Department of Genetics
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Development of alternative diagnostic protocols for Candidatus Phytoplasma asteris and Coniella granati Sacc. (Syn. Pilidiella granati)
(Stellenbosch : Stellenbosch University, 2019-04)ENGLISH ABSTRACT: The Republic of South Africa (RSA) is an integral part of the global fruit exporting chain. Currently, South Africa is ranked eighth in the world in wine production, exporting 40% of all locally produced ... -
Starch trek : the search for yield
(Frontiers Media, 2019)Starch is a plant storage polyglucan that accumulates in plastids. It is composed of two polymers, amylose and amylopectin, with different structures and plays several roles in helping to determine plant yield. In leaves, ... -
Population genetics of Southern Hemisphere tope shark (Galeorhinus galeus) : Intercontinental divergence and constrained gene flow at different geographical scales
(Public Library of Science, 2017)The tope shark (Galeorhinus galeus Linnaeus, 1758) is a temperate, coastal hound shark found in the Atlantic and Indo-Pacific oceans. In this study, the population structure of Galeorhinus galeus was determined across the ... -
Modulation of the Vitis vinifera cv. ‘Chardonnay’ microRNA and mRNA transcriptomes in response to aster yellows phytoplasma-infection
(Stellenbosch : Stellenbosch University, 2019-04)ENGLISH ABSTRACT: Aster yellows (AY) phytoplasmas are part of a group of cell wall-less plant pathogenic bacteria responsible for a detrimental disease known as grapevine yellows (GY). The molecular mechanisms of AY ... -
Characterization of citrus tristeza virus variants and their influence on symptom expression in grapefruit
(Stellenbosch : Stellenbosch University, 2019-04)ENGLISH ABSTRACT: Citrus tristeza virus (CTV), a member of the family Closteroviridae, was responsible for large scale destruction of citrus, especially in the Americas, due to tristeza disease and necessitated a production ... -
A comparative study of selected physical and biochemical traits of wild-type and transgenic sorghum to reveal differences relevant to grain quality
(Frontiers Media, 2017)Transgenic sorghum featuring RNAi suppression of certain kafirins was developed recently, to address the problem of poor protein digestibility in the grain. However, it was not firmly established if other important quality ... -
Overexpression of a tomato SlNAC2 gene in Nicotiana tabacum to determine its potential role in enhancing drought tolerance in plants
(Stellenbosch : Stellenbosch University, 2018-12)ENGLISH ABSTRACT: The ability of transcription factors to regulate stress-response gene expression within a plant makes them ideal targets as transgenes for improving stress tolerance. The NAC (NAM/ATAF/CUC) transcription ... -
Initiation of a pre-breeding effort for water stress resistance traits and yield improvement in wheat
(Stellenbosch : Stellenbosch University, 2018-12)ENGLISH ABSTRACT: Wheat (Triticum aestivum L.) is an important crop produced in South Africa and across the world. Water stress and rust diseases (Puccinia spp.) are common factors hindering wheat growth and development. ... -
Analysis of aspects of the starch metabolic pathway in lower plants
(Stellenbosch : Stellenbosch University, 2018-12)ENGLISH ABSTRACT: Starch is an important plant storage polysaccharide that has been demonstrated to have a major influence on plant growth. Transitory starch is synthesized in the leaves of plants during the day as a ... -
Comparing different siRNA delivery systems to target Diuraphis noxia
(Stellenbosch : Stellenbosch University, 2018-12)ENGLISH ABSTRACT: Diuraphis noxia, also known as the Russian wheat aphid, is a major pest of wheat. Breeding for resistance against D. noxia has been relatively successful in wheat as there has been many resistance genes ... -
Initiation of a wheat pre-breeding effort aimed at yield improvement using male-sterility marker assisted recurrent selection
(Stellenbosch : Stellenbosch University, 2018-12)ENGLISH ABSTRACT: Continous decline in South Africa’s wheat production over the past few decades has lead to a corresponding rise in reliance on wheat imports to satisfy the local consumption needs. Wheat breeders need ... -
Monetary value of the impacts of filamentous green algae on commercial agriculture : results from two geographically different case studies
(South African Water Research Commission, 2016-07)This paper presents estimates of the monetary value of the impact of eutrophication (algae) on commercial agriculture in two different catchments in South Africa. A production function approach is applied to estimate the ... -
Microsatellite-based DNA fingerprinting of selected grapevine cultivars
(South African Society for Enology and Viticulture, 2018)Cultivar identification by ampelography is often difficult and is sensitive to environmental conditions, thus it can be problematic to distinguish between closely related cultivars. DNA fingerprinting offers an alternative ... -
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 ... -
Genetic and phenotypic characterisation of commercial dusky kob (Argyrosomus japonicus) cohorts
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH ABSTRACT: Dusky kob, Argyrosomus japonicus, is a large Sciaenid finfish that has been identified as an emergent aquaculture species in South Africa. Current production practices for dusky kob are based on mass ... -
Improving wheat grain yield by employing an integrated biotechnology approach
(Stellenbosch : Stellenbosch University, 2018-03)ENGLISH ABSTRACT: Wheat is a widely cultivated crop as it forms a significant part of the world’s diet, especially within developing countries. However, food insecurity is increasing at a rapid rate and to meet this ... -
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 ... -
Genome of Russian wheat aphid an economically important cereal aphid
(BioMed Central, 2017-12-28)Although the hemipterans ( Aphididae ) are comprised of roughly 50,000 extant insect species, only four have sequenced genomes that are publically available, namely ... -
Development of a hairy root bioreactor from Stevia rebaudiana to produce steviol glycosides
(Stellenbosch : Stellenbosch University, 2017-12)ENGLISH SUMMARY: Extracts from the leaves of Stevia rebaudiana, a plant native to South America, have been used as natural sweetener for centuries. With the global epidemic of obesity linked to increased prevalence of ... -
Characterisation of the glycoside hydrolase domain of a novel bi-functional metagenomic clone for use in the biofuel production industry
(Stellenbosch : Stellenbosch University, 2017-12)ENGLISH ABSTRACT: The current practice of 1st generation biofuel production is marred by several hurdles, namely concerns over food security and the moral dilemma created by using edible feedstocks as a biofuel ...
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