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Plant Sciences graduate contributes technique to manage stem rust

08 October 2020 | Story Leonie Bolleurs | Photo Supplied

Dr Cornel Bender received her PhD qualification at the virtual graduation ceremonies in October. The title of her thesis is: Stem rust resistance in South African wheat and triticale.

The rapid distribution of disease-causing organisms such as Ug99, a wheat stem-rust pathotype, pointed out just how vulnerable global cereal production is to disease outbreaks.

These cereals include wheat, barley, rye, oats, triticale, rice, maize, and millet and are one of the most important food sources for human consumption.

According to Dr Cornel Bender, the projected world population of 10 billion in 2057 requires a growth of more than 40% in cereal production. Wheat is grown on more hectares than any other cereal and is one of the most important sources of calories for humans. However, the growth rate of wheat yields has declined from the 1960s to the 1990s. Therefore, it is essential to increase global wheat production.

“With the regular appearance of more aggressive stem rust pathotypes in South Africa, there is a constant need to discover new sources of resistance, understand the genetic base of presently deployed sources in wheat, triticale and barley cultivars, and to manipulate the deployment of resistant sources through a more sustainable approach,” says Dr Bender.

Her PhD thesis, titled: Stem rust resistance in South African wheat and triticale, includes various fundamental aspects for the effective management of stem rust in South Africa.

Dr Bender is a Professional Officer in the Division of Plant Pathology in the Department of Plant Sciences, who received her PhD at the virtual graduation ceremonies in October.

Innovative and cost effective

Her promotors, Prof Zakkie Pretorius, Research Fellow, and Dr Willem Boshoff, Senior Lecturer in the Department of Plant Sciences, believe that she used an innovative approach to develop a cost-effective phenotyping method to select for more durable resistance types in a controlled greenhouse environment.

“In the past, results obtained from field trials used to assess adult plants for stem-rust resistance, were often influenced by abiotic factors, were seasonable in nature, expensive, and time consuming; therefore, the development of a dependable greenhouse screening system provides an important additional instrument for rust research,” says Dr Bender.

She adds that the greenhouse technique is used worldwide to screen for adult plant resistance and contribute to save time and money.

Broadening our knowledge

“Inheritance studies were undertaken to determine the genetic base of stem-rust resistance in selected South African wheat and triticale cultivars (developed from wheat/rye crosses) through seedling analysis as well as greenhouse and fieldwork,” she says.

Dr Bender believes the use and development of different resistance screening methods, the elucidation of host genetics, as well as the use of histological and microscopic methods to study early resistance responses, broaden our knowledge and understanding of stem-rust resistance in South African wheat and triticale cultivars.

Ultimately, rust researchers, grain producers, and also the general public – through access to their daily bread – will benefit from her study.

News Archive

Recognition to excellent researchers

2004-11-16

The University of the Free State will give recognition to excellent researchers at UFS on Tuesday 16 November 2004. “This recognition function will also serve as the first annual lecture in research excellence,” says Prof Frans Swanepoel, Director of Research Development Division at the UFS.

This is the first occasion of its kind in the UFS. It coincides with the university’s centenary celebrations. The recognition of excellent research shows the UFS’s commitment and innovative focus on research as one of its core functions,” says Prof. Swanepoel.

Recognition will be given in different categories. They are female researchers, black researchers, young researchers, C- and L-Rated researchers, researchers with significant research outputs, B-Rated researchers and distinguished professors in research.

The promotion of equity and development of research capacity of designated groups is one of the objectives of the UFS’s research strategy therefore the university is recognising the research achievements of 21 women and 16 black persons. Amongst these are Prof. Margaret Raftery (English and Classical Languages), Dr Liesl van As (Zoology and Entomology), Prof. Peter Mbati (head of the Qwaqwa campus) and Prof. Charles Ngwena (Constitutional Law and Philosophy of Law).

The UFS is also recognising nine young researchers. They must hold a doctorate and have the potential to establish themselves as researchers within a five-year period based on their performance and productivity as researchers during their doctoral studies and/or early post-doctoral careers. Amongst them are Dr Esta van Heerden (Microbial Biochemical and Food Biotechnology) and Prof. André Jooste (Agricultural Economics).

Fifty-eight established researchers with a sustained recent record of productivity are receiving recognition in the C- and L-rated researchers’ category. Amongst them were Prof. Hennie van Coller (Afrikaans, Dutch, German and French) and Prof. Gert Erasmus (Animal- and Wildlife- and Grassland Sciences).

Prof. Francois Tolmie (New Testament) and Prof. Gina Joubert (Biostatistics) are two of the twelve researchers that are receiving recognition for having excelled in research outputs during recent years.

Nine researchers are acknowledged in the B-category for the international recognition they receive from their peers for the high quality and impact of their recent research outputs. Amongst them were Prof. Johan Grobbelaar (Plant Sciences) and Prof. Hendrik Swart (Physics). Prof. Grobbelaar focused in his research on limnology, algal biotechnology, plant stress and Prof. Swart focused on solid state physics and degradation mechanisms that are responsible for the degradation of field emission and TV displays.

Seven individuals are recognised for their exceptional achievements as researchers. Prof. Frederick Fourie, Rector, but previously in the Department of Economics, is recognised for his research in two policy areas: Political Economics, Government Finance and Fiscal Policy, and Industrial Economics, in particular analysis of the South African industrial structure and competition policy, where his research contributions played a key role in reforming South Africa’s competition policy.

Prof. Lodewyk Kock (Microbial, Biochemical and Food Biotechnology) focuses in his research mainly on pure and oxidised edible oil where yeasts are used as a study model. He obtained national as well as international recognition for this research program.

The UFS is also awarding the S2A3 Bronze Medal to recognise a Master’s degree student who has delivered outstanding research in one of the sciences. Mr Pieter Taljaard and Ms Tania Venter are recognised in this category.

Media release
Issued by: Lacea Loader
Media Representative
Tel: (051) 401-2584
Cell: 083 645 2454
E-mail: loaderl.stg@mail.uovs.ac.za

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