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 58 for “"Crop improvement"”.
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A physiological basis to crop improvement and agronomic development
… and δ¹³C) in an agronomic perspective in alley cropping systems associated with adjacent N₂ fixing trees, in terms of hydraulic redistribution, N availability and crop yields. In this thesis, the proxy-based approach to crop selection was defined as a surrogate-based (proxy and surrogate used …
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Using a barley Nested Association Mapping (NAM) Population to mine wild barley germplasm for crop improvement
… syndrome”, by which early farmers subjected the crop to a consistent selection that led to gradual changes in its characteristics and architecture. The result is that the modern cultivar differs from the wild progenitor for several advantageous traits, such as enhanced crop yield and reduced …
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The history and development of the Virginia Seed Service, Inc. into the Southern States Cooperative, Inc.
… beginning in an older organization, the Virginia Crop Improvement Association. This later association was developed to stimulate the more widespread use of improved seed for field crops.
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Developing molecular genetic tools for gene discovery in soybean (Glycine max)
… max (L.) Merr.) is one of the most valuable crops grown worldwide for seed protein and oil production and can fix atmospheric nitrogen. The completed genome sequence and the availability of transcriptomics and proteomics data for genomic and physiological studies have made soybean a feasible …
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Design of a microscopy-based screening method for stomatal development genes in <i>arabidopsis thaliana</i>
… of stomatal behavior offers opportunity for crop improvement; stomata are also useful for research into cell patterning, differentiation, and development. The purpose of this project was to create a reverse genetics, microscopy-based screening method to identify Arabidopsis genes important in …
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Analysis of organ-specific gene expression in soybean
… the expression of foreign genes in plants. For crop improvement by genetic engineering it is critical to introduce genes in specific organs that can be expressed at an appropriate developmental stage. This study involved the analysis of organ-specific control conferred by 5$\sp\prime$ and …
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Assessment of farmer preferences, constraints and angro-morphological variation among Bambara groundnut (Vigna subterranea (L.) Verdc.) accessions as a basis for seed yield selection index
… is an orphan, underutilised and less exploited crop in Africa and beyond, Yet, it is an essential traditional crop for the majority of local farmers. The first step in preparing such local germplasm for possible pre-breeding is to undertake a needs assessment study to find out what farmers have …
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Evaluation of phenotyping methods for maize
… development of improved varieties of corn. These improvements typical consist of increased yield, but also increased resistance to biotic and abiotic stresses is paramount. The speed of this crop improvement is currently limited by rather archaic methods of phenotyping, often consisting of manual …
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Interactive effects of elevated carbon dioxide concentration with nutrient availability and leaf development on plant carbon metabolism
… respiratory CO2 release influence plant growth, crop yields, and the ability of terrestrial ecosystems to offset ~2-3 Gt CO2 yr -1 of anthropogenic emissions. Rising atmospheric CO2 concentration ([CO2]) this century will impact plant photosynthesis and respiration with consequences for plant …
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The role of guard cell chloroplasts in stomatal function and coordinating stomatal and mesophyll responses .
… CO2 demands with stomatal behaviour towards crop improvement. The results presented have shown guard cells plays a role in stomatal function even though the degree of responsiveness is slower than when the mesophyll is present. Furthermore, the molecular approach demonstrated using …
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Promoter analysis in transgenic sugar beet
Crop improvement by gene manipulation will often require subtle regulation of expression of foreign genes in the transgenic plants. A strategy has been defined for production of high sucrose yield ! high juice purity / low environmental impact varieties of sugar beet. This requires modification of …
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The responses of Arabidopsis lyrata ssp. petraea to environmental stimuli
… responses to cold temperatures may facilitate crop improvement through GM technologies.
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Spinel: a framework for counting wheat spikes and kernels using UAV and ground-based imaging in breeding fields
… and select superior breeding lines to improve crop productivity. Traditional methods for assessing these traits are labour-intensive, error-prone, and manual. Despite the widespread use of deep learning (DL) techniques in recent studies, there remains a gap in applying these methods to provide …
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Preliminary quantitative trait loci analysis for biomass traits in Miscanthus sinensis
… widely studied M. x giganteus clone precludes crop improvement via traditional breeding methods. An alternative strategy to introduce genetic variability and advance performance is through the breeding of M. sinensis, one of the progenitor species of M. x giganteus. The obligatory outcrossing …
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A forward genetic screen to identify factors that control meiotic recombination in Arabidopsis thaliana
… that influence important agronomic traits in crop plants. Therefore, harnessing meiotic recombination has the potential to accelerate crop improvement via classical breeding. Numerous genes involved in crossover formation have been identified in model systems. For example, SPO11 mediates …
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Analysis of AtNHX1-expressing transgenic cotton under high salt conditions and in the field
… and salinity are two major limiting factors in crop productivity. To improve the salt tolerance in crops, one approach is to increase the solute concentration in the vacuoles of plant cells by sequestering sodium ion (Na+) into the vacuoles of plant cells. Consequently, it would reduce the …
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Examining the Receptivity of Foreign Guests: A Study of Economic Community of West African States (Ecowas) Students in Higher Educational Institutions in Accra, Ghana
… of human capital is the West Africa Centre for Crop Improvement (WACCI) based at the University of Ghana, Legon, which since its inception in 2007, has trained fifty-two multinational postgraduates who are working toward lessening food insecurity in the sub-region.</p>
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The role of Arabidopsis thaliana heterochromatin component H2A.W in meiotic recombination
… the introgression of alleles from wild crop relatives to elite cultivars. However, crossover distributions are non-random and with recombination preferentially enriched in distal regions of the chromosomes, and low numbers of crossovers in the interstitial and centromere-proximal …
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Integrative Genomic Approaches for Plant Trait Discovery, Fungal Pathogen Identification and Taxonomy
Genomics underpins crop improvement and plant health surveillance, yet its application remains constrained by incomplete detection of complex genetic variation, difficulty recovering pathogen genomes directly from diseased tissues, and inconsistent reference resources for fungal and oomycete …
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