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Theses and Dissertations (Genetics): Recent submissions
Now showing items 61-80 of 198
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(University of Pretoria, 2014)Advances in next generation sequencing technologies have enabled researchers to do in depth genome studies. The steadily decreasing cost of sequencing has made it possible to conduct a Genotyping-by-Sequencing (GBS) approach ...
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(University of Pretoria, 2013)In most breeding programmes breeders use phenotypic data obtained in breeding trials to rank the performance of the parents or progeny on pre-selected performance criteria. Through this ranking the best candidates are ...
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(University of Pretoria, 2013)The avocado (Persea americana Mill.) is a popular fruit crop eaten throughout the world. It has a number of health benefits and uses and is a good source of fibre, potassium, Vitamin C, K and B6, folate, and antioxidants. ...
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(University of Pretoria, 2013)The objective of this study was to characterize the mitochondrial genomes of the species within the genus Ceratocystis and investigate the evolutionary process of the ribosomal RNA cistron found within these fungi. ...
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Taxonomy, mating type distribution and population biology in species of Leptographium and Grosmannia (University of Pretoria, 2013)Species in the ascomycete genus Leptographium sensu lato (Ophiostomatales) are specifically adapted to be vectored by primarily conifer‐infesting bark beetles (Coleoptera, Scolytinae). Most species in the genus are ...
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(University of Pretoria, 2013)Ceratocystis is a genus of Ascomycete fungi residing in the family Ceratocystidaceae (Order: Microascales; Class: Sordariomycetes). Species of Ceratocystis are best-known as woundinfecting fungi, which are mostly carried ...
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(University of Pretoria, 2013)No abstract available
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(University of Pretoria, 2012-12-14)Endophytic fungi of most woody trees are poorly studied due to their cryptic existence, the complexity of the community and the poor ability of traditional tools to characterize them. This study characterised the endophytic ...
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(2012-12-14)Previous studies have claimed that the Afrikaner population of South Africa contains approximately 7% non-European DNA. It is thus ironic that Afrikaners practiced racial separation and discrimination against non-Europeans, ...
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(University of Pretoria, 2012-12-14)Endophytes are organisms that inhabit plant organs and colonise plant tissues without causing obvious signs of disease. Much research has been done to elucidate the effects that endophytes have on their hosts, but the ...
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(University of Pretoria, 2012-12-14)Pines represent over 50% of the trees planted by forestry companies in South Africa. They are valued not only for their oils and biofuels, but for their solid timber, pulp and paper. Diseases pose a threat to pine trees. ...
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(University of Pretoria, 2009)Conventional breeding technologies, which are being used for the domestication of tree species, struggle to meet the current demand for wood products such as paper, pulp and timber. Future targets of developing cellulosic ...
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(University of Pretoria, 2011-10-27)The marine environment is vast and is one of the last natural habitats that provides’ a major source of protein through fisheries. This has led to a massive overexploitation of this resource because in the past marine fish ...
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(University of Pretoria, 2011)Genetic engineering of superior wood properties and exploiting natural genetic variation found within commercially important trees, such as Eucalyptus spp., promise to increase cellulose biomass production. It is therefore ...
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(University of Pretoria, 2010)Sirex noctilio is a major pest to Pinus spp. and threat to the Forestry industry in the Southern Hemisphere. The varying level of efficacy of its primary biological control agent, Deladenus siricidicola, is also of serious ...
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(University of Pretoria, 2012-09-14)The Gibberella fujikuroi species complex accommodates Fusarium spp. in the section Liseola that are unified by a common Gibberella sexual state. These are ubiquitous and economically important pathogens of plants, resulting ...
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(University of Pretoria, 2012-09-14)Due to the poor stability and immunogenicity of small antigenic peptides, it is necessary that they be presented to the immune system in conjugation with larger carrier proteins or on the surface of chimeric viral or ...
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(University of Pretoria, 2010-10-09)Fecundity determines the magnitude and direction of evolutionary change. By analyzing traits correlating to human fecundity we may understand our own evolutionary roots, and the behaviour and choices that define modern ...
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(University of Pretoria, 2010-09-09)Many of the elephant populations in South Africa consist of small reintroduced populations in conservation areas smaller than 1000 km2. In this dissertation I have analysed demographic and genetic factors which may affect ...
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(University of Pretoria, 2012-08-14)Ceratocystis fimbriata is the type species for the genus Ceratocystis and was first described as the causal agent of black rot in sweet potatoes. However, evidence from DNA sequence data suggests that C. fimbriata is in ...
Now showing items 61-80 of 198