Browsing Doctoral Degrees (Genetics) by Title
Now showing items 15-34 of 59
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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 ... -
Investigating the role of Brettanomyces and Dekkera during winemaking
(Stellenbosch : Stellenbosch University, 2008-12)Wine quality is greatly influenced by the number of microorganisms, which occur throughout the winemaking process. These microorganisms are naturally present on the grapes and in the cellar from where they can be introduced ... -
An investigation into the genetic variation of chilling requirement in apple (Malus x domestica Borkh.) progenies
(Stellenbosch : Stellenbosch University, 2002-03)ENGLISH ABSTRACT: Various experiments were undertaken over a period of five years to investigate the feasibility of initiating a large-scale programme of controlled apple breeding and selection for the improvement of ... -
Investigation of the genetic aetiology of Parkinson's disease in South Africa
(Stellenbosch : University of Stellenbosch, 2011-03)ENGLISH ABSTRACT: Parkinson’s disease (PD), a neurodegenerative movement disorder characterized by resting tremors, bradykinesia, postural instability and rigidity, is due to a selective loss of dopaminergic neurons in ... -
The isolation and characterisation of a developmentally-regulated gene from Vitis vinifera L. berries
(Stellenbosch : University of Stellenbosch, 2004-12)ENGLISH ABSTRACT: Despite increased focus on ripening-related gene transcription in grapevine, and the large number of ripening-related cDNAs identified from grapes in recent years, the molecular basis of processes involved ... -
Isolation and characterisation of carotenoid biosynthetic genes from Vitis vinifera
(Stellenbosch : University of Stellenbosch, 2007-03)Plants are constantly exposed to adverse environmental conditions including variations in light intensity and the availability of water resources. These abiotic factors are expected to worsen as the changing global climate ... -
Isolation and characterisation of novel enzymes producing fructo- and galacto-oligosaccharides through a metagenomic approach
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH ABSTRACT: Prebiotic oligosaccharides and polymers are a form of dietary carbohydrate that are selectively fermented by the microbiota of the lower gastro intestinal tract and confer a health benefit to the host ... -
Isolation and evaluation of the sugarcane UDP-glucose dehydrogenase gene and promoter
(Stellenbosch : University of Stellenbosch, 2006-12)The young internodes of sugarcane are ideal targets for altering metabolism, through genetic manipulation, to potentially control known fungal diseases such as Smut or to increase sucrose yields in these regions that are ...
