Doctoral Degrees (Plant Sciences)
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Genetic diversity analysis of linseed (linum usitatissimum L.) in different environments
(University of the Free State, 2002-11)English: The study was carried out to assess the genetic diversity of 60 linseed accessions mainly collected from Ethiopia in different environments using morphological and amplified fragment length polymorphism (AFLP) ... -
A phylogenetic study of the South African representatives of the tribe Andropogoneae (Poaceae)
(University of the Free State, 2003-11)English: The tribe Andropogoneae makes up half of the grass subfamily Panicoideae, with approximately 85 genera and 960 species (Hartley 1958, Clayton and Renvoize 1986). The genera of the tribe are typically tropical ... -
Quality prediction and improvement in Lesotho commercial wheat (Triticum aestivum L.) cultivars
(University of the Free State, 2005)English: • The objectives of this study were to characterize wheat cultivars grown in Lesotho according to their glutenin and gliadin banding patterns with the use of SOS-PAGE, estimate GCA, SCA, h2, heterosis and ... -
The influence of abiotic stress on CIMMYT provitamin A elite maize germplasm
(University of the Free State, 2017-01)Micronutrient malnutrition, including vitamin A deficiency, affects more than half of the world population, having a major effect on children less than five years old, pregnant and lactating women. The problem is significant ... -
Development of wheat lines with complex resistance to rusts and Fusarium head blight
(University of the Free State, 2017-06)Wheat is the second most important food crop worldwide. The world human population is increasing daily. Sustainable food production is necessary to ensure sufficient future food supply. Wheat production is negatively ... -
Genetic variability for forage yield and nutritive quality characteristics in selected inbred x Triticosecale genotypes
(University of the Free State, 2009-12)English: The objective of this study was to study the combining ability, heritability and additive genetic correlation of various nutritive quality, forage yield and animal production characteristics in a selected fixed ... -
Antioxidant, antidiabetic and cardioprotective activities of Dicoma anomala (sond.) used in the Basotho traditional medicine
(University of the Free State (Qwaqwa Campus), 2016-10)Dicoma anomala (Sond.) belongs to the Asteraceae family and locally called Hloenya (South Sotho), fever or stomach bush (Afrikaans). The plant is used in the management of various diseases, particularly diabetes mellitus ... -
'n Morfologiese studie van die genus Acacia Miller in Suid-Afrika
(University of the Free State, 1971-07)English: The genus Acacia is an extensive one with representatives in Africa, America, Asia and Australia. When Bentham revised the subfamily Mimosoideae in 1875 he divided the taxon into six subgenera. All the South ... -
Etiology of Fusarium crown and root rot of grain sorghum in South Africa
(University of the Free State, 2007-02)English: This study investigated the interaction between grain sorghum and Fusarium spp. associated with the crop in field soils and on sorghum roots as causal agents of crown and root rot. The effect of disease on plant ... -
Grain mould of sorghum with specific reference to grain quality in South Africa
(University of the Free State, 2006-05)English: The major sorghum grain mould fungi in South Africa were determined by assaying five sorghum cultivars from three localities in 2002 and eight localities in 2003. The predominant fungal isolates from all the ... -
Analyses of drought tolerance in durum wheat (Triticum turgidum var. durum) genotypes
(University of the Free State, 2003-03)English: In order to identify yield components associated with drought tolerance in durum wheat and evaluate the performace of Ethiopian durum wheat genotypes, 26 durum wheat genotypes, from different agro-ecologies of ... -
A comparison of monosomic and disomic substitution lines in the chromosomal location of leaf rust resistance genes in tetraploid wheats
(University of the Free State, 2003-05)English: Two sets of aneuploids were employed and compared to localize adult plant leaf rust resistance genes in tetraploid wheat accessions. One set was the hexaploid Chinese Spring (CS) A- and B-genome monosomics ... -
Isolation and characterization of a possible polygalacturonase: inhibiting protein from wheat
(University of the Free State, 2001)English: The presence and possible role of polygalacturonase-inhibiting protein (PGIP) in wheat (Triticum aestivum) as part of the plant's defense reaction following leaf rust (Puccinia triticina) infection were ... -
Control of foliar rusts of wheat in South Africa with special emphasis on Puccinia striiformis f. sp.Tritici
(University of the Free State, 2000-11)English: Stripe rust, caused by Puccinia striiformis Westend. f. sp. tritici Eriks., has become an endemic disease of wheat (Triticum aestivum L.) in South Africa after being observed for the first time near Moorreesburg, ... -
Enviromental influence on the expression of wheat protein fractions under South African drylands conditions
(University of the Free State, 2017-01)English: Ten South African hard red wheat cultivars (BettaDN, Caledon, Elands, Gariep, Komati, Limpopo, Matlabas, PAN3118, PAN3349 and PAN3377) were planted at five localities over two seasons in the winter dryland wheat ... -
Genetic variability for yield and quality characteristics in South African cotton germplasm (Gossypium hirsutum L.)
(University of the Free State, 1999)English: The objective of this research was to study the genetic variability in South African cotton germplasm and to identify superior parental lines for the improvement of yield and quality characteristics. 2 Six ... -
Inheritance of nitrogen use efficiency components in maize
(University of the Free State, 2001-12)English: The general objectives of this research were to study the genetic variability for nitrogen use efficiency components, to identify suitable inbred parental lines with out standing nitrogen efficiency characteristics, ... -
Genetic diversity analysis and genotpe x environment interaction in Ethiopian mustard (Brassica carinata A. Braun)
(University of the Free State, 2002-12)English: Ethiopian or Abyssinian mustard (Brassica carinata A. Braun) is one of the most important oil crops in Ethiopia. Apart from its phylogenetic relationships with other members of the genus Brassica, little information ... -
Studies on genetic variability, inheritance and heterosis in pepper (Capsicum annuum L.)
(University of the Free State, 2003-11)English: The knowledge of genetic similarity and dissimilarity among crop cultivars is of vital importance for the plant breeder. The genetic variability of 39 pepper (Capsicum annuum L.) genotypes of different varietal ... -
Genotypic response and heritability of Fusarium oxysporum resistance in tomato
(University of the Free State, 2003-11)English: This study reviewed principal aspects relating to Fusarium wilt race 2 resistance in tomatoes, caused by the fungus Fusarium oxysporum f. sp. Iycopersici. The classification and life cycle of Fusarium wilt, the ...
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