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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

Department of Architecture recognises excellence
2014-11-20

 

From the left are: Gary Westwood, Marius du Plessis and Henry Pretorius
Photo: Ifa Tshishonge
Front page design by Marius du Plessis

Marius du Plessis received the first prize in the Regional Corobrik Student of the Year Award for his design of a National Geothermal Research and Educational Centre in Johannesburg. The award ceremony was hosted by the Department of Architecture at the University of the Free State.

Anja Lareman was awarded the second prize for her Psychiatric Unit for the Deaf in Worcester and Mariska Peel received third prize for her design of a laboratory for the after oil epoch in Durban.

The Corobrik award for Best use of clay masonry brickwork was awarded to Valentino Moutzouris for his design of a Performing Arts Centre in Wynberg, Cape Town.

The event was well attended by architecture students who hoped to take home an award. Projects exhibited, received distinctions in one or all of the three main components, including design, the architectural theoretical treatise and building sciences.

“This is the greatest award that one could win in the Free State. It came with so much blood, sweat and tears, as I had to live, eat and work day and night at the same place in order to finish the project,” said Marius, master’s student in Architecture. He said that he hopes the project can be developed and implemented in mine shafts to solve the energy crisis in South Africa.

Henry Pretorius, Academic Departmental Head of Architecture, said: “It is vital for architecture to have a public interface. This event is to showcase the work of students and to make sure that it is accessible to the public. It encourages students to understand the value of their own work and its cognisance to society.”

Gary Westwood, Sales Manager of Corobrik Free State, Northern Cape and Lesotho region, said: “So far it has been an incredible journey. This annual event of 24 years is our way of giving back to the community who supports and sustains our business. It is wonderful to see how the architecture industry has adapted to a more sustainable way of design, by being part of the green movement.”

Marius will compete with other Corobrik winners from various universities on national level in April 2015.

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