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08 October 2020 | Story Leonie Bolleurs | Photo Supplied
Dr Cornel Bender
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

Researchers urged to re-emphasise regeneration of grassroots
2013-10-23

23 October 2013

Institutions of higher learning have a critical role to play in the promotion and protection of indigenous knowledge systems. This is according to Dr Mogomme Masoga, UFS alumnus and Senior Researcher with the Development Bank of Southern Africa (DBSA).

Dr Masoga was addressing the 6th annual Indigenous Knowledge Systems (IKS) Symposium at the University of the Free State’s Qwaqwa Campus.

“The time has come for local communities rich with knowledge to be taken seriously by the researchers doing their work in those respective communities,” argued Dr Masoga.

“Power relations between the researcher and the communities involved in the research process should be clarified. The same applies to the ownership and control of knowledge generated and documented in a community.

“There is an increasing need for democratic and participatory development in our communities. This can be achieved by giving primacy to the interests, values and aspirations of the people at large. There must be a radical move from prevailing paradigm of development that suffers from relying on coercion and authoritarianism. There is a need to associate development with social needs. This will give validity and integrity to the local communities, thereby giving confidence to the leaders and their constituencies.”

Dr Masoga said that the time has come for African universities in particular to “de-emphasise factors that monopolise attention today. Factors like debt crisis, commodity prices and foreign investment, among others, must be replaced by emphasis on the regeneration of the grassroots. Many African universities and research institutions have not lived up to their responsibilities as guiding lights to the continent. However, all is not lost.

“The current global race for knowledge works against so-called developing countries, especially in Africa. There is a far greater need to have a code of ethics drawn up for researchers engaging with local communities, to ensure the promotion and protection of indigenous knowledge systems.”

Meanwhile, a cross-section of papers were also delivered during the symposium. These ranged from Moshoeshoe’s lessons in dealing with poverty alleviation as presented by Dr Samuel Mensah, Department of Economics, to indigenous grasses of Qwaqwa by Prof Rodney Moffett, Department of Plant Sciences. Also presenting lectures were Phephani Gumbi, African Languages; Tshele Moloi, School of Mathematics; Natural Sciences and Technology Education and Dr Tom Ashafa (Plant Sciences).

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