A5023511631- Aquatic Ecosystems and Phytoplankton Dynamics
- Insect-Plant Interactions and Control
- Genetic Mapping and Diversity in Plants and Animals
- Wheat and Barley Genetics and Pathology
- Genetics and Plant Breeding
- Aquatic Ecosystems and Biodiversity
- Environmental Toxicology and Ecotoxicology
- Plant Virus Research Studies
- Insect symbiosis and bacterial influences
- Mine drainage and remediation techniques
- Insect Resistance and Genetics
- Marine and coastal ecosystems
- Plant-Microbe Interactions and Immunity
- Genetic diversity and population structure
- Plant tissue culture and regeneration
- Plant Stress Responses and Tolerance
- Plant nutrient uptake and metabolism
- Freshwater macroinvertebrate diversity and ecology
- Plant Disease Resistance and Genetics
- Agricultural pest management studies
- Soil and Water Nutrient Dynamics
- Legume Nitrogen Fixing Symbiosis
- Plant Parasitism and Resistance
- Fish Ecology and Management Studies
- Heavy metals in environment
Stellenbosch University
2016-2025
Council for Scientific and Industrial Research
2018
University of the Free State
1990-2017
University of Pretoria
2001-2010
Colorado State University
2005-2009
Forestry and Agricultural Biotechnology Institute
2003
Agricultural Biotechnology Institute
2003
Biotechnology Institute
2002
In recent decades, scarcity of available resources, population growth and the widening in consumption processed foods animal origin have made current food system unsustainable. High-income countries shifted towards patterns which is causing an increasingly process environmental degradation depletion natural with increased incidence malnutrition due to excess (obesity non-communicable disease) chronic deprivation. An urgent challenge is, therefore, move more healthy sustainable eating choices...
Abstract Sponsored by the National Science Foundation and U.S. Department of Agriculture, a wheat genome sequencing workshop was held November 10–11, 2003, in Washington, DC. It brought together 63 scientists diverse research interests institutions, including 45 from United States 18 dozen foreign countries (see list participants at http://www.ksu.edu/igrow). The objectives were to discuss status genomics, obtain feedback ongoing projects, develop strategies for genome. purpose this report...
Cyanobacteria are one of the earth's most ancient life forms. Evidence their existence on earth, derived from fossil records, encompasses a period some 3.5 billion years in late Precambrian era. dominant phytoplanton group eutrophic freshwater bodies worldwide. They have caused animal poisoning many parts world and may present risks to human health through drinking recreational activity. produce two main groups toxin namely neurotoxins peptide hepatotoxins. were first characterized...
Knowledge of genetic diversity (GD) and relationships among maize inbred lines is indispensable in a breeding program. Our objectives were to (1) investigate the level (2) assess their structures by applying simple sequence repeat (SSR) markers. Fifty-six highland mid-altitude obtained from CIMMYT programs Ethiopia Zimbabwe genotyped using 27 SSR loci. All genotypes studied could unequivocally be distinguished with combination SSRs used. In total, 104 alleles identified, mean 3.85 per locus....
Although several wheat genes differentially expressed during the Russian aphid resistance response have recently been identified, their requirement for and specific role in remain unclear. Progress wheat-aphid interaction research is hampered by inadequate collections of mutant germplasm difficulty transforming hexaploid wheat. Virus-induced gene silencing (VIGS) technology emerging as a viable reverse genetics approach cereal crops. However, potential VIGS determining defence function has...
The comparison of different methods estimating the genetic diversity could define their usefulness in plant breeding and conservation programs. In this study, a total 15 morphological traits, eight AFLP-primer combinations 20 simple sequence repeat (SSR) loci were used (i) to study among 62 selected highland maize accessions, (ii) assess level correlation between phenotypic distances, (iii) classify accessions into groups based on molecular profiles traits. analysis variance data revealed...
The transcription factor WRKY53 is expressed during biotic and abiotic stress responses in cereals, but little currently known about its regulation, structure downstream targets. We sequenced the wheat ortholog TaWRKY53 promoter region, which revealed extensive similarity gene architecture cis-acting regulatory elements to rice OsWRKY53, including presence of stress-responsive abscisic acid-responsive (ABRE) motifs GCC-boxes. Four proteins interacted with yeast one-hybrid assays, suggesting...
The Russian wheat aphid (RWA), Diuraphis noxia (Mordvilko) is one of the most destructive insect pests cereals world‐wide. Although resistant cultivars have been bred, biochemical mechanism resistance unknown. aim this work was to gain information on which could contribute more directed breeding in future. effect RWA infestation inter‐ and intracellular β‐1,3‐glucanase activities studied different ( Triticum aestivum L.) containing Dn ‐1 gene for corresponding near‐isogenic susceptible...
Abstract One of the most severe problems associated with eutrophication urban freshwater ecosystems is occurrence increasingly frequent blooms toxic cyanobacteria. Cyanotoxins might accumulate in trophic web, producing diverse intoxication symptoms and chronic effects that are difficult to diagnose prevent. High mortality domestic animals fish has been reported previously under these prevailing conditions. This study investigates taxonomic composition phytoplankton assemblages Sheldon Lake...
Diuraphis noxia (Kurdjumov)(Russian wheat aphid) has severe economic impacts on and barley production in the United States. The interaction between Russian aphid its cereal hosts is poorly understood. However, recent appearance of new biotypes States showed that specific interactions exist resistance loci biotypes. At present, Dn7 only known gene hexaploid confers against all U.S. This study was conducted to investigate molecular mechanism Dn7-mediated two (Russian 1 2). Using GeneChip Wheat...
Abstract Aphids are a speciose family of the Hemiptera compromising >5500 species. They have adapted to feed off multiple plant species and occur on every continent Earth. Although economically devastating, very few aphid genomes been sequenced assembled, those that suffer low contiguity due repeat-rich AT-rich genomes. With third-generation sequencing becoming more affordable approaching quality levels second-generation sequencing, ability produce contiguous genome assemblies is...