Browsing Doctoral Degrees (Genetics) by Title
Now showing items 8-27 of 59
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Elucidating functional interactions between the Russian wheat aphid (D. noxia Kurjumov) and bread wheat (Triticum aestivum L.)
(Stellenbosch : Stellenbosch University, 2014-12)ENGLISH ABSTRACT: The Russian wheat aphid (Diuraphis noxia, Kurdj., Hemipetra, Aphididae, RWA) is an important pest of wheat, causing large-scale damage and yield losses. Various studies have been done at a transcriptomics ... -
The evolutionary history of the genus Seriola and the phylogeography and genetic diversity of S. lalandi (yellowtail) across its distribution range
(Stellenbosch : Stellenbosch University, 2014-04)ENGLISH ABSTRACT: The genus Seriola includes several important commercial fish species, yet the phylogenetic relationships between species have not been fully investigated to date. This study reports the first molecular ... -
Functional characterization of a putative signalling peptide TAXIMIN in the model plant Arabidopsis thaliana and a medicinal plant Sutherlandia frutescens L. R. Br.
(Stellenbosch : Stellenbosch University, 2016-03)ENGLISH ABSTRACT: Secondary metabolite production in plants assists with protection against predators and attraction of pollinators. Manipulation of secondary metabolite pathways towards increased production of compounds ... -
Functional roles of raffinose family oligosaccharides: Arabidopsis case studies in seed physiology, biotic stress and novel carbohydrate engineering
(Stellenbosch : Stellenbosch University, 2015-12)ENGLISH ABSTRACT: The raffinose family of oligosaccharides (RFOs) are α1,6-galactosyl extensions of sucrose (Suc-Galn) unique to the plant kingdom. Their biosynthesis is mediated via α1,6-galactosyltransferases which ... -
Gene discovery and expression analysis in sugarcane leaf and culm
(Stellenbosch : Stellenbosch University, 2002-12)ENGLISH ABSTRACT: Sugarcane (Saccharum spp. hybrids) is a commercial crop plant capable of storing up to 20% sucrose on a fresh mass basis in the culm. Knowledge about gene expression during sugarcane growth and maturation ... -
A genetic analysis of the occurrence of pulmonary haemorrhage in racing thoroughbreds in Southern Africa
(Stellenbosch : Stellenbosch University, 2004-12)ENGLISH ABSTRACT: This study was carried out to investigate whether environmental and/or genetic factors had an effect on the incidence of epistaxis related to exercise-induced pulmonary haemorrhage among racehorses in ... -
Genetic enhancement of pearl millet
(Stellenbosch : Stellenbosch University, 2004-03)ENGLISH ABSTRACT: The aim of this study was toe stablish a reliable protocol for the production 0 f transgenic pearl millet as this will open new avenues for augmenting the gene pool of this crop. This was achieved by ... -
Genetic improvement of growth rate in rainbow trout (Oncorhynchus mykiss)
(Stellenbosch : University of Stellenbosch, 2004-12)ENGLISH ABSTRACT: A breeding programme aimed at the genetic improvement of growth rate of rainbow trout was initiated in 1988 by the Department of Genetics, University of Stellenbosch, in collaboration with the local ... -
Genetic manipulation of sucrose-storing tissue to produce alternative products
(Stellenbosch : University of Stellenbosch, 2007-03)The main aim of the work presented in this dissertation was to explore the possibility to genetically manipulate the sucrose storing crops, sugarcane and sweet sorghum, to convert their sucrose reserves into higher-value ... -
Genetic manipulation of the cell wall composition of sugarcane
(Stellenbosch : University of Stellenbosch, 2007-03)In order to understand and manipulate carbon flux to sucrose one needs to consider not only its biosynthetic pathways, but also the competing sinks for carbon in various parts of the plant and at different stages of ... -
Genetic mapping of adult plant stripe rust resistance in the wheat cultivar Kariega
(Stellenbosch : Stellenbosch University, 2003-04)ENGLISH ABSTRACT: Stripe (yellow) rust of wheat, caused by Puccinia striiformis f.sp. tritici, was first detected as a single introduction into South Africa in 1996. Two additional pathotypes have since been identified. ... -
Genetic mapping of gray leaf spot resistance genes in maize
(Stellenbosch : Stellenbosch University, 2000-12)ENGLISH ABSTRACT: Gray leaf spot (GLS) of maize, caused by the fungus Cercospora zeae-maydis, can reduce grain yields by up to 60% and it is now recognized as one of the most significant yield-limiting diseases of maize ... -
Genome and transcriptome sequencing of vitis vinifera cv pinotage
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH ABSTRACT: Examining the genetic basis of natural phenotypic variation, and the transfer of this knowledge to a breeding program for improved crop cultivars or livestock races, is a major goal for biological ... -
Growth-related gene expression in haliotis midae
(Stellenbosch : University of Stellenbosch, 2010-12)ENGLISH ABSTRACT: The slow growth rate of Haliotis midae impedes the optimal commercial production of this most profitable South African aquaculture species. To date, no comprehensive effort has been made to identify ... -
Identification and characterisation of grapevine leafroll-associated virus 3 genomic and subgenomic RNAs
(Stellenbosch : University of Stellenbosch, 2010-12)ENGLISH ABSTRACT: Grapevine leafroll-associated virus 3 (GLRaV-3) is the type strain for the genus Ampelovirus, family Closteroviridae. There has been only one report that claimed the complete nucleotide sequence of ... -
Identification and molecular characterization of three genetic variants of Grapevine leafroll-associated virus 3 (GLRaV-3) from South African vineyards and their spread in local vineyards
(Stellenbosch : University of Stellenbosch, 2011-03)ENGLISH ABSTRACT: Grapevine diseases, in particular virus and virus-like diseases, are threatening grapevine industries worldwide; also in South Africa. Grapevine leafroll (GLR) is one of the most important diseases of ... -
Identification of growth related quantitative Trait Loci within the abalone using comparative microsatellite bulked segregant analysis
(Stellenbosch : Stellenbosch University, 2010-12)ENGLISH ABSTRACT: The South African abalone, Haliotis midae, is a commercially valuable mollusc and is mostly exported to the Far East. Genetics research on H. midae has increased substantially since a genetic improvement ... -
Identification of SNPs associated with robustness and greater reproductive success in the South African merino sheep using SNP chip technology
(Stellenbosch : Stellenbosch University, 2015-04)ENGLISH ABSTRACT: Reproduction and robustness traits are integral in ensuring sustainable, efficient and profitable sheep farming. Increases in genetic gain of reproduction and robustness traits are however, hampered by ... -
In silico and functional analyses of the iron metabolism pathway
(Stellenbosch : Stellenbosch University, 2013-03)ENGLISH ABSTRACT: Iron is an essential micronutrient that is an absolute requirement for correct cellular function in all eukaryotic organisms. However, ferrous iron has the ability to catalyze the formation of potentially ... -
Increasing cellulosic biomass in sugarcane
(Stellenbosch : Stellenbosch University, 2014-04)ENGLISH ABSTRACT: Increased demand of petroleum, declining fossil fuel reserves, geopolitical instability and the environmentally detrimental effects of fossil fuels have stimulated research to search for alternative sources ...
