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Browsing Theses and Dissertations (University of Pretoria) by Supervisor "Oberholster, A.M."
Now showing items 1-20 of 24
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(University of Pretoria, 2005-05-20)Please read the summary in the section 02back (Appendix 1) of this document
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(University of Pretoria, 2008-07-15)This study represents the first comprehensive analysis of gene regulation underlying the distinct categories of resistance afforded to wheat (Triticum aestivum, L.) by different Dn genes. Russian wheat aphid (Diuraphis ...
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(University of Pretoria, 2011-06-27)Diuraphis noxia Kurdjumov (Hemiptera: Aphididae: Macrosiphini) is a major agricultural pest that causes extensive economic losses to the wheat and barley industries. Resistant cultivars were relatively successful in ...
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(University of Pretoria, 2005-05-19)Please read the abstract in the section 00front of this document
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(University of Pretoria, 2007-02-13)Please read the abstract in the section 00front of this document
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(University of Pretoria, 2005-09-07)Please read the abstract (Summary) in the section 00front of this document
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(University of Pretoria, 2007)The Russian wheat aphid (Diuraphis noxia, RWA), is a serious pest in most wheat producing countries around the world. Infestation of wheat fields by this pest has a severe economic impact, as a result of heavy losses in ...
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(University of Pretoria, 2008-07-01)The Russian wheat aphid (RWA) is a pest of cereals, such as wheat and barley. It feeds on these hosts by injecting saliva into the plants’ phloem tissue and consuming the mixture of saliva and photoassimilates. It has been ...
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(University of Pretoria, 2008-07-08)The first chapter gives an overall introduction to Arachis hypogaea L., the crop that was studied in this thesis. The literature reviewed touched on various aspects of the crop in general such as the importance of peanut ...
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(University of Pretoria, 2002)Please read the abstract in the section 07chapter7.
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(University of Pretoria, 2005)Knowledge of the genetic variation of crop collections is essential for their efficient use in plant breeding programs. The Ethiopian Highland Maize Germplasm Collection Mission was launched throughout the highlands of ...
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Genotype variation in regeneration and transformation efficiencies of South African wheat cultivars (University of Pretoria, 2010-08-04)The battle of wheat against pests and pathogens can be strengthened by genetically engineering the wheat plant for disease tolerance, e.g. by enhancing the expression of chitinase and â-1,3-glucanase genes. In order to ...
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(University of Pretoria, 2000)Please read the abstract in Chapter 6 of this document
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(University of Pretoria, 2007-04-07)Wheat is one of the major food crops consumed by man and is grown in a wide range of environments. One constraint in the production of wheat is the different diseases attack the crop. One such a diseases is leaf rust. Leaf ...
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(University of Pretoria, 2008-08-07)Maize is the staple food for the majority of Tanzanians. However, maize production in the Southern highlands of Tanzania (SHT) is highly reduced by gray leaf spot disease (GLS) caused by the fungus Cercospora zea maydis. ...
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(University of Pretoria, 2002)Please read the abstract in the section 00front of this document
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(University of Pretoria, 2006-11-30)Phytopathogenic fungi parasitise plants for survival. Knowledge of the interactions between plants and these fungi is of importance in designing control strategies. In this thesis the interactions of Eucalyptus ...
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(University of Pretoria, 2005-06-02)This thesis investigates the effect of Russian wheat aphid (RWA; Diuraphis noxia) infestation on the defence responses of the bread wheat line, PI 137739, on a molecular level. PI 137739 is known to contain the RWA resistance ...
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(University of Pretoria, 2011-06-07)No abstract available.
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(University of Pretoria, 2006-05-19)One of the most important photosynthetic enzymes in a plant is ribulose-1,5¬bisphosphate carboxylase/oxygenase (Rubisco), which plays a key role in carbon fixation. Degradation of this enzyme leads to decreased carbon ...
Now showing items 1-20 of 24