis glycines Matsumura (Hemiptera: Aphididae), is a common insect pest of soybean [Glycine max (L.) Merr] in China and is also found frequently in other Asian countries. It was identified in the US in 2000 and has since spread …
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Virus-induced gene silencing and molecular marker mapping for Russian wheat aphid resistance in wheat
To view the abstract, please see the full text of the document.
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Soybean Resistance and Defense Responses Against Aphis Glycines
The soybean aphid, Aphis glycines Matsumara, has become an important pest of soybean [Glycine max (L.) Merrill] in North American since 2000. Host plant resistance is an economical way to control aphids. Soybean resistance against A. glycines was studied by (i) characterizing the antibiosis type of …
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Genetic analysis of resistance to Myzus persicae (Sulzer) in Nicotiana tabacum L.
Field experiments with the green peach aphid on tobacco were conducted at Blackstone, Virginia in 1983 and 1984. The objectives were to: 1) confirm and identify source materials resistant to the green peach aphid; 2) study the inheritance of aphid resistance; 3) verify heritability of resistant …
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Characterizing soybean rust resistance within populations of Glycine tomentella and the inheritance and characterization of soybean aphid resistance in PI 587663, PI 587677, PI 587685, and PI 594592
… to the fungus and even though sources of resistance have been discovered within the USDA soybean germplasm bank, isolates of soybean rust can overcome that resistance, so other sources of rust resistance are needed to combat rust. The wild perennial Glycine species may contain unique rust …
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Mechanism of vector resistance in groundnut to control groundnut rosette virus disease in Sub-Saharan Africa
… demonstrated that ICG12991 was resistant to the aphid vector of groundnut rosette diseases and that this resistance was stable over time and under high aphid pressure. Feeding experiments related slow population development and high aphid mortality on ICG 12991 to an inhibition of phloem feeding …
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Influence of Loss of Function of the Fatty Acid Desaturase 7 Gene on Photosynthetic Activity and Foliar Redox Status
… profiles of chloroplast membranes and enhance resistance against aphids. This research contributes toward the long-term goal of identifying factors that determine aphid resistance in FAD7 mutants. Previous data suggested constitutive differences between spr2 and WT including increased …
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The interactions of the cucumber mosaic virus 2b protein with the viral 1a and host Argonaute 1 proteins
… of AGO1 is too strong this de-represses resistance against aphids, the insect vectors of CMV, which will be deleterious to virus transmission. In my initial work, I helped to establish that another CMV protein, the 1a replication protein, also binds to the 2b protein and modulates the …
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Soybean aphid intra-biotype variability based on colonization of specific soybean genotypes, resistance responses of soybean genotypes to pathogen infection after the application of chemical elicitors, and resistance to charcoal rot identified in ancestral soybean germplasm
The soybean aphid, Aphis glycines Matsumura (Hemiptera; Aphididae), is one of the most destructive insect pests of soybeans (Glycine max) in the United States. One method for managing this pest is through host plant resistance. Since its arrival in 2000, four aphid biotypes have been identified …
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Interactions between Cucumber mosaic virus proteins and host proteins
… CMV is mainly transmitted between plants by aphids, insects with probing mouthparts that introduce virus particles directly into host cells. The 2b viral suppressor of RNA silencing (VSR) encoded by CMV is a potent counterdefence and pathogenicity factor that inhibits antiviral silencing by …
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Genetic diversity and fungicide sensitivity of Rhizoctonia solani associated with soybean seedling disease
… of commercial soybean varieties marketed for resistance to members of this species, seed treatment fungicides have become increasingly important as a management option. However, our knowledge of the groups associated with soybean seedlings, the genetic structure of the pathogenic groups, as …
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Studies of Resistance to Aphids and Viruses in Arabidopsis thaliana and Capsicum annuum
… In this study, methods to enhance plant resistance to CMV infection and infestation by Myzus persicae, a vector that transmits CMV, were assessed. There were two parts to the project. In the first, the feasibility of using exogenous salicylic acid (SA) application to induce resistance to …
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Virus-induced effects on aphid-host interactions in Solanaceous plants
… changes that may influence virus transmission by aphids. In Arabidopsis thaliana ecotype Col-0 and cucurbits, CMV diminishes host suitability for aphids, inhibiting prolonged feeding and encouraging migration of viruliferous aphids from infected plants to healthy plants. In tomato (Solanum …