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 31 for “"wild relatives"”.
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A comprehensive microbiome analysis of wheat and its wild relatives
… understand the core community of microbes in wild wheat relatives and how they differ from the microbiome of cultivated wheat. This study compares the bacterial and fungal taxa found in and on the leaves, roots, and rhizosphere of three accessions of hard winter wheat and 14 accessions of …
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Understanding Plant Pathosystems in Wild Relatives of Cultivated Crop Plants
… are vulnerable to diverse pathogen populations. Wild relatives of crop plants are a reservoir for new disease resistance traits that can be introgressed into cultivated crops. The identification of novel disease resistance is of paramount importance because pathogen co-evolution is not only …
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Comparative analyses identify adaptive genetic variation in crops and crop wild relatives
… variants in the genomes of crops and crop wild relatives. These approaches have the potential to identify genetic variants that are under selection and thus potentially contributing to local adaptation. As a background to the dissertation, I present in Chapter 1 the state of research in …
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An ex ante economic impact analysis of developing low cost technologies for pyramiding useful genes from wild relatives into elite progenitors of cassava
… technologies for pyramiding useful genes from wild relatives into elite progenitors of cassava in Nigeria, Ghana and Uganda. More specifically, it estimates the change in economic surplus generated by introducing cassava varieties with tolerance to cassava mosaic disease, green mites, …
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The evolutionary history and impact of polyploidy in mustard crops and their relatives
… gene duplications in mustard crop species, their wild relatives within tribe Brassiceae remain largely unstudied. A combination of ionomics, metabolomics, and comparative genomics is applied in Chapter 3 to investigate salt and heavy metal stress responses in the mustard crop wild relative Cakile …
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Transcriptomic study of evolution and gene expression in diploid and allotetraploid glycine subgenus glycine
… studied. Unlike soybean, the perennial wild relatives in subgenus Glycine are less well known even though they possess both an interesting evolutionary history of speciation and polyploidization, and a possible potential as a source of diversity to expand the current soybean gene pool. …
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Crop traits to improve plant water relations under abiotic stresses
… responses of domesticated tomatoes and their wild relatives to identify traits that could enhance salt tolerance in commercial tomato varieties. Chapter 3 aims to understand the physiological and molecular mechanisms of salt tolerance in tomato introgression lines derived from wild relatives …
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Grapevine Fanleaf Virus: Biology, Biotechnology And Resistance
… are resistant. This author used tobacco, its wild relatives, and hybrids between tobacco and wild relatives to evaluate the genomic and physiological basis of resistance. Resistance to GFLV in tobacco is governed by systemic recovery from virus infection that is additively inherited and likely …
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Chloroplast Biotechnology in Higher Plants: Expressing Antimicrobial Genes in the Plastid Genome
… possibility for transmission of novel genes to wild relatives has hampered acceptance of GM crops in some markets. Chloroplast transformation presents an attractive alternative to nuclear transformation and offers the potential to ameliorate these environmental concerns. Most agronomically …
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Genetic diversity studies of Trifolium species from the extremes of the UK
Crop wild relatives have been identified as ecologically and economically important plant genetic resources but are often a neglected resource. The recognition of the need for their specific conservation and their value for future use has been strengthened by the Convention on Biological Diversity …
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The impact of heterogeneity in stomatal anatomical characters on stomatal function and physiology in wheat
… elite MAGIC wheat cultivars (EW) and wheat wild relatives (WWR), and the affect these changes had on stomatal kinetics. Results propose that WWR may be better-able to deal with elevated temperatures and dynamic light environments due to faster stomatal kinetics and higher gs facilitating …
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Phenotypic characterization of the Peach (Prunus spp.) collection at the National Clonal Germplasm Repository in Davis, California
… consist of cultivars, breeder's selections, and wild relatives, held at the National Clonal Germplasm Repository in Davis, CA. The recent repropagation of these accessions provided a unique opportunity to establish baseline data on a large set of uniformly aged trees. The growth habit of all …
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Evaluation of resistance in Glycine max to Fusarium virguliforme and in perennial Glycine species to Phakopsora pachyrhizi and Heterodera glycines
… nature of resistance in soybean and its wild relatives, and their relationship.
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Genetic mapping of agronomic traits from the interspecific cross of Oryza sativa (L.) and Oryza glaberrima (Steud.)
Wild relatives of cultivated rice varieties offer new genetic sources for enhancing economic value, but traditional interval mapping techniques have not gained widespread support among applied researchers for marker assisted selection. The objectives of this study were to detect quantitative trait …
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Evaluation of fertile lines derived from the hybridization of Glycine max and G. tomentella
Hybridization with wild relatives of crops has been an important tool for incorporating traits such as disease resistance into many crops, but has not been utilized in soybean (Glycine max), besides a few examples involving its ancestor, G. soja. G. tomentella (2n=78) is a wild, perennial relative …
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Integrating bioinformatic approaches to promote crop resilience
… efforts to bolster crop plant resilience using wild relatives have been hindered by time consuming efforts to develop genomic tools and/or identify the genetic basis for agronomic traits. Thus, increasing crop plant resilience requires developing and deploying approaches that leverage current …
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Unlocking the genetic diversity of the undomesticated rice relative Oryza longistaminata
Rice (Oryza sativa) is a crucial part of the global food supply. Meeting projected increases in demand, which are rising fastest in sub-Saharan Africa, while using resources efficiently and adapting to a changing climate will require new sources of variation for trait improvement. The genetically …
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Exploitation of morphometric, biochemical and genetic traits of traditional vegetable for providing novel foods [Valutazione dei tratti morfometrici, biochimici e genetici di ortive tradizionali per la produzione di novel foods]
… delle specie spontanee parentali (Crop Wild Relatives - CWRs) appartenenti alla famiglia delle Brassicaceae, che svolgono un ruolo importante nel miglioramento genetico delle colture afferenti a Brassica oleracea L. (cavolo broccolo, cavolfiore, cavolo da foglia, cavolo cappuccio, etc.). …
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